ci: add slack notfications

This sends a message to a slack channel if a scheduled pipeline is
ran and reports either failure or success.

.gitlab-ci.yml

@@ -236,6 +236,25 @@ API:
         INTERNAL_NETWORK: ["true"]
         DISTRO_CODE: ["rhel_90"]
 
+NIGHTLY_FAIL:
+  stage: finish
+  tags:
+    - shell
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+      when: on_failure
+  script:
+    - schutzbot/slack_notification.sh FAILED ":big-sad:"
+
+NIGHTLY_SUCCESS:
+  stage: finish
+  tags:
+    - shell
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+  script:
+    - schutzbot/slack_notification.sh SUCCESS ":partymeow:"
+
 # Installer:
 #   stage: test
 #   extends: .terraform

schutzbot/slack_notification.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -eux
+
+COMPOSE_ID=$(cat COMPOSE_ID)
+MESSAGE="\"Nightly pipeline execution on *$COMPOSE_ID* finished with status *$1* $2 \n Link to results: $CI_PIPELINE_URL \""
+
+curl \
+    -X POST \
+    -H 'Content-type: application/json' \
+    --data '{"text": "test", "blocks": [ { "type": "section", "text": {"type": "mrkdwn", "text":'"$MESSAGE"'}}]}' \
+    "$SLACK_WEBHOOK_URL"

tools/define-compose-url.sh

@@ -8,7 +8,7 @@ COMPOSE_ID=$(cat COMPOSE_ID)
 COMPOSE_URL="${COMPOSE_URL:-http://download.devel.redhat.com/rhel-8/nightly/RHEL-8/$COMPOSE_ID}"
 
 # in case COMPOSE_URL was defined from the outside refresh COMPOSE_ID file,
-# used for telegram messages in case of success/failure
+# used for slack messages in case of success/failure
 curl -L "$COMPOSE_URL/COMPOSE_ID" > COMPOSE_ID
 
 # Make sure the compose URL really exists