Add support for PostgreSQL 16, drop 11 (#39)

* Add support for PostgreSQL 16

This requires Alpine 3.19

* Drop support for PostgreSQL 11

Version 11 has reached end-of-life (EOL)
https://www.postgresql.org/support/versioning/

* Install aws-cli via apk instead of pip3

This removes python3 and py3-pip as explicit dependencies.
Python is still installed as a derived dependency.

This fixes building on Alpine 3.19

.github/workflows/build-and-push-images.yml

@@ -11,11 +11,11 @@ jobs:
     strategy:
       matrix:
         include:
-          - { postgres: 11, alpine: '3.10' }
           - { postgres: 12, alpine: '3.12' }
           - { postgres: 13, alpine: '3.14' }
           - { postgres: 14, alpine: '3.16' }
           - { postgres: 15, alpine: '3.17' }
+          - { postgres: 16, alpine: '3.19' }
 
     steps:
       - name: Checkout repository

README.md

@@ -6,13 +6,13 @@ This project provides Docker images to periodically back up a PostgreSQL databas
 ```yaml
 services:
   postgres:
-    image: postgres:13
+    image: postgres:16
     environment:
       POSTGRES_USER: user
       POSTGRES_PASSWORD: password
 
   backup:
-    image: eeshugerman/postgres-backup-s3:15
+    image: eeshugerman/postgres-backup-s3:16
     environment:
       SCHEDULE: '@weekly'     # optional
       BACKUP_KEEP_DAYS: 7     # optional
@@ -28,7 +28,7 @@ services:
       POSTGRES_PASSWORD: password
 ```
 
-- Images are tagged by the major PostgreSQL version supported: `11`, `12`, `13`, `14`, or `15`.
+- Images are tagged by the major PostgreSQL version supported: `12`, `13`, `14`, `15` or `16`.
 - The `SCHEDULE` variable determines backup frequency. See go-cron schedules documentation [here](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules). Omit to run the backup immediately and then exit.
 - If `PASSPHRASE` is provided, the backup will be encrypted using GPG.
 - Run `docker exec <container name> sh backup.sh` to trigger a backup ad-hoc.

src/install.sh

@@ -11,9 +11,7 @@ apk add postgresql-client
 # install gpg
 apk add gnupg
 
-apk add python3
-apk add py3-pip  # separate package on edge only
-pip3 install awscli
+apk add aws-cli
 
 # install go-cron
 apk add curl