Postgres docker configuration
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@ -1,6 +1,72 @@
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{ pkgs, lib, inputs, config, ... }:
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let
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admin_dbPasswordFile = lib.optionalString (lib.hasAttr "sops-nix" inputs) config.sops.secrets."software/postgres/admin_db/password".path;
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initScript = pkgs.writeText "init.sh" ''
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#!/bin/bash
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function create_user_and_database() {
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local database=$1
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local user=$2
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local extensions=$3
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echo "### admin user: $POSTGRES_USER ###"
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echo " Creating database '$database'"
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echo " Creating user '$user'"
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psql -v --username "$POSTGRES_USER" -d "$POSTGRES_DB" <<-EOSQL
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CREATE USER $user;
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CREATE DATABASE $database;
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GRANT ALL PRIVILEGES ON DATABASE $database TO $user;
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EOSQL
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# Loop through extensions and create them
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for ext in $(echo "$extensions" | tr ',' ' '); do
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echo " - Installing extention $ext"
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psql -v --username "$POSTGRES_USER" -d "$database" -c "CREATE EXTENSION $ext;"
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done
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}
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if [ -n "$POSTGRES_MULTIPLE_DATABASES" ]; then
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# Parse the JSON string
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database_names=$(echo "$POSTGRES_MULTIPLE_DATABASES" | jq -r '.[0] | keys[]')
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echo "Multiple database creation requested: $(echo "$database_names" | tr "\n" " ")"
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# Loop through each database and create it
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for db_name in $database_names; do
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user=$(echo "$POSTGRES_MULTIPLE_DATABASES" | jq -r ".[0] | .''${db_name} | .user")
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extensions=$(echo "$POSTGRES_MULTIPLE_DATABASES" | jq -r ".[0] | .''${db_name} | .extensions | join(\",\")")
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create_user_and_database "$db_name" "$user" "$extensions"
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done
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fi
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'';
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pg_hbaConfig = pkgs.writeText "pg_hba.conf" ''
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none
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'';
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pgsqlConfig = pkgs.writeText "postgresql.conf" ''
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listen_addresses = '*'
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port = 5432
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max_connections = 100
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shared_buffers = 24GB
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work_mem = 1GB
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maintenance_work_mem = 10GB
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autovacuum_work_mem = 2GB
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dynamic_shared_memory_type = posix
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wal_level = minimal
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checkpoint_timeout = 60min
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checkpoint_completion_target = 0.9
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max_wal_size = 10GB
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min_wal_size = 80MB
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max_wal_senders = 0
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random_page_cost = 1.0
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effective_cache_size = 25GB
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jit = off
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log_line_prefix = '%m [%p] %q%u@%d '
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log_timezone = 'Etc/UTC'
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cluster_name = 'postgres-docker'
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datestyle = 'iso, dmy'
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timezone = 'Etc/UTC'
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default_text_search_config = 'pg_catalog.english'
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'';
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in
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{
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sops.secrets = {
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@ -12,7 +78,7 @@ in
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"db".settings.services."db".service = {
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restart = "unless-stopped";
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build.context = "/nix/store";
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build.dockerfile = builtins.baseNameOf "${pkgs.writeScript "pgDockerfile" ''
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build.dockerfile = builtins.baseNameOf "${pkgs.writeText "pgDockerfile" ''
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FROM postgres:16
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# install packages
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RUN apt-get update \
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@ -21,6 +87,7 @@ in
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jq \
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&& rm -rf /var/lib/apt/lists/*
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''}";
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command = [ "postgres" "-c" "config_file=/etc/postgresql/postgresql.conf" ];
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environment = {
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POSTGRES_PASSWORD_FILE = admin_dbPasswordFile;
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POSTGRES_USER = "admin";
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@ -48,59 +115,26 @@ in
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"user": "dbt",
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"extensions": []
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}
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"test": {
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"user": "test",
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"extensions": [hstore]
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}
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}
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]
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'';
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};
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ports = [ "5432:5432" ];
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volumes = [
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# Mount pgdata to external zfs volume
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"/mnt/postgres:/var/lib/postgresql/data"
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# Mount config files
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# "${pg_hbaConfig}:/var/lib/postgres/data/pgdata/pg_hba.conf"
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"${pgsqlConfig}:/etc/postgresql/postgresql.conf"
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# Need to mount secret file
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"${admin_dbPasswordFile}:${admin_dbPasswordFile}"
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# PG init script to parse json specified in POSTGRES_MULTIPLE_DATABASES
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# creates databases, users and installs extensions for each database.
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"${pkgs.writeScript "init.sh" ''
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#!/bin/bash
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function create_user_and_database() {
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local database=$1
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local user=$2
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local extensions=$3
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echo "### admin user: $POSTGRES_USER ###"
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echo " Creating database '$database'"
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echo " Creating user '$user'"
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psql -v --username "$POSTGRES_USER" -d "$POSTGRES_DB" <<-EOSQL
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CREATE USER $user;
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CREATE DATABASE $database;
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GRANT ALL PRIVILEGES ON DATABASE $database TO $user;
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EOSQL
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# Loop through extensions and create them
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for ext in $(echo "$extensions" | tr ',' ' '); do
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echo " - Installing extention $ext"
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psql -v --username "$POSTGRES_USER" -d "$database" -c "CREATE EXTENSION $ext;"
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done
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}
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if [ -n "$POSTGRES_MULTIPLE_DATABASES" ]; then
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# Parse the JSON string
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database_names=$(echo "$POSTGRES_MULTIPLE_DATABASES" | jq -r '.[0] | keys[]')
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echo "Multiple database creation requested: $(echo "$database_names" | tr "\n" " ")"
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# Loop through each database and create it
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for db_name in $database_names; do
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user=$(echo "$POSTGRES_MULTIPLE_DATABASES" | jq -r ".[0] | .''${db_name} | .user")
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extensions=$(echo "$POSTGRES_MULTIPLE_DATABASES" | jq -r ".[0] | .''${db_name} | .extensions | join(\",\")")
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create_user_and_database "$db_name" "$user" "$extensions"
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done
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fi
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''}:/docker-entrypoint-initdb.d/init.sh"
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"${initScript}:/docker-entrypoint-initdb.d/init.sh"
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];
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};
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};
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