Merge pull request #94 from g-nardiello/feature-healthcheck

[Feature] Add basic healthcheck

Author: fradelg

Dockerfile

@@ -41,4 +41,7 @@ RUN mkdir /backup && \
 
 VOLUME ["/backup"]
 
-CMD dockerize -wait tcp://${MYSQL_HOST}:${MYSQL_PORT} -timeout ${TIMEOUT} /run.sh
+HEALTHCHECK --interval=2s --retries=1800 \
+	CMD stat /HEALTHY.status || exit 1
+
+ENTRYPOINT dockerize -wait tcp://${MYSQL_HOST}:${MYSQL_PORT} -timeout ${TIMEOUT} /run.sh

README.md

@@ -13,6 +13,12 @@ docker container run -d \
        fradelg/mysql-cron-backup
 ```
 
+### Healthcheck
+
+
+Healthcheck is provided as a basic init control.
+Container is **Healthy** after the database init phase, that is after `INIT_BACKUP` or `INIT_RESTORE_LATEST` happends without check if there is an error, **Starting** otherwise. Not other checks are actually provided.
+
 ## Variables
 
 

run.sh

@@ -28,6 +28,8 @@ if [ -n "${EXIT_BACKUP}" ]; then
   trap final_backup SIGHUP SIGINT SIGTERM
 fi
 
+touch /HEALTHY.status
+
 echo "${CRON_TIME} /backup.sh >> /mysql_backup.log 2>&1" > /tmp/crontab.conf
 crontab /tmp/crontab.conf
 echo "=> Running cron task manager in foreground"