Add granular webhooks

README.md

@@ -95,6 +95,9 @@ Most variables are the same as in the [official postgres image](https://hub.dock
 | 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_URL | URL to be called after an error or after a successful backup (POST with a JSON payload, check `hooks/00-webhook` file for more info). Default disabled. |
+| WEBHOOK_ERROR_URL | URL to be called in case backup fails. Default disabled. |
+| WEBHOOK_PRE_BACKUP_URL | URL to be called when backup starts. Default disabled. |
+| WEBHOOK_POST_BACKUP_URL | URL to be called when backup completes successfully. Default disabled. |
 | WEBHOOK_EXTRA_ARGS | Extra arguments for the `curl` execution in the webhook (check `hooks/00-webhook` file for more info). |
 
 #### Special Environment Variables

alpine.Dockerfile

@@ -30,6 +30,9 @@ ENV POSTGRES_DB="**None**" \
     BACKUP_KEEP_MINS=1440 \
     HEALTHCHECK_PORT=8080 \
     WEBHOOK_URL="**None**" \
+    WEBHOOK_ERROR_URL="**None**" \
+    WEBHOOK_PRE_BACKUP_URL="**None**" \
+    WEBHOOK_POST_BACKUP_URL="**None**" \
     WEBHOOK_EXTRA_ARGS=""
 
 COPY hooks /hooks

debian.Dockerfile

@@ -44,6 +44,9 @@ ENV POSTGRES_DB="**None**" \
     BACKUP_KEEP_MINS=1440 \
     HEALTHCHECK_PORT=8080 \
     WEBHOOK_URL="**None**" \
+    WEBHOOK_ERROR_URL="**None**" \
+    WEBHOOK_PRE_BACKUP_URL="**None**" \
+    WEBHOOK_POST_BACKUP_URL="**None**" \
     WEBHOOK_EXTRA_ARGS=""
 
 COPY hooks /hooks

hooks/00-webhook

@@ -5,9 +5,9 @@ set -e
 # Possible actions: error, pre-backup, post-backup
 ACTION="${1}"
 
-if [ "${WEBHOOK_URL}" != "**None**" ]; then
-  case "${ACTION}" in
-    "error")
+case "${ACTION}" in
+  "error")
+    if [ "${WEBHOOK_URL}" != "**None**" ]; then
       echo "Execute error webhook call to ${WEBHOOK_URL}"
       curl --request POST \
         --url "${WEBHOOK_URL}" \
@@ -16,11 +16,34 @@ if [ "${WEBHOOK_URL}" != "**None**" ]; then
         --max-time 10 \
         --retry 5 \
         ${WEBHOOK_EXTRA_ARGS}
-      ;;
-#   "pre-backup")
-#     echo "Nothing to do"
-#     ;;
-    "post-backup")
+    fi
+    if [ "${WEBHOOK_ERROR_URL}" != "**None**" ]; then
+      echo "Execute error webhook call to ${WEBHOOK_ERROR_URL}"
+      curl --request POST \
+        --url "${WEBHOOK_ERROR_URL}" \
+        --header 'Content-Type: application/json' \
+        --data '{"status": "error"}' \
+        --max-time 10 \
+        --retry 5 \
+        ${WEBHOOK_EXTRA_ARGS}
+    fi
+  ;;
+
+  "pre-backup")
+    if [ "${WEBHOOK_PRE_BACKUP_URL}" != "**None**" ]; then
+      echo "Execute pre-backup webhook call to ${WEBHOOK_PRE_BACKUP_URL}"
+      curl --request POST \
+        --url "${WEBHOOK_PRE_BACKUP_URL}" \
+        --header 'Content-Type: application/json' \
+        --data '{"status": "pre-backup"}' \
+        --max-time 10 \
+        --retry 5 \
+        ${WEBHOOK_EXTRA_ARGS}
+    fi
+  ;;
+
+  "post-backup")
+    if [ "${WEBHOOK_URL}" != "**None**" ]; then
       echo "Execute post-backup webhook call to ${WEBHOOK_URL}"
       curl --request POST \
         --url "${WEBHOOK_URL}" \
@@ -29,6 +52,16 @@ if [ "${WEBHOOK_URL}" != "**None**" ]; then
         --max-time 10 \
         --retry 5 \
         ${WEBHOOK_EXTRA_ARGS}
-      ;;
-  esac
-fi
+    fi
+    if [ "${WEBHOOK_POST_BACKUP_URL}" != "**None**" ]; then
+      echo "Execute post-backup webhook call to ${WEBHOOK_POST_BACKUP_URL}"
+      curl --request POST \
+        --url "${WEBHOOK_POST_BACKUP_URL}" \
+        --header 'Content-Type: application/json' \
+        --data '{"status": "post-backup"}' \
+        --max-time 10 \
+        --retry 5 \
+        ${WEBHOOK_EXTRA_ARGS}
+    fi
+  ;;
+esac