Postgres image.

.gitlab-ci.yml

@@ -179,3 +179,19 @@ push-youtube-dl:
   needs:
     - job: build-youtube-dl
       artifacts: true
+
+# postgres image:
+
+build-postgres:
+  extends: .container-build
+  variables:
+    CONTEXT: postgres
+
+push-postgres:
+  extends: .container-push
+  variables:
+    CONTEXT: postgres
+    IMAGE: postgres
+  needs:
+    - job: build-postgres
+      artifacts: true

.pre-commit-config.yaml

@@ -66,6 +66,7 @@ repos:
     rev: v0.2.0
     hooks:
       - id: shell-validate
+        exclude: postgres/healthcheck
 
   - repo: https://github.com/AleksaC/hadolint-py.git
     rev: v2.8.0

postgres/Dockerfile

+FROM docker.io/postgres:14-alpine
+COPY --chown=root:root healthcheck /usr/local/bin/
+HEALTHCHECK --start-period=3m CMD healthcheck

postgres/README.md

+# postgres
+
+Just the upstream image but with a healthcheck.

postgres/healthcheck

+#!/usr/bin/env bash
+set -eo pipefail
+
+host="$(hostname -i || echo '127.0.0.1')"
+user="${POSTGRES_USER:-postgres}"
+db="${POSTGRES_DB:-$POSTGRES_USER}"
+export PGPASSWORD="${POSTGRES_PASSWORD:-}"
+
+args=(
+	# force postgres to not use the local unix socket (test "external" connectibility)
+	--host "$host"
+	--username "$user"
+	--dbname "$db"
+	--quiet --no-align --tuples-only
+)
+
+if select="$(echo 'SELECT 1' | psql "${args[@]}")" && [ "$select" = '1' ]; then
+	exit 0
+fi
+
+exit 1