Setup semaphore

.semaphore/pipeline_2.yml

@@ -0,0 +1,37 @@
+version: v1.0
+name: Pipeline 2
+agent:
+  machine:
+    type: e1-standard-2
+    os_image: ubuntu1804
+blocks:
+  - name: Docker-login-pull
+    task:
+      jobs:
+        - name: docker-login
+          commands:
+            - 'echo "${DOCKER_PASSWORD}" | docker login -u "${DOCKER_USERNAME}" --password-stdin'
+            - 'docker pull $DOCKER_USERNAME/helloworld:$SEMAPHORE_WORKFLOW_ID'
+      secrets:
+        - name: Docker Secrets
+  - name: Deploy
+    task:
+      secrets:
+        - name: Docker Secrets
+        - name: Digital Ocean Secret
+      env_vars:
+        - name: CLUSTER_NAME
+          value: test-kubernetes
+      prologue:
+        commands:
+          - doctl auth init --access-token $DO_ACCESS_TOKEN
+          - 'doctl kubernetes cluster kubeconfig save "${CLUSTER_NAME}"'
+          - checkout
+      jobs:
+        - name: Canary Deployment
+          commands:
+            - chmod 600 ./apply.sh
+            - chmod a+x ./apply.sh
+            - kubectl apply -f manifests/service.yml
+            - './apply.sh manifests/deployment.yml helloworld-canary 1 '
+            - if kubectl get deployment helloworld-stable; then kubectl scale --replicas=1 deployment/helloworld-stable; fi

.semaphore/pipeline_3.yml

@@ -0,0 +1,13 @@
+version: v1.0
+name: Pipeline 3
+agent:
+  machine:
+    type: e1-standard-2
+    os_image: ubuntu1804
+blocks:
+  - name: 'Block #1'
+    task:
+      jobs:
+        - name: 'Job #1'
+          commands:
+            - echo "job 1"

.semaphore/pipeline_4.yml

@@ -0,0 +1,13 @@
+version: v1.0
+name: Pipeline 4
+agent:
+  machine:
+    type: e1-standard-2
+    os_image: ubuntu1804
+blocks:
+  - name: 'Block #1'
+    task:
+      jobs:
+        - name: 'Job #1'
+          commands:
+            - echo "job 1"

.semaphore/semaphore.yml

@@ -0,0 +1,32 @@
+version: v1.0
+name: Initial Pipeline
+agent:
+  machine:
+    type: e1-standard-2
+    os_image: ubuntu1804
+blocks:
+  - name: Hello world
+    task:
+      jobs:
+        - name: Build app
+          commands:
+            - 'echo "${DOCKER_PASSWORD}" | docker login -u "${DOCKER_USERNAME}" --password-stdin'
+            - checkout
+            - docker-compose build
+            - docker image ls
+            - 'docker tag hello-world:latest "$DOCKER_USERNAME"/helloworld:latest'
+            - 'docker tag hello-world:latest "$DOCKER_USERNAME"/helloworld:$SEMAPHORE_WORKFLOW_ID'
+            - 'docker push "$DOCKER_USERNAME"/helloworld:latest'
+            - 'docker push "$DOCKER_USERNAME"/helloworld:$SEMAPHORE_WORKFLOW_ID'
+            - docker images
+      secrets:
+        - name: Docker Secrets
+promotions:
+  - name: Canary
+    pipeline_file: pipeline_2.yml
+    auto_promote:
+      when: (branch = 'setup-semaphore' OR tag =~ '^hotfix*') AND result = 'passed'
+  - name: Stable
+    pipeline_file: pipeline_3.yml
+  - name: Rollback
+    pipeline_file: pipeline_4.yml

apply.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# apply a kubernetes manifest and wait for rollout
+#
+# usage:
+#   apply.sh manifest/DEPLOYMENT_FILE.yml DEPLOYMENT_NAME REPLICAS IMAGE
+#
+# example:
+#   apply.sh manifest/deployment.yml addressbook-stable 3 $DOCKER_USERNAME/semaphore-demo-cicd-kubernetes:latest
+#
+
+set -e
+
+export manifest=$1
+export deployment=$2
+export replicas=$3
+export img=$4
+
+apply_tmp=$(mktemp)
+cat $manifest | envsubst | tee $apply_tmp
+kubectl apply -f $apply_tmp
+kubectl rollout status -f $apply_tmp --timeout=120s
+rm -f $apply_tmp

docker-compose.yml

@@ -0,0 +1,14 @@
+version: '3.7'
+
+services:
+  hello-world:
+    image: hello-world
+    container_name: hello-world-container
+    build:
+      context: .
+      dockerfile: Dockerfile
+    ports:
+      - 5001:5000
+    environment:
+      #- FLASK_APP=app/__init__.py
+      - FLASK_ENV=development

manifests/deployment.yml

@@ -0,0 +1,25 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: $deployment
+spec:
+  replicas: $replicas
+  selector:
+    matchLabels:
+      app: helloworld
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 1
+  template:
+    metadata:
+      labels:
+        app: helloworld
+        deployment: $deployment
+    spec:
+      imagePullSecrets:
+      - name: dockerhub
+      containers:
+      - name:  hello-world-container
+        image: $DOCKER_USERNAME/helloworld:$SEMAPHORE_WORKFLOW_ID

manifests/service.yml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: helloworld-app
+spec:
+  selector:
+    app: helloworld
+  ports:
+    - port: 80
+      targetPort: 5000