Updated to use postgres image.

Dockerfile

@@ -1,8 +1,10 @@
-FROM alpine:3.4
-MAINTAINER Pau Rodriguez-Estivill "prodrigestivill@gmail.com"
+FROM postgres
 
-ADD install.sh install.sh
-RUN sh install.sh && rm install.sh
+RUN set -x \
+	&& apt-get update && apt-get install -y --no-install-recommends ca-certificates curl && rm -rf /var/lib/apt/lists/* \
+	&& curl -L https://github.com/odise/go-cron/releases/download/v0.0.7/go-cron-linux.gz | zcat > /usr/local/bin/go-cron \
+	&& chmod a+x /usr/local/bin/go-cron \
+	&& apt-get purge -y --auto-remove ca-certificates && apt-get clean
 
 ENV POSTGRES_DB **None**
 ENV POSTGRES_HOST **None**
@@ -10,13 +12,18 @@ ENV POSTGRES_PORT 5432
 ENV POSTGRES_USER **None**
 ENV POSTGRES_PASSWORD **None**
 ENV POSTGRES_EXTRA_OPTS '-Z9'
-ENV SCHEDULE **None**
+ENV SCHEDULE '@daily'
 ENV BACKUP_DIR '/backups'
 ENV BACKUP_KEEP_DAYS 7
 ENV BACKUP_KEEP_WEEKS 4
 ENV BACKUP_KEEP_MONTHS 6
 
-ADD run.sh run.sh
-ADD backup.sh backup.sh
+COPY backup.sh /backup.sh
 
-CMD ["sh", "run.sh"]
+VOLUME /backups
+
+ENTRYPOINT ["/bin/sh", "-c"]
+CMD ["exec /usr/local/bin/go-cron -s \"$SCHEDULE\" -p 80 -- /backup.sh"]
+
+HEALTHCHECK --interval=5m --timeout=3s \
+  CMD curl -f http://localhost/ || exit 1

README.md

@@ -7,34 +7,39 @@ Based on [schickling/postgres-backup-s3](https://hub.docker.com/r/schickling/pos
 
 Docker:
 ```sh
-$ docker run -e BACKUP_DIR=/backups -e POSTGRES_DATABASE=dbname -e POSTGRES_USER=user -e POSTGRES_PASSWORD=password -e POSTGRES_HOST=localhost schickling/postgres-backup-local
+$ docker run -e POSTGRES_HOST=postgres -e POSTGRES_DB=dbname -e POSTGRES_USER=user -e POSTGRES_PASSWORD=password  prodrigestivill/postgres-backup-local /backup.sh
 ```
 
 Docker Compose:
 ```yaml
-postgres:
-  image: postgres
-  environment:
-    POSTGRES_DB: dbname
-    POSTGRES_USER: user
-    POSTGRES_PASSWORD: password
-
-pgbackups:
-  image: prodrigestivill/postgres-backup-local
-  links:
-    - postgres
-  volumes:
-    - /var/opt/pgbackups:/backups
-  environment:
-    SCHEDULE: '@daily'
-    BACKUP_DIR: /backups
-    BACKUP_KEEP_DAYS: 7
-    BACKUP_KEEP_WEEKS: 4
-    BACKUP_KEEP_MONTHS: 6
-    POSTGRES_DB: dbname
-    POSTGRES_USER: user
-    POSTGRES_PASSWORD: password
-    POSTGRES_EXTRA_OPTS: '-Z9 --schema=public --blobs'
+version: '2'
+services:
+    postgres:
+        image: postgres
+        restart: always
+        environment:
+            - POSTGRES_DB=database
+            - POSTGRES_USER=username
+            - POSTGRES_PASSWORD=password
+    pgbackups:
+        image: prodrigestivill/postgres-backup-local
+        restart: always
+        volumes:
+            - /var/opt/pgbackups:/backups
+        links:
+            - postgres
+        depends_on:
+            - postgres
+        environment:
+            - POSTGRES_HOST=postgres
+            - POSTGRES_DB=database
+            - POSTGRES_USER=username
+            - POSTGRES_PASSWORD=password
+            - POSTGRES_EXTRA_OPTS=-Z9 --schema=public --blobs
+            - SCHEDULE=@daily
+            - BACKUP_KEEP_DAYS=7
+            - BACKUP_KEEP_WEEKS=4
+            - BACKUP_KEEP_MONTHS=6
 ```
 
 ### Automatic Periodic Backups

backup.sh

@@ -1,7 +1,6 @@
 #! /bin/sh
 
 set -e
-set -o pipefail
 
 if [ "${POSTGRES_DB}" = "**None**" ]; then
   echo "You need to set the POSTGRES_DB environment variable."

install.sh

@@ -1,18 +0,0 @@
-#! /bin/sh
-
-# exit if a command fails
-set -e
-
-apk update
-
-# install pg_dump
-apk add postgresql
-
-# install go-cron
-apk add curl
-curl -L https://github.com/odise/go-cron/releases/download/v0.0.6/go-cron-linux.gz | zcat > /usr/local/bin/go-cron
-chmod u+x /usr/local/bin/go-cron
-apk del curl
-
-# cleanup
-rm -rf /var/cache/apk/*

run.sh

@@ -1,9 +0,0 @@
-#! /bin/sh
-
-set -e
-
-if [ "${SCHEDULE}" = "**None**" ]; then
-  sh backup.sh
-else
-  exec go-cron "$SCHEDULE" /bin/sh backup.sh
-fi