Slim Installation
Module:
Pigsty has an entire infrastructure stack as an enclosure of HA PostgreSQL clusters, BUT it is viable to install only the PostgreSQL components without the rest of the stack. This is called a slim installation.
Overview
The slim installation focus on Pure HA-PostgreSQL Cluster, and it only installs essential components for this purpose.
There’s NO Infra modules, No monitoring, No local repo Just partial of NODE module, along with ETCD & PGSQL modules
Systemd Service Installed in this mode:
- patroni: REQUIRED, bootstrap HA PostgreSQL cluster
- etcd: REQUIRED, DCS for patroni
- pgbouncer: OPTIONAL, connection pooler for postgres
- vip-manager: OPTIONAL, if you want to use a L2 VIP bind to primary
- haproxy: OPTIONAL, if you wish to auto-routing service
- chronyd: OPTIONAL, if you wish to sync time with NTP server
- tuned: OPTIONAL, manage node template and kernel parameters
You can turn off the optional components, the only two essential components are patroni and etcd.
Configure
To perform a slim installation, you need to disable some switches in the pigsty.yml config file:
all:
children:
# actually not used
infra: { hosts: { 10.10.10.10: { infra_seq: 1 } } }
# etcd cluster for ha postgres, still required in minimal installation
etcd: { hosts: { 10.10.10.10: { etcd_seq: 1 } }, vars: { etcd_cluster: etcd } }
# postgres cluster 'pg-meta' with 2 instances
pg-meta:
hosts:
10.10.10.10: { pg_seq: 1, pg_role: primary }
10.10.10.11: { pg_seq: 2, pg_role: replica }
vars:
pg_cluster: pg-meta
pg_databases: [ { name: meta ,baseline: cmdb.sql ,comment: pigsty meta database ,schemas: [ pigsty ] ,extensions: [ { name: vector }] } ]
pg_users:
- { name: dbuser_meta ,password: DBUser.Meta ,pgbouncer: true ,roles: [ dbrole_admin ] ,comment: pigsty admin user }
- { name: dbuser_view ,password: DBUser.Viewer ,pgbouncer: true ,roles: [ dbrole_readonly ] ,comment: read-only viewer for meta database }
node_crontab: [ '00 01 * * * postgres /pg/bin/pg-backup full' ] # make a full backup every 1am
vars: # global parameters
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: oltp # node tuning specs: oltp,olap,tiny,crit
pg_conf: oltp.yml # pgsql tuning specs: {oltp,olap,tiny,crit}.yml
# slim installation setup
nginx_enabled: false # nginx not exists
dns_enabled: false # dnsmasq not exists
prometheus_enabled: false # prometheus not exists
grafana_enabled: false # grafana not exists
pg_exporter_enabled: false # disable pg_exporter
pgbouncer_exporter_enabled: false
pg_vip_enabled: false
#----------------------------------#
# Repo, Node, Packages
#----------------------------------#
node_repo_modules: node,infra,pgsql # use node_repo_modules instead of repo_modules
node_repo_remove: true # remove existing node repo for node managed by pigsty?
repo_packages: [ # default packages to be downloaded (if `repo_packages` is not explicitly set)
node-bootstrap, infra-package, infra-addons, node-package1, node-package2, pgsql-common #,docker
]
repo_extra_packages: [ # default postgres packages to be downloaded
pgsql-main
#,pgsql-core,pgsql-time,pgsql-gis,pgsql-rag,pgsql-fts,pgsql-olap,pgsql-feat,pgsql-lang,pgsql-type,pgsql-func,pgsql-admin,pgsql-stat,pgsql-sec,pgsql-fdw,pgsql-sim,pgsql-etl,
#,pg17-core,pg17-time,pg17-gis,pg17-rag,pg17-fts,pg17-olap,pg17-feat,pg17-lang,pg17-type,pg17-func,pg17-admin,pg17-stat,pg17-sec,pg17-fdw,pg17-sim,pg17-etl,
#,pg16-core,pg16-time,pg16-gis,pg16-rag,pg16-fts,pg16-olap,pg16-feat,pg16-lang,pg16-type,pg16-func,pg16-admin,pg16-stat,pg16-sec,pg16-fdw,pg16-sim,pg16-etl,
]
And use the slim.yml instead of the install.yml playbook:
./slim.yml
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