Build postgresql image with bitnami/postgres as a base image

Install required tools for doing backup operation

Signed-off-by: Prasad Ghangal <prasad.ghangal@gmail.com>

.goreleaser.yml

@@ -51,6 +51,11 @@ dockers:
   image_templates:
   - 'kanisterio/postgres-kanister-tools:{{ .Tag }}'
   dockerfile: 'docker/postgres-kanister-tools/Dockerfile'
+- image_templates:
+  - 'kanisterio/postgresql:{{ .Tag }}'
+  dockerfile: 'docker/postgresql/Dockerfile'
+  extra_files:
+  - 'docker/postgresql/run.sh'
 - binaries:
   - kando
   image_templates:

docker/postgresql/Dockerfile

@@ -0,0 +1,23 @@
+FROM bitnami/postgresql:11.5.0-debian-9-r1
+
+USER root
+
+# Explicitly set user/group IDs
+RUN useradd -r --gid=0 --uid=1001 postgres
+
+# Install required components for backup
+RUN set -x \
+	&& apt-get update \
+	&& apt-get install -y curl groff lzop pv postgresql-client python3-pip daemontools \
+	&& pip3 install --upgrade pip \
+	&& hash -r pip3 \
+	&& pip3 install wal-e[aws] \
+	&& pip3 install awscli \
+	&& (cd /usr/local/bin; curl -L https://github.com/wal-g/wal-g/releases/download/v0.1.7/wal-g.linux-amd64.tar.gz | tar -zxv)
+
+# Override base image's CMD script
+COPY docker/postgresql/run.sh /
+
+RUN chown postgres:root /run.sh
+
+USER postgres

docker/postgresql/run.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Forked from https://github.com/bitnami/bitnami-docker-postgresql/blob/master/11/debian-9/rootfs/run.sh 
+# to modify runtime args
+
+set -o errexit
+set -o nounset
+set -o pipefail
+# set -o xtrace # Uncomment this line for debugging purpose
+# shellcheck disable=SC1091
+
+# Load libraries
+. /libpostgresql.sh
+. /libos.sh
+
+# Load PostgreSQL environment variables
+eval "$(postgresql_env)"
+readonly flags=("-D" "$POSTGRESQL_DATA_DIR" "--config-file=$POSTGRESQL_CONF_FILE" "--external_pid_file=$POSTGRESQL_PID_FILE" "--hba_file=$POSTGRESQL_PGHBA_FILE" "-c" "archive_command=envdir \"${PGDATA}/env\" wal-e wal-push %p" "-c" "archive_mode=true" "-c" "archive_timeout=60" "-c" "wal_level=archive")
+readonly cmd=$(command -v postgres)
+
+info "** Starting PostgreSQL **"
+if am_i_root; then
+    exec gosu "$POSTGRESQL_DAEMON_USER" "${cmd}" "${flags[@]}"
+else
+    exec "${cmd}" "${flags[@]}"
+fi