From 7797da19f941f90432869f0b420ccb8a789222e2 Mon Sep 17 00:00:00 2001
From: "Dustin C. Hatch" <dustin@hatch.name>
Date: Sun, 22 Oct 2023 21:50:25 -0500
Subject: [PATCH] jenkins: Add Argo CD pre-sync hook

Argo CD will delete and re-create this Job each time it synchronizes the
*jenkins* application.  The job creates a snapshot of the Jenkins volume
using an HTTP request to the Longhorn UI.
---
 jenkins/argocd-sync-hook.yaml | 25 +++++++++++++++++++++++++
 jenkins/kustomization.yaml    |  1 +
 2 files changed, 26 insertions(+)
 create mode 100644 jenkins/argocd-sync-hook.yaml

diff --git a/jenkins/argocd-sync-hook.yaml b/jenkins/argocd-sync-hook.yaml
new file mode 100644
index 0000000..9c0fc29
--- /dev/null
+++ b/jenkins/argocd-sync-hook.yaml
@@ -0,0 +1,25 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: jenkins-snapshot-hook
+  namespace: jenkins
+  annotations:
+    argocd.argoproj.io/hook: PreSync
+    argocd.argoproj.io/hook-delete-policy: BeforeHookCreation
+spec:
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: jenkins-snapshot-hook
+    spec:
+      containers:
+      - name: jenkins-snapshot
+        image: docker.io/curlimages/curl
+        command:
+        - curl
+        - http://longhorn-frontend.longhorn-system/v1/volumes/pvc-4d42f4d3-2f9d-4edd-b82c-b51a385a3276?action=snapshotCreate
+        - -H
+        - 'Content-Type: application/json'
+        - -d
+        - '{}'
+      restartPolicy: Never
diff --git a/jenkins/kustomization.yaml b/jenkins/kustomization.yaml
index d8e2dd5..2018765 100644
--- a/jenkins/kustomization.yaml
+++ b/jenkins/kustomization.yaml
@@ -7,6 +7,7 @@ labels:
 
 resources:
 - jenkins.yaml
+- argocd-sync-hook.yaml
 
 configMapGenerator:
 - name: ssh-known-hosts