Install fuse to allow "restic mount"

disable tests

Dockerfile

@@ -1,30 +1,28 @@
-FROM alpine:3.10.1 as build
-RUN apk add --no-cache ca-certificates
+FROM alpine:latest as rclone
 
-# Get restic executable
-ENV RESTIC_VERSION=0.9.5
-ADD https://github.com/restic/restic/releases/download/v${RESTIC_VERSION}/restic_${RESTIC_VERSION}_linux_amd64.bz2 /
-RUN bzip2 -d restic_${RESTIC_VERSION}_linux_amd64.bz2 && mv restic_${RESTIC_VERSION}_linux_amd64 /bin/restic && chmod +x /bin/restic
+# Get rclone executable
+ADD https://downloads.rclone.org/rclone-current-linux-amd64.zip /
+RUN unzip rclone-current-linux-amd64.zip && mv rclone-*-linux-amd64/rclone /bin/rclone && chmod +x /bin/rclone
 
-FROM alpine:3.10.1
+FROM restic/restic:0.9.6
 
-COPY --from=build /etc/ssl/certs /etc/ssl/certs
-COPY --from=build /bin/restic /bin/restic
+# install mailx
+RUN apk add --update --no-cache heirloom-mailx fuse
 
-RUN apk add --update --no-cache fuse openssh-client
+COPY --from=rclone /bin/rclone /bin/rclone
 
 RUN \
     mkdir -p /mnt/restic /var/spool/cron/crontabs /var/log; \
     touch /var/log/cron.log;
 
-ENV \
-    RESTIC_REPOSITORY=/mnt/restic \
-    RESTIC_PASSWORD="" \
-    RESTIC_TAG="" \
-    NFS_TARGET="" \
-    BACKUP_CRON="0 */6 * * *" \
-    RESTIC_FORGET_ARGS="" \
-    RESTIC_JOB_ARGS=""
+ENV RESTIC_REPOSITORY=/mnt/restic
+ENV RESTIC_PASSWORD=""
+ENV RESTIC_TAG=""
+ENV NFS_TARGET=""
+ENV BACKUP_CRON="0 */6 * * *"
+ENV RESTIC_FORGET_ARGS=""
+ENV RESTIC_JOB_ARGS=""
+ENV MAILX_ARGS=""
 
 # /data is the dir where you have to put the data to be backed up
 VOLUME /data

README.md

@@ -60,7 +60,7 @@ docker logs
 ```
 Shows `/var/log/cron.log`
 
-Additionally you can see the the full log, including restic output, of the last execution in `/var/log/backup-last.log`. When the backup fails the log is copied to `/var/log/restic-error-last.log`.
+Additionally you can see the the full log, including restic output, of the last execution in `/var/log/backup-last.log`. When the backup fails the log is copied to `/var/log/restic-error-last.log`. If configured, you can find the full output of the mail notification in `/var/log/mail-last.log`.
 
 # Customize the Container
 
@@ -77,6 +77,7 @@ The container is setup by setting [environment variables](https://docs.docker.co
 * `RESTIC_JOB_ARGS` - Optional. Allows to specify extra arguments to the back up job such as limiting bandwith with `--limit-upload` or excluding file masks with `--exclude`.
 * `AWS_ACCESS_KEY_ID` - Optional. When using restic with AWS S3 storage.
 * `AWS_SECRET_ACCESS_KEY` - Optional. When using restic with AWS S3 storage.
+* `MAILX_ARGS` - Optional. If specified, the content of `/var/log/backup-last.log` is sent via mail after each backup using an *external SMTP*. To have maximum flexibility, you have to specify the mail/smtp parameters by your own. Have a look at the [mailx manpage](https://linux.die.net/man/1/mailx) for further information. Example value: `-e "MAILX_ARGS=-r 'from@example.de' -s 'Result of the last restic backup run' -S smtp='smtp.example.com:587' -S smtp-use-starttls -S smtp-auth=login -S smtp-auth-user='username' -S smtp-auth-password='password' 'to@example.com'"`.
 
 ## Volumes
 
@@ -86,9 +87,9 @@ The container is setup by setting [environment variables](https://docs.docker.co
 
 Since restic saves the hostname with each snapshot and the hostname of a docker container is derived from it's id you might want to customize this by setting the hostname of the container to another value.
 
-Either by setting the [environment variable](https://docs.docker.com/engine/reference/run/#env-environment-variables) `HOSTNAME` or with `--hostname` in the [network settings](https://docs.docker.com/engine/reference/run/#network-settings)
+Set `--hostname` in the [network settings](https://docs.docker.com/engine/reference/run/#network-settings)
 
-## Backup to SFTP
+## Backup via SFTP
 
 Since restic needs a **password less login** to the SFTP server make sure you can do `sftp user@host` from inside the container. If you can do so from your host system, the easiest way is to just mount your `.ssh` folder conaining the authorized cert into the container by specifying `-v ~/.ssh:/root/.ssh` as argument for `docker run`.
 
@@ -98,6 +99,10 @@ Now you can simply specify the restic repository to be an [SFTP repository](http
 -e "RESTIC_REPOSITORY=sftp:user@host:/tmp/backup"
 ```
 
+## Backup via rclone
+
+To use rclone as a backend for restic, simply add the rclone config file as a volume with `-v /absolute/path/to/rclone.conf:/root/.config/rclone/rclone.conf`.
+
 # Versioning & Changelog
 
 Starting from v1.3.0 versioning follows [Semantic versioning](http://semver.org/)

backup.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 lastLogfile="/var/log/backup-last.log"
+lastMailLogfile="/var/log/mail-last.log"
 
 copyErrorLog() {
   cp ${lastLogfile} /var/log/backup-error-last.log
@@ -11,7 +12,7 @@ logLast() {
 }
 
 start=`date +%s`
-rm -f ${lastLogfile}
+rm -f ${lastLogfile} ${lastMailLogfile}
 echo "Starting Backup at $(date +"%Y-%m-%d %H:%M:%S")"
 echo "Starting Backup at $(date)" >> ${lastLogfile}
 logLast "BACKUP_CRON: ${BACKUP_CRON}"
@@ -50,3 +51,12 @@ fi
 
 end=`date +%s`
 echo "Finished Backup at $(date +"%Y-%m-%d %H:%M:%S") after $((end-start)) seconds"
+
+if [ -n "${MAILX_ARGS}" ]; then
+    sh -c "mailx -v -S sendwait ${MAILX_ARGS} < ${lastLogfile} > ${lastMailLogfile} 2>&1"
+    if [ $? == 0 ]; then
+        echo "Mail notification successfully sent."
+    else
+        echo "Sending mail notification FAILED. Check ${lastMailLogfile} for further information."
+    fi
+fi

config-broken.yml

@@ -18,4 +18,4 @@ fileExistenceTests:
 metadataTest:
   volumes: ["/data"]
   entrypoint: ["/entry.sh"]
-  cmd: ["tail","-fn0", "/var/log/cron.log"]
+  cmd: ["tail","-fn0", "/var/log/cron.log"]

docker-compose.test.broken.yml

@@ -1,9 +1,9 @@
 version: '2'
 
 services:
-  test:
+  sut:
     image: gcr.io/gcp-runtimes/container-structure-test
     command: ["test", "--image", "restic-backup", "--config", "config.yml"]
     volumes:
       - ./config.yml:/config.yml
-      - /var/run/docker.sock:/var/run/docker.sock
+      - /var/run/docker.sock:/var/run/docker.sock

run.sh

@@ -7,7 +7,7 @@ echo "Start backup-test container. Backup of ~/test-data/ to repository ~/test-r
 docker run --privileged --name backup-test \
 -e "RESTIC_PASSWORD=test" \
 -e "RESTIC_TAG=test" \
--e "BACKUP_CRON=0 0 * * *" \
+-e "BACKUP_CRON=* * * * *" \
 -e "RESTIC_FORGET_ARGS=--keep-last 10" \
 -v ~/test-data:/data \
 -v ~/test-repo/:/mnt/restic \