configure jenkinsfile

Jenkinsfile

@@ -0,0 +1,68 @@
+def image_name = "dpedu/photolib"
+
+pipeline {
+    agent {
+        kubernetes {
+            yaml """
+apiVersion: v1
+kind: Pod
+spec:
+  podAntiAffinity:
+    preferredDuringSchedulingIgnoredDuringExecution:  # avoid nodes already running a jenkins job
+    - podAffinityTerm:
+        labelSelector:
+          matchExpressions:
+          - key: jenkins
+            operator: In
+            values:
+            - slave
+        topologyKey: node
+  containers:
+  - name: docker
+    image: docker:20-dind
+    args:
+      - "--insecure-registry"
+      - "dockermirror:5000"
+    securityContext:
+      privileged: true
+"""
+        }
+    }
+    stages {
+        stage("Build image") {
+            steps {
+                container("docker") {
+                    script {
+                        try {
+                            docker.withRegistry('http://dockermirror:5000') {
+                                docker.image("ubuntu:focal").pull()
+                                docker.image(image_name).pull() // Pull a recent version to share base layers with (?)
+                            }
+                        } catch (exc) {
+                            echo "couldn't pull image, assuming we're building it for the first time"
+                        }
+                        docker.build(image_name)
+                    }
+                }
+            }
+        }
+        stage("Push image") {
+            steps {
+                container("docker") {
+                    script {
+                        docker.withRegistry('http://dockermirror:5000') {
+                            docker.image(image_name).push("latest")
+                        }
+                    }
+                }
+            }
+        }
+        stage("Show images") {
+            steps {
+                container("docker") {
+                    sh 'docker images'
+                }
+            }
+        }
+    }
+}