first commit

Author: georgebarbarosie

.github/workflows/main.yml

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+name: build container
+on: 
+  # triggered by user action only
+  workflow_dispatch:
+    inputs:
+      PG_VERSION:
+        description: 'Postgres version'
+        required: true
+        default: '15.3'
+      EXTENSIONS:
+        description: 'Postgres extensions to install'
+        required: true
+        default: 'cron timescaledb'
+      TIMESCALEDB_VERSION:
+        description: 'TimescaleDB version'
+        required: true
+        default: '2.11.0'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: docker/setup-buildx-action@v2
+    - uses: docker/login-action@v2
+      # authenticate ghcr.io
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: calculate image tag
+      id: vars
+      run: |
+        # step 1: if exists, replace extension timescaledb with its versioned equivalent
+        export EXTENSIONS=$(echo "${{ github.event.inputs.EXTENSIONS }}" | sed 's/timescaledb/timescaledb-${{ github.event.inputs.TIMESCALEDB_VERSION }}/g s/ /-/g')
+        echo ::set-output name=IMAGE_TAG::$(echo "${{ github.event.inputs.PG_VERSION }}-${EXTENSIONS}-${{ github.event.inputs.TIMESCALEDB_VERSION }}" | tr ' ' '-')
+    - uses: docker/build-push-action@v3
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: ghcr.io/${{ github.repository }}:${{ steps.vars.outputs.IMAGE_TAG }}
+        build-args: |
+          PG_VERSION=${{ github.event.inputs.PG_VERSION }}
+          EXTENSIONS=${{ github.event.inputs.EXTENSIONS }}
+          TIMESCALEDB_VERSION=${{ github.event.inputs.TIMESCALEDB_VERSION }}

Dockerfile

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+# add extensions to cnpg postgresql image: timescaledb, pg_cron
+ARG POSTGRESQL_VERSION=15.3
+ARG EXTENSIONS="timescaledb cron"
+ARG TIMESCALEDB_VERSION=2.11.0
+
+
+FROM ghcr.io/cloudnative-pg/postgresql:${POSTGRESQL_VERSION}
+ARG EXTENSIONS
+ENV EXTENSIONS=${EXTENSIONS}
+ARG TIMESCALEDB_VERSION
+ENV TIMESCALEDB_VERSION=${TIMESCALEDB_VERSION}
+
+COPY ./install_pg_extensions.sh /
+# switch to root user to install extensions
+USER root
+RUN \
+    apt-get update && \
+    /install_pg_extensions.sh ${EXTENSIONS} && \
+    # cleanup
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /install_pg_extensions.sh
+# switch back to the postgres user
+USER postgres

install_pg_extensions.sh

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+#!/bin/bash
+set -euxo pipefail
+
+# calling syntax: install_pg_extensions.sh [extension1] [extension2] ...
+
+# install extensions
+EXTENSIONS="$@"
+# cycle through extensions list
+for EXTENSION in ${EXTENSIONS}; do
+    # is it an extension found in apt?
+    if apt-cache show "postgresql-${PG_MAJOR}-${EXTENSION}" &> /dev/null; then
+        # install the extension
+        apt-get install -y "postgresql-${PG_MAJOR}-${EXTENSION}"
+        continue
+    fi
+    
+    # special case: timescaledb
+    if [ "$EXTENSION" == "timescaledb" ]; then
+        # dependencies
+        apt-get install apt-transport-https lsb-release wget -y
+
+        # repository
+        echo "deb https://packagecloud.io/timescale/timescaledb/debian/" \
+            "$(lsb_release -c -s) main" \
+            > /etc/apt/sources.list.d/timescaledb.list
+
+        # key
+        wget --quiet -O - https://packagecloud.io/timescale/timescaledb/gpgkey \
+            | gpg --dearmor > /etc/apt/trusted.gpg.d/timescaledb.gpg
+        
+        apt-get update
+        apt-get install --yes \
+            timescaledb-tools \
+            timescaledb-toolkit-postgresql-${PG_MAJOR} \
+            timescaledb-2-loader-postgresql-${PG_MAJOR} \
+            timescaledb-2-${TIMESCALEDB_VERSION}-postgresql-${PG_MAJOR}
+
+        # cleanup
+        apt-get remove apt-transport-https lsb-release wget --auto-remove -y
+
+        continue
+    fi
+
+    # extension not found/supported
+    echo "Extension '${EXTENSION}' not found/supported"
+    exit 1
+done