curl -fsSL https://repo.pigsty.io/get | bash; cd ~/pigsty;

./bootstrap; ./configure; ./install.yml; # 准备依赖，生成配置，安装 Pigsty 三步走！

./bootstrap   # 使用各种可选方式安装 Ansible 与 Jmespath 依赖，如果离线包存在则使用离线包

curl -fsSL https://repo.pigsty.cc/get | bash            # 安装最新稳定版本 
curl -fsSL https://repo.pigsty.cc/get | bash -s v3.1.0  # 安装特定版本 3.1.0

git clone https://github.com/Vonng/pigsty; cd pigsty; git checkout v3.1.0

./configure # 不带参数会自动推荐配置，并交互式问询
./configure [-i|--ip <ipaddr>]                     # 指定首要 IP 地址，如果不指定，将在检测到多个可用IP地址时问询。
            [-c|--conf <conf>]                     # 指定配置模板（相对于 conf/ 目录的配置名称，不带.yml 后缀），默认使用 meta 单节点模板
            [-v|--version <ver>]                   # 指定要安装 PostgreSQL 大版本，部分模板不适用此配置 
            [-r|--region <default|china|europe>]   # 选择镜像源区域，如果在 GFW 区域内，将被设置为 china
            [-n|--non-interactive]                 # 跳过交互式向导
            [-x|--proxy]                           # 将环境变量中的代理配置写入配置文件的 proxy_env 参数中

./install.yml    # 一次性在所有节点上完成安装

bin/node-add   pg-test      # 将集群 pg-test 的3个节点纳入 Pigsty 管理
bin/pgsql-add  pg-test      # 初始化一个3节点的 pg-test 高可用PG集群
bin/redis-add  redis-ms     # 初始化 Redis 集群： redis-ms

./cache.yml -l infra  

./cache.yml -l infra -e '{"cache_pkg_dir":"files","cache_pkg_name":"pkg.tgz"}'

sudo rm -rf /www/pigsty ； sudo tar -xf /tmp/pkg.tgz -C /www 

./bootstrap       # 确保 ansible 正确安装（如果有离线包，优先使用离线安装并解包使用）

./boostrap
   [-r|--region <region]   [default,china,europe]
   [-p|--path <path>]      specify another offline pkg path
   [-k|--keep]             keep existing upstream repo during bootstrap

all:
  children:
    infra: { hosts: { 10.10.10.10: { infra_seq: 1 } }, vars: { docker_enabled: true } }

    etcd:
      hosts:
        10.10.10.10: { etcd_seq:  1 }
        #10.10.10.11: { etcd_seq:  2 } # optional
        #10.10.10.12: { etcd_seq:  3 } # optional
      vars: { etcd_cluster: etcd }

    pg-meta:
      hosts:
        10.10.10.10: { pg_seq: 1, pg_role: primary }  # init one single-node pgsql cluster by default, with:
        #10.10.10.11: { pg_seq: 2, pg_role: replica } # optional replica : bin/pgsql-add pg-meta 10.10.10.11
        #10.10.10.12: { pg_seq: 3, pg_role: replica } # optional replica : bin/pgsql-add pg-meta 10.10.10.12
      vars:
        pg_cluster: pg-meta
        pg_users:         # define business users here: https://pigsty.io/docs/pgsql/user/
          - { name: dbuser_meta ,password: DBUser.Meta ,pgbouncer: true ,roles: [ dbrole_admin ] ,comment: pigsty default user }
        pg_databases:     # define business databases here: https://pigsty.io/docs/pgsql/db/
          - { name: meta ,comment: pigsty default database  }
        pg_hba_rules:     # define HBA rules here: https://pigsty.io/docs/pgsql/hba/#define-hba
          - { user: dbuser_meta , db: all ,addr: world ,auth: pwd ,title: 'allow default user world access with password (not a good idea!)' }
        node_crontab:     # define backup policy with crontab (full|diff|incr)
          - '00 01 * * * postgres /pg/bin/pg-backup full'
        #pg_vip_address: 10.10.10.2/24  # optional l2 vip address and netmask
        pg_extensions:    # define pg extensions (345 available): https://pigsty.io/docs/pgext/
          - postgis timescaledb pgvector

  vars:
    version: v3.1.0                   # pigsty version string
    admin_ip: 10.10.10.10             # admin node ip address
    region: default                   # upstream mirror region: default|china|europe
    node_tune: tiny                   # use tiny template for NODE  in demo environment
    pg_conf: tiny.yml                 # use tiny template for PGSQL in demo environment

    # minimal installation setup
    node_repo_modules: node,infra,pgsql
    nginx_enabled: false
    dns_enabled: false
    prometheus_enabled: false
    grafana_enabled: false
    pg_exporter_enabled: false
    pgbouncer_exporter_enabled: false
    pg_vip_enabled: false

./slim.yml

all:                  # 顶层对象：all
  vars: {...}         # 全局参数
  children:           # 组定义
    infra:            # 组定义：'infra'
      hosts: {...}        # 组成员：'infra'
      vars:  {...}        # 组参数：'infra'
    etcd:    {...}    # 组定义：'etcd'
    pg-meta: {...}    # 组定义：'pg-meta'
    pg-test: {...}    # 组定义：'pg-test'
    redis-test: {...} # 组定义：'redis-test'
    # ...

pg-test:   # 集群名称
  vars:    # 集群参数
    pg_cluster: pg-test
  hosts:   # 集群成员
    10.10.10.11: { pg_seq: 1, pg_role: primary } # 实例1，在 10.10.10.11 上，主库
    10.10.10.12: { pg_seq: 2, pg_role: replica } # 实例2，在 10.10.10.12 上，从库
    10.10.10.13: { pg_seq: 3, pg_role: offline } # 实例3，在 10.10.10.13 上，从库

命令行参数 > 剧本变量  >  主机变量（实例参数）  >  组变量（集群参数）  >  全局变量（全局参数） >  默认值

./node.yml -i files/pigsty/rpmbuild.yml    # 根据 rpmbuild 配置文件，初始化目标节点，而不是使用默认的 pigsty.yml 配置文件

nodes:    
  hosts:  # 10.10.10.10 无法直接 ssh，但可以通过ssh别名 `meta` 访问
    10.10.10.10: { ansible_host: meta }

ssh <ip|alias> 'sudo ls'

curl -fsSL https://repo.pigsty.cc/get | bash

  playbook  / command / group         infra           nodes    etcd     minio     pgsql
[infra.yml] ./infra.yml [-l infra]   [+infra][+node] 
[node.yml]  ./node.yml                               [+node]  [+node]  [+node]   [+node]
[etcd.yml]  ./etcd.yml  [-l etcd ]                            [+etcd]
[minio.yml] ./minio.yml [-l minio]                                     [+minio]
[pgsql.yml] ./pgsql.yml                                                          [+pgsql]

./node.yml -i files/pigsty/rpmbuild.yml    # 根据 rpmbuild 配置文件，初始化目标节点，而不是使用默认的 pigsty.yml 配置文件
./pgsql.yml -i files/pigsty/rpm.yml        # 根据 files/pigsty/rpm.yml 配置文件中的定义，在目标节点上安装 pgsql 模块
./redis.yml -i files/pigsty/redis.yml      # 根据 files/pigsty/redis.yml 配置文件中的定义，在目标节点上安装 redis 模块

./pgsql.yml                              # 在所有主机上运行（非常危险！）
./pgsql.yml   -l pg-test                 # 在 pg-test 集群上运行
./pgsql.yml   -l 10.10.10.10             # 在单个主机 10.10.10.10 上运行
./pgsql.yml   -l pg-*                    # 在与通配符 `pg-*` 匹配的主机/组上运行
./pgsql.yml   -l '10.10.10.11,&pg-test'  # 在组 pg-test 的 10.10.10.10 上运行
/pgsql-rm.yml -l 'pg-test,!10.10.10.11'  # 在 pg-test 上运行，除了 10.10.10.11 以外
./pgsql.yml   -l pg-test                 # 在 pg-test 集群的主机上执行 pgsql 剧本

./pgsql.yml -t pg_clean    # 如果必要，清理现有的 postgres
./pgsql.yml -t pg_dbsu     # 为 postgres dbsu 设置操作系统用户 sudo
./pgsql.yml -t pg_install  # 安装 postgres 包和扩展
./pgsql.yml -t pg_dir      # 创建 postgres 目录并设置 fhs
./pgsql.yml -t pg_util     # 复制工具脚本，设置别名和环境
./pgsql.yml -t patroni     # 使用 patroni 引导 postgres
./pgsql.yml -t pg_user     # 提供 postgres 业务用户
./pgsql.yml -t pg_db       # 提供 postgres 业务数据库
./pgsql.yml -t pg_backup   # 初始化 pgbackrest 仓库和 basebackup
./pgsql.yml -t pgbouncer   # 与 postgres 一起部署 pgbouncer sidecar
./pgsql.yml -t pg_vip      # 使用 vip-manager 将 vip 绑定到 pgsql 主库
./pgsql.yml -t pg_dns      # 将 dns 名称注册到 infra dnsmasq
./pgsql.yml -t pg_service  # 使用 haproxy 暴露 pgsql 服务
./pgsql.yml -t pg_exporter # 使用 haproxy 暴露 pgsql 服务
./pgsql.yml -t pg_register # 将 postgres 注册到 pigsty 基础设施

# 运行多个任务：重新加载 postgres 和 pgbouncer hba 规则
./pgsql.yml -t pg_hba,pg_reload,pgbouncer_hba,pgbouncer_reload

# 运行多个任务：刷新 haproxy 配置并重新加载
./node.yml -t haproxy_config,haproxy_reload

./node.yml -e ansible_user=admin -k -K                  # 作为另一个用户运行剧本（带有 admin sudo 密码）
./pgsql.yml -e pg_clean=true                            # 在初始化 pgsql 实例时强制清除现有的 postgres
./pgsql-rm.yml -e pg_uninstall=true                     # 在 postgres 实例被删除后明确卸载 rpm
./redis.yml -l 10.10.10.11 -e redis_port=6379 -t redis  # 初始化一个特定的 redis 实例：10.10.10.11:6379
./redis-rm.yml -l 10.10.10.13 -e redis_port=6379        # 删除一个特定的 redis 实例：10.10.10.11:6379

# 通过指定软件包与仓库模块，在节点上安装 duckdb
./node.yml -t node_repo,node_pkg  -e '{"node_repo_modules":"infra","node_default_packages":["duckdb"]}'

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install vagrant virtualbox ansible   # 在 MacOS 中可以轻松一键安装，但只有 x86_64 Intel 芯片的可以 

Specs = [
  {"name" => "meta",   "ip" => "10.10.10.10", "cpu" => "2",  "mem" => "4096", "image" => "generic/rocky9" },
  {"name" => "node-1", "ip" => "10.10.10.11", "cpu" => "1",  "mem" => "2048", "image" => "generic/rocky9" },
  {"name" => "node-2", "ip" => "10.10.10.12", "cpu" => "1",  "mem" => "2048", "image" => "generic/rocky9" },
  {"name" => "node-3", "ip" => "10.10.10.13", "cpu" => "1",  "mem" => "2048", "image" => "generic/rocky9" },
]

cd ~/pigsty
vagrant/switch <spec>

vagrant/switch meta     # singleton meta        | 别名：`make v1`
vagrant/switch full     # 4-node sandbox        | 别名：`make v4`
vagrant/switch el7      # 3-node el7 test       | 别名：`make v7`
vagrant/switch el8      # 3-node el8 test       | 别名：`make v8`
vagrant/switch el9      # 3-node el9 test       | 别名：`make v9`
vagrant/switch prod     # prod simulation       | 别名：`make vp`
vagrant/switch build    # building environment  | 别名：`make vd`
vagrant/switch minio    # 3-node minio env
vagrant/switch check    # 30-node check env

make         # 等于 make start
make new     # 销毁现有虚拟机，根据规格创建新的
make ssh     # 将 SSH 配置写入到 ~/.ssh/ 中 （新虚拟机拉起后必须完成这一步）
make dns     # 将 虚拟机 DNS 记录写入到 /etc/hosts 中 （如果想使用名称访问虚拟机)
make start   # 等于先执行 up ，再执行 ssh 
make up      # 根据配置拉起虚拟机，或启动现有虚拟机
make halt    # 关停现有虚拟机 (down,dw)
make clean   # 销毁现有虚拟机 (clean/del/destroy)
make status  # 显示虚拟机状态 (st)
make pause   # 暂停虚拟机运行 (suspend,pause)
make resume  # 恢复虚拟机运行 (resume)
make nuke    # 使用 virsh 销毁所有虚拟机 (仅libvirt可用) 

make meta     # 单个元节点
make full     # 4-节点沙箱
make el7      # 3-节点 el7 测试环境
make el8      # 3-节点 el8 测试环境
make el9      # 3-节点 el9 测试环境
make prod     # 42 节点生产仿真环境
make build    # 3-节点 EL7,8,9 构建环境
make check    # 30-节点构建校验测试环境
make minio    # 3-节点 MinIO 测试环境

make meta  install  # 进行完整的单机安装
make full  install  # 进行4节点沙箱安装
make prod  install  # 进行42节点生产仿真环境安装
make check install  # 进行30节点本地测试环境安装
...

cd terraform                         # 进入 Terraform 模板目录
cp spec/alicloud.tf terraform.tf     # 使用 阿里云 Terraform 模板

terraform init      # 安装 terraform 云供应商插件：例如默认的 aliyun 插件 (第一次使用时安装即可)
terraform apply     # 生成执行计划，显示会创建的云资源：虚拟机，网络，安全组，等等等等……

SET log_statement TO 'none';
ALTER USER "{{ user.name }}" PASSWORD '{{ user.password }}';
SET log_statement TO DEFAULT;

repo_upstream:
  - { name: pigsty-local   ,description: 'Pigsty Local'      ,module: local ,releases: [7,8,9] ,baseurl: { default: 'http://${admin_ip}/pigsty'  }} # used by intranet nodes
  - { name: pigsty-infra   ,description: 'Pigsty INFRA'      ,module: infra ,releases: [7,8,9] ,baseurl: { default: 'https://repo.pigsty.io/rpm/infra/$basearch' ,china: 'https://repo.pigsty.cc/rpm/infra/$basearch' }}
  - { name: pigsty-pgsql   ,description: 'Pigsty PGSQL'      ,module: pgsql ,releases: [7,8,9] ,baseurl: { default: 'https://repo.pigsty.io/rpm/pgsql/el$releasever.$basearch' ,china: 'https://repo.pigsty.cc/rpm/pgsql/el$releasever.$basearch' }}
  - { name: nginx          ,description: 'Nginx Repo'        ,module: infra ,releases: [7,8,9] ,baseurl: { default: 'https://nginx.org/packages/centos/$releasever/$basearch/' }}
  - { name: docker-ce      ,description: 'Docker CE'         ,module: infra ,releases: [7,8,9] ,baseurl: { default: 'https://download.docker.com/linux/centos/$releasever/$basearch/stable'        ,china: 'https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/$basearch/stable'  ,europe: 'https://mirrors.xtom.de/docker-ce/linux/centos/$releasever/$basearch/stable' }}
  - { name: base           ,description: 'EL 7 Base'         ,module: node  ,releases: [7    ] ,baseurl: { default: 'http://mirror.centos.org/centos/$releasever/os/$basearch/'                    ,china: 'https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/'           ,europe: 'https://mirrors.xtom.de/centos/$releasever/os/$basearch/'           }}
  - { name: updates        ,description: 'EL 7 Updates'      ,module: node  ,releases: [7    ] ,baseurl: { default: 'http://mirror.centos.org/centos/$releasever/updates/$basearch/'               ,china: 'https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/'      ,europe: 'https://mirrors.xtom.de/centos/$releasever/updates/$basearch/'      }}
  - { name: extras         ,description: 'EL 7 Extras'       ,module: node  ,releases: [7    ] ,baseurl: { default: 'http://mirror.centos.org/centos/$releasever/extras/$basearch/'                ,china: 'https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/'       ,europe: 'https://mirrors.xtom.de/centos/$releasever/extras/$basearch/'       }}
  - { name: epel           ,description: 'EL 7 EPEL'         ,module: node  ,releases: [7    ] ,baseurl: { default: 'http://download.fedoraproject.org/pub/epel/$releasever/$basearch/'            ,china: 'https://mirrors.tuna.tsinghua.edu.cn/epel/$releasever/$basearch/'                ,europe: 'https://mirrors.xtom.de/epel/$releasever/$basearch/'                }}
  - { name: centos-sclo    ,description: 'EL 7 SCLo'         ,module: node  ,releases: [7    ] ,baseurl: { default: 'http://mirror.centos.org/centos/$releasever/sclo/$basearch/sclo/'             ,china: 'https://mirrors.aliyun.com/centos/$releasever/sclo/$basearch/sclo/'              ,europe: 'https://mirrors.xtom.de/centos/$releasever/sclo/$basearch/sclo/'    }}
  - { name: centos-sclo-rh ,description: 'EL 7 SCLo rh'      ,module: node  ,releases: [7    ] ,baseurl: { default: 'http://mirror.centos.org/centos/$releasever/sclo/$basearch/rh/'               ,china: 'https://mirrors.aliyun.com/centos/$releasever/sclo/$basearch/rh/'                ,europe: 'https://mirrors.xtom.de/centos/$releasever/sclo/$basearch/rh/'      }}
  - { name: baseos         ,description: 'EL 8+ BaseOS'      ,module: node  ,releases: [  8,9] ,baseurl: { default: 'https://dl.rockylinux.org/pub/rocky/$releasever/BaseOS/$basearch/os/'         ,china: 'https://mirrors.aliyun.com/rockylinux/$releasever/BaseOS/$basearch/os/'          ,europe: 'https://mirrors.xtom.de/rocky/$releasever/BaseOS/$basearch/os/'     }}
  - { name: appstream      ,description: 'EL 8+ AppStream'   ,module: node  ,releases: [  8,9] ,baseurl: { default: 'https://dl.rockylinux.org/pub/rocky/$releasever/AppStream/$basearch/os/'      ,china: 'https://mirrors.aliyun.com/rockylinux/$releasever/AppStream/$basearch/os/'       ,europe: 'https://mirrors.xtom.de/rocky/$releasever/AppStream/$basearch/os/'  }}
  - { name: extras         ,description: 'EL 8+ Extras'      ,module: node  ,releases: [  8,9] ,baseurl: { default: 'https://dl.rockylinux.org/pub/rocky/$releasever/extras/$basearch/os/'         ,china: 'https://mirrors.aliyun.com/rockylinux/$releasever/extras/$basearch/os/'          ,europe: 'https://mirrors.xtom.de/rocky/$releasever/extras/$basearch/os/'     }}
  - { name: crb            ,description: 'EL 9 CRB'          ,module: node  ,releases: [    9] ,baseurl: { default: 'https://dl.rockylinux.org/pub/rocky/$releasever/CRB/$basearch/os/'            ,china: 'https://mirrors.aliyun.com/rockylinux/$releasever/CRB/$basearch/os/'             ,europe: 'https://mirrors.xtom.de/rocky/$releasever/CRB/$basearch/os/'        }}
  - { name: powertools     ,description: 'EL 8 PowerTools'   ,module: node  ,releases: [  8  ] ,baseurl: { default: 'https://dl.rockylinux.org/pub/rocky/$releasever/PowerTools/$basearch/os/'     ,china: 'https://mirrors.aliyun.com/rockylinux/$releasever/PowerTools/$basearch/os/'      ,europe: 'https://mirrors.xtom.de/rocky/$releasever/PowerTools/$basearch/os/' }}
  - { name: epel           ,description: 'EL 8+ EPEL'        ,module: node  ,releases: [  8,9] ,baseurl: { default: 'http://download.fedoraproject.org/pub/epel/$releasever/Everything/$basearch/' ,china: 'https://mirrors.tuna.tsinghua.edu.cn/epel/$releasever/Everything/$basearch/'     ,europe: 'https://mirrors.xtom.de/epel/$releasever/Everything/$basearch/'     }}
  - { name: pgdg-common    ,description: 'PostgreSQL Common' ,module: pgsql ,releases: [7,8,9] ,baseurl: { default: 'https://download.postgresql.org/pub/repos/yum/common/redhat/rhel-$releasever-$basearch' ,china: 'https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/yum/common/redhat/rhel-$releasever-$basearch' , europe: 'https://mirrors.xtom.de/postgresql/repos/yum/common/redhat/rhel-$releasever-$basearch' }}
  - { name: pgdg-extras    ,description: 'PostgreSQL Extra'  ,module: pgsql ,releases: [7,8,9] ,baseurl: { default: 'https://download.postgresql.org/pub/repos/yum/common/pgdg-rhel$releasever-extras/redhat/rhel-$releasever-$basearch' ,china: 'https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/yum/common/pgdg-rhel$releasever-extras/redhat/rhel-$releasever-$basearch' , europe: 'https://mirrors.xtom.de/postgresql/repos/yum/common/pgdg-rhel$releasever-extras/redhat/rhel-$releasever-$basearch' }}
  - { name: pgdg-el8fix    ,description: 'PostgreSQL EL8FIX' ,module: pgsql ,releases: [  8  ] ,baseurl: { default: 'https://download.postgresql.org/pub/repos/yum/common/pgdg-centos8-sysupdates/redhat/rhel-8-x86_64/' ,china: 'https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/yum/common/pgdg-centos8-sysupdates/redhat/rhel-8-x86_64/' , europe: 'https://mirrors.xtom.de/postgresql/repos/yum/common/pgdg-centos8-sysupdates/redhat/rhel-8-x86_64/' } }
  - { name: pgdg-el9fix    ,description: 'PostgreSQL EL9FIX' ,module: pgsql ,releases: [    9] ,baseurl: { default: 'https://download.postgresql.org/pub/repos/yum/common/pgdg-rocky9-sysupdates/redhat/rhel-9-x86_64/'  ,china: 'https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/yum/common/pgdg-rocky9-sysupdates/redhat/rhel-9-x86_64/' , europe: 'https://mirrors.xtom.de/postgresql/repos/yum/common/pgdg-rocky9-sysupdates/redhat/rhel-9-x86_64/' }}
  - { name: pgdg15         ,description: 'PostgreSQL 15'     ,module: pgsql ,releases: [7    ] ,baseurl: { default: 'https://download.postgresql.org/pub/repos/yum/15/redhat/rhel-$releasever-$basearch' ,china: 'https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/yum/15/redhat/rhel-$releasever-$basearch' ,europe: 'https://mirrors.xtom.de/postgresql/repos/yum/15/redhat/rhel-$releasever-$basearch' }}
  - { name: pgdg16         ,description: 'PostgreSQL 16'     ,module: pgsql ,releases: [  8,9] ,baseurl: { default: 'https://download.postgresql.org/pub/repos/yum/16/redhat/rhel-$releasever-$basearch' ,china: 'https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/yum/16/redhat/rhel-$releasever-$basearch' ,europe: 'https://mirrors.xtom.de/postgresql/repos/yum/16/redhat/rhel-$releasever-$basearch' }}
  - { name: timescaledb    ,description: 'TimescaleDB'       ,module: pgsql ,releases: [7,8,9] ,baseurl: { default: 'https://packagecloud.io/timescale/timescaledb/el/$releasever/$basearch'  }}

make repo-build      # ./infra.yml -t repo_build  

./infra.yml -t repo_create

make repo-build      # ./infra.yml -t repo_build  

ansible all -b -a 'yum remove -y nscd'

./infra.yml -t repo_upstream      # add upstream repos
cd /www/pigsty;                   # download missing packages
repotrack annobin gcc-plugin-annobin libuser
./infra.yml -t repo_create        # create repo

[defaults]
timeout = 10 # 将其修改为 60，120 或更高。

$ grep version pigsty.yml 

$ cat /etc/os-release

$ uname -a

cat ~/pigsty/pigsty.yml

journalctl -u patroni
journalctl -u <service name>

                    GNU AFFERO GENERAL PUBLIC LICENSE
                       Version 3, 19 November 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The GNU Affero General Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure
cooperation with the community in the case of network server software.

  The licenses for most software and other practical works are designed
to take away your freedom to share and change the works.  By contrast,
our General Public Licenses are intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.

  Developers that use our General Public Licenses protect your rights
with two steps: (1) assert copyright on the software, and (2) offer
you this License which gives you legal permission to copy, distribute
and/or modify the software.

  A secondary benefit of defending all users' freedom is that
improvements made in alternate versions of the program, if they
receive widespread use, become available for other developers to
incorporate.  Many developers of free software are heartened and
encouraged by the resulting cooperation.  However, in the case of
software used on network servers, this result may fail to come about.
The GNU General Public License permits making a modified version and
letting the public access it on a server without ever releasing its
source code to the public.

  The GNU Affero General Public License is designed specifically to
ensure that, in such cases, the modified source code becomes available
to the community.  It requires the operator of a network server to
provide the source code of the modified version running there to the
users of that server.  Therefore, public use of a modified version, on
a publicly accessible server, gives the public access to the source
code of the modified version.

  An older license, called the Affero General Public License and
published by Affero, was designed to accomplish similar goals.  This is
a different license, not a version of the Affero GPL, but Affero has
released a new version of the Affero GPL which permits relicensing under
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  The precise terms and conditions for copying, distribution and
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                       TERMS AND CONDITIONS

  0. Definitions.

  "This License" refers to version 3 of the GNU Affero General Public License.

  "Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.

  "The Program" refers to any copyrightable work licensed under this
License.  Each licensee is addressed as "you".  "Licensees" and
"recipients" may be individuals or organizations.

  To "modify" a work means to copy from or adapt all or part of the work
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exact copy.  The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.

  A "covered work" means either the unmodified Program or a work based
on the Program.

  To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy.  Propagation includes copying,
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public, and in some countries other activities as well.

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  An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
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the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.

  1. Source Code.

  The "source code" for a work means the preferred form of the work
for making modifications to it.  "Object code" means any non-source
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"Major Component", in this context, means a major essential component
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  The "Corresponding Source" for a work in object code form means all
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which are not part of the work.  For example, Corresponding Source
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  The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
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  The Corresponding Source for a work in source code form is that
same work.

  2. Basic Permissions.

  All rights granted under this License are granted for the term of
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permission to run the unmodified Program.  The output from running a
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  You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
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with facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright.  Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
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  Conveying under any other circumstances is permitted solely under
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similar laws prohibiting or restricting circumvention of such
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  When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect to
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users, your or third parties' legal rights to forbid circumvention of
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  4. Conveying Verbatim Copies.

  You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
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keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
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  You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.

  5. Conveying Modified Source Versions.

  You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these conditions:

    a) The work must carry prominent notices stating that you modified
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    b) The work must carry prominent notices stating that it is
    released under this License and any conditions added under section
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    c) You must license the entire work, as a whole, under this
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    regardless of how they are packaged.  This License gives no
    permission to license the work in any other way, but it does not
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    d) If the work has interactive user interfaces, each must display
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    work need not make them do so.

  A compilation of a covered work with other separate and independent
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and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
"aggregate" if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation's users
beyond what the individual works permit.  Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.

  6. Conveying Non-Source Forms.

  You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the
machine-readable Corresponding Source under the terms of this License,
in one of these ways:

    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.

    b) Convey the object code in, or embodied in, a physical product
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    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that product
    model, to give anyone who possesses the object code either (1) a
    copy of the Corresponding Source for all the software in the
    product that is covered by this License, on a durable physical
    medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this
    conveying of source, or (2) access to copy the
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    c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source.  This
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    d) Convey the object code by offering access from a designated
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    e) Convey the object code using peer-to-peer transmission, provided
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    charge under subsection 6d.

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from the Corresponding Source as a System Library, need not be
included in conveying the object code work.

  A "User Product" is either (1) a "consumer product", which means any
tangible personal property which is normally used for personal, family,
or household purposes, or (2) anything designed or sold for incorporation
into a dwelling.  In determining whether a product is a consumer product,
doubtful cases shall be resolved in favor of coverage.  For a particular
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typical or common use of that class of product, regardless of the status
of the particular user or of the way in which the particular user
actually uses, or expects or is expected to use, the product.  A product
is a consumer product regardless of whether the product has substantial
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  "Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to install
and execute modified versions of a covered work in that User Product from
a modified version of its Corresponding Source.  The information must
suffice to ensure that the continued functioning of the modified object
code is in no case prevented or interfered with solely because
modification has been made.

  If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information.  But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).

  The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or updates
for a work that has been modified or installed by the recipient, or for
the User Product in which it has been modified or installed.  Access to a
network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and
protocols for communication across the network.

  Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.

  7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.

  When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it.  (Additional permissions may be written to require their own
removal in certain cases when you modify the work.)  You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.

  Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:

    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or

    c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in
    reasonable ways as different from the original version; or

    d) Limiting the use for publicity purposes of names of licensors or
    authors of the material; or

    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions of
    it) with contractual assumptions of liability to the recipient, for
    any liability that these contractual assumptions directly impose on
    those licensors and authors.

  All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10.  If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term.  If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.

  If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.

  Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.

  8. Termination.

  You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).

  However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.

  Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.

  Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License.  If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.

  10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.

  An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations.  If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.

  You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.

  11. Patents.

  A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version.  For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.

  Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.

  In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement).  To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.

  If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients.  "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.

  If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.

  A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License.  You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.

  Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

  If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all.  For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.

  13. Remote Network Interaction; Use with the GNU General Public License.

  Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
from a network server at no charge, through some standard or customary
means of facilitating copying of software.  This Corresponding Source
shall include the Corresponding Source for any work covered by version 3
of the GNU General Public License that is incorporated pursuant to the
following paragraph.

  Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work.  The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions of
the GNU Affero General Public License from time to time.  Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

  Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation.  If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever published
by the Free Software Foundation.

  If the Program specifies that a proxy can decide which future
versions of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.

  Later license versions may give you additional or different
permissions.  However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.

  15. Disclaimer of Warranty.

  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

  16. Limitation of Liability.

  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    Copyright (C) 2018-2024  Ruohang Feng, Author of Pigsty

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source.  For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code.  There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.

  You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.