feat: webhook after a successful backup

README.md

@@ -88,6 +88,8 @@ Most variables are the same as in the [official postgres image](https://hub.dock
 | POSTGRES_USER_FILE | Alternative to POSTGRES_USER, for usage with docker secrets. |
 | SCHEDULE | [Cron-schedule](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules) specifying the interval between postgres backups. Defaults to `@daily`. |
 | TZ | [POSIX TZ variable](https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html) specifying the timezone used to evaluate SCHEDULE cron (example "Europe/Paris"). |
+| WEBHOOK_EXTRA_URL | Extra arguments for the webhook. |
+| WEBHOOK_URL | URL to be called after a successful backup. |
 
 #### Special Environment Variables
 
@@ -135,3 +137,4 @@ Replace `$BACKUPFILE`, `$VERSION`, `$HOSTNAME`, `$PORT`, `$USERNAME` and `$DBNAM
 ```sh
 docker run --rm --tty --interactive -v $BACKUPFILE:/tmp/backupfile.sql.gz postgres:$VERSION /bin/sh -c "zcat /tmp/backupfile.sql.gz | psql --host=$HOSTNAME --port=$PORT --username=$USERNAME --dbname=$DBNAME -W"
 ```
+

alpine.Dockerfile

@@ -27,7 +27,9 @@ ENV POSTGRES_DB="**None**" \
     BACKUP_KEEP_WEEKS=4 \
     BACKUP_KEEP_MONTHS=6 \
     BACKUP_KEEP_MINS=1440 \
-    HEALTHCHECK_PORT=8080
+    HEALTHCHECK_PORT=8080 \
+    WEBHOOK_URL="**None**" \
+    WEBHOOK_EXTRA_ARGS=""
 
 COPY backup.sh /backup.sh
 

backup.sh

@@ -75,12 +75,15 @@ for DB in ${POSTGRES_DBS}; do
   WFILE="${BACKUP_DIR}/weekly/${WEEKLY_FILENAME}"
   MFILE="${BACKUP_DIR}/monthly/${MONTHY_FILENAME}"
   #Create dump
+  WEBHOOK=true
   if [ "${POSTGRES_CLUSTER}" = "TRUE" ]; then
     echo "Creating cluster dump of ${DB} database from ${POSTGRES_HOST}..."
     pg_dumpall -l "${DB}" ${POSTGRES_EXTRA_OPTS} | gzip > "${FILE}"
+    if [ $? - ne 0 ]; then WEBHOOK=false; fi
   else
     echo "Creating dump of ${DB} database from ${POSTGRES_HOST}..."
     pg_dump -d "${DB}" -f "${FILE}" ${POSTGRES_EXTRA_OPTS}
+    if [ $? - ne 0 ]; then WEBHOOK=false; fi
   fi
   #Copy (hardlink) for each entry
   if [ -d "${FILE}" ]; then
@@ -115,3 +118,13 @@ for DB in ${POSTGRES_DBS}; do
 done
 
 echo "SQL backup created successfully"
+
+if [ "${WEBHOOK_URL}" != "**None**" -a ${WEBHOOK} ]; then
+  echo "Execute post-backup webhook call to ${WEBHOOK_URL}"
+  curl --request POST \
+    --url ${WEBHOOK_URL} \
+    --max-time 10 \
+    --retry 5 \
+    ${WEBHOOK_EXTRA_ARGS}
+  exit 1
+fi

debian.Dockerfile

@@ -42,7 +42,9 @@ ENV POSTGRES_DB="**None**" \
     BACKUP_KEEP_WEEKS=4 \
     BACKUP_KEEP_MONTHS=6 \
     BACKUP_KEEP_MINS=1440 \
-    HEALTHCHECK_PORT=8080
+    HEALTHCHECK_PORT=8080 \
+    WEBHOOK_URL="**None**" \
+    WEBHOOK_EXTRA_ARGS=""
 
 COPY backup.sh /backup.sh