postgresql backup

postgresql/Makefile

@@ -48,7 +48,12 @@ dryrun:
 	install -D -m 0644 -o root -g root $< $@
 
 /etc/quadlets/$(PROJECT_NAME)/%: config/%
-	install -D -m 0644 -o root -g root $< $@
+	@run() { echo $$*; "$$@"; }; \
+	if [ -x $< ]; then \
+		run install -D -m 0755 -o root -g root $< $@; \
+	else \
+		run install -D -m 0644 -o root -g root $< $@; \
+	fi
 
 install: pre-requisites dryrun $(TARGET_QUADLETS_FILES) $(TARGET_SYSTEMD_FILES) $(TARGET_CONFIG_FILES)
 	systemctl daemon-reload
@@ -63,4 +68,4 @@ uninstall: pre-requisites
 	systemctl daemon-reload
 
 clean:
-	rm -rf /var/lib/quadlets/$(PROJECT_NAME)/ /etc/quadlets/$(PROJECT_NAME)/
+	rm -rf /var/lib/quadlets/$(PROJECT_NAME)/ /var/run/quadlets/$(PROJECT_NAME)/ /etc/quadlets/$(PROJECT_NAME)/

postgresql/config/backup.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -Eeuo pipefail
+
+export PGHOST=/var/run/postgresql
+
+BACKUP_DIR=/backup/$(date +%Y%m%d)
+mkdir -p "$BACKUP_DIR"
+
+psql -c "SELECT datname FROM pg_database WHERE datname NOT IN ('template0', 'template1', 'postgres');" -t | while read db; do
+  if [ -z "$db" ]; then
+    continue
+  fi
+  
+  echo "Backup of database $db..."
+  pg_dump -c --if-exists "$db" | gzip -c > "$BACKUP_DIR/dump-$db.sql.gz"
+done
+echo "Complete backup of the whole PostgreSQL server..."
+pg_basebackup -D "$BACKUP_DIR/pg_basebackup"
+echo "Backups stored in $BACKUP_DIR"

postgresql/postgresql-backup.container

@@ -0,0 +1,46 @@
+[Unit]
+Description=PostgreSQL Database Server - Backup
+Documentation=https://hub.docker.com/_/postgres/
+After=network.target postgresql-server.service
+Requires=postgresql-server.service
+
+# Start/stop this unit when the target is started/stopped
+PartOf=postgresql.target
+
+[Container]
+ContainerName=postgresql-backup-job
+Image=docker.io/library/postgres:${PG_MAJOR}-alpine
+
+# Network configuration
+Network=host
+
+# Those environment variables will be injected by podman into the container
+EnvironmentFile=/etc/quadlets/postgresql/config.env
+
+# Use a custom backup script
+Entrypoint=/usr/local/bin/backup.sh
+User=postgres
+
+# Volume mounts
+Volume=/var/lib/quadlets/postgresql:/var/lib/postgresql:z
+Volume=/etc/quadlets/postgresql/backup.sh:/usr/local/bin/backup.sh:z,ro
+
+# This container is part of a Pod
+Pod=postgresql.pod
+
+# Share /var/run/postgresql/ between containers in the pod for the Unix socket
+Volume=/var/run/quadlets/postgresql:/var/run/postgresql:z
+Volume=/var/lib/quadlets/postgresql/backup:/backup:z
+
+[Service]
+Restart=no
+TimeoutStartSec=600
+
+# These environment variables are sourced to be used by systemd in the Exec* commands
+EnvironmentFile=/etc/quadlets/postgresql/config.env
+
+# This container is a job - run once to completion
+Type=oneshot
+
+# Skaffold filesystem + fix permissions
+ExecStartPre=install -m 0700 -o 70 -g 70 -d /var/lib/quadlets/postgresql/backup

postgresql/postgresql-init.container

@@ -28,12 +28,13 @@ EnvironmentFile=/etc/quadlets/postgresql/config.env
 
 # Use the official entrypoint script to initialize the database
 Entrypoint=/usr/local/bin/docker-ensure-initdb.sh
-# Entrypoint=/bin/sleep
-# Exec=INF
 
 # Volume mounts
 Volume=/var/lib/quadlets/postgresql:/var/lib/postgresql:z
 
+# This container is part of a Pod
+Pod=postgresql.pod
+
 [Service]
 Restart=no
 TimeoutStartSec=30

postgresql/postgresql-server.container

@@ -41,6 +41,12 @@ HealthTimeout=10s
 HealthStartPeriod=60s
 HealthRetries=3
 
+# This container is part of a Pod
+Pod=postgresql.pod
+
+# Share /var/run/postgresql/ between containers in the pod for the Unix socket
+Volume=/var/run/quadlets/postgresql:/var/run/postgresql:z
+
 [Service]
 Restart=always
 RestartSec=10
@@ -50,5 +56,8 @@ TimeoutStopSec=30
 # These environment variables are sourced to be used by systemd in the Exec* commands
 EnvironmentFile=/etc/quadlets/postgresql/config.env
 
+# Skaffold filesystem + fix permissions
+ExecStartPre=install -m 0700 -o 70 -g 70 -d /var/run/quadlets/postgresql
+
 [Install]
 WantedBy=postgresql.target

postgresql/postgresql-upgrade.container

@@ -32,6 +32,9 @@ EnvironmentFile=/etc/quadlets/postgresql/config.env
 # Volume mounts
 Volume=/var/lib/quadlets/postgresql:/var/lib/postgresql:z
 
+# This container is part of a Pod
+Pod=postgresql.pod
+
 [Service]
 Restart=no
 TimeoutStartSec=600

postgresql/postgresql.pod

@@ -0,0 +1,17 @@
+[Unit]
+Description=PostgreSQL Database Server - Pod
+Documentation=https://hub.docker.com/_/postgres/
+After=network.target
+Before=postgresql.target
+
+# Only start if PostgreSQL has been configured
+ConditionPathExists=/etc/quadlets/postgresql/config.env
+
+# Start/stop this unit when the target is started/stopped
+PartOf=postgresql.target
+
+[Pod]
+PodName=postgresql
+
+[Install]
+WantedBy=postgresql.target

postgresql/postgresql.target

@@ -1,8 +1,8 @@
 [Unit]
 Description=PostgreSQL Service Target
 Documentation=man:systemd.target(5)
-Requires=postgresql-server.service postgresql-upgrade.service postgresql-init.service postgresql-set-major.service
+Requires=postgresql-pod.service postgresql-server.service postgresql-upgrade.service postgresql-init.service postgresql-set-major.service
-After=postgresql-server.service postgresql-upgrade.service postgresql-init.service postgresql-set-major.service
+After=postgresql-pod.service postgresql-server.service postgresql-upgrade.service postgresql-init.service postgresql-set-major.service
 
 # Allow isolation - can stop/start this target independently
 AllowIsolate=yes