Initial implementation

.dockerignore

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+.git
+.idea
+*.iml
+.editorconfig
+build-harness
+.build-harness

.editorconfig

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+# Override for Makefile
+[{Makefile, makefile, GNUmakefile}]
+indent_style = tab
+indent_size = 4
+
+[Makefile.*]
+indent_style = tab
+indent_size = 4
+
+[*.yaml]
+indent_style = spaces
+indent_size = 2

.gitignore

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+release/*
+.build-harness
+build-harness/
+.idea
+*.iml

Dockerfile

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+FROM golang:alpine3.8 AS builder
+
+# Copy source into builder
+ADD . /src
+
+# Build the app
+RUN cd /src && \
+    go build -o example-app
+
+# Build the final image
+FROM alpine:3.8 as final
+
+# Install the cloudposse alpine repository
+ADD https://apk.cloudposse.com/ops@cloudposse.com.rsa.pub /etc/apk/keys/
+RUN echo "@cloudposse https://apk.cloudposse.com/3.8/vendor" >> /etc/apk/repositories
+RUN apk add --update bash variant@cloudposse
+
+# Expose port of the app
+EXPOSE 8080
+
+# Set the runtime working directory
+WORKDIR /app
+
+# Copy the helmfile deployment configuration
+COPY deploy/ /deploy/
+COPY public/ /app/public/
+
+# Install the app
+COPY --from=builder /src/example-app /app/
+
+# Define the entrypoint
+ENTRYPOINT ["./example-app"]

Makefile

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+DOCKER_IMAGE_NAME ?= example-app
+SHELL = /bin/bash
+
+PATH:=$(PATH):$(GOPATH)/bin
+
+-include $(shell curl -sSL -o .build-harness "https://git.io/build-harness"; echo .build-harness)
+
+build: go/build
+	@exit 0
+
+run:
+	docker run -it -p 8080:8080 --rm $(DOCKER_IMAGE_NAME)

README.md

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 # example-app
-Example application for CI/CD demonstrations
+
+Example application for Codefresh CI/CD demonstrations.
+
+Contact <hello@cloudposse.com>

codefresh/build.yaml

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+version: '1.0'
+
+stages:
+  - Prepare
+  - Build
+  - Push
+
+steps:
+  main_clone:
+    title: "Clone repository"
+    type: git-clone
+    stage: Prepare
+    description: "Initialize"
+    repo: ${{CF_REPO_OWNER}}/${{CF_REPO_NAME}}
+    git: CF-default
+    revision: ${{CF_REVISION}}
+
+  build_image:
+    title: Build image
+    stage: Build
+    type: build
+    description: Build image
+    image_name: ${{CF_REPO_NAME}}
+    dockerfile: Dockerfile
+
+  push_image_commit:
+    title: Push image with commit tag
+    stage: Push
+    type: push
+    candidate: ${{build_image}}
+    tags:
+    - "${{CF_REVISION}}"

codefresh/deploy.yaml

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+version: '1.0'
+
+stages:
+  - Prepare
+  - Deploy
+
+steps:
+  main_clone:
+    title: "Create Context"
+    stage: Prepare
+    image: alpine
+    commands:
+    - cf_export NAMESPACE=${{STAGE}}
+    - cf_export IMAGE_NAME=${{CF_DOCKER_REPO_URL}}/${{CF_REPO_NAME}}
+    - cf_export IMAGE_TAG=${{CF_RELEASE_TAG}}
+
+  set_github_deployment_status_to_pending:
+    title: Set GitHub deployment status to "pending"
+    stage: Deploy
+    image: cloudposse/github-status-updater
+    environment:
+    - GITHUB_ACTION=update_state
+    - GITHUB_TOKEN=${{GITHUB_TOKEN}}
+    - GITHUB_OWNER=${{CF_REPO_OWNER}}
+    - GITHUB_REPO=${{CF_REPO_NAME}}
+    - GITHUB_REF=${{CF_REVISION}}
+    - GITHUB_CONTEXT=${{STAGE}}-environment
+    - GITHUB_STATE=pending
+    - GITHUB_DESCRIPTION=Deploying changes to ${{NAMESPACE}} namespace
+    - GITHUB_TARGET_URL=${{ATLANTIS_ATLANTIS_URL}}
+    when:
+      condition:
+        all:
+          githubNotificationsEnabled: "'${{GITHUB_NOTIFICATIONS_ENABLED}}' == 'true'"
+
+  deploy_helmfile:
+    title: "Deploy with helmfile"
+    stage: "Deploy"
+    image: "${{CF_DOCKER_REPO_URL}}/${{CF_REPO_NAME}}:${{CF_REVISION}}"
+    working_directory: /deploy/
+    commands:
+    # Announce the release version
+    - "echo 'Preparing to deploy version ${{CF_RELEASE_TAG}}'"
+    # Fetch the build-harness
+    - "curl -sSL -o Makefile https://git.io/build-harness"
+    # Initialize the build-harness
+    - "make init"
+    # Install or upgrade tiller
+    - "make helm/toolbox/upsert"
+    # Deploy chart to cluster using helmfile
+    - "helmfile --namespace ${{NAMESPACE}} --selector color=blue sync"
+
+  set_github_deployment_status_to_success:
+    title: Set GitHub deployment status to "success"
+    stage: "Deploy"
+    image: cloudposse/github-status-updater
+    environment:
+    - GITHUB_ACTION=update_state
+    - GITHUB_TOKEN=${{GITHUB_TOKEN}}
+    - GITHUB_OWNER=${{CF_REPO_OWNER}}
+    - GITHUB_REPO=${{CF_REPO_NAME}}
+    - GITHUB_REF=${{CF_REVISION}}
+    - GITHUB_CONTEXT=${{STAGE}}-environment
+    - GITHUB_STATE=success
+    - GITHUB_DESCRIPTION=Deployed to ${{NAMESPACE}} namespace
+    - GITHUB_TARGET_URL=${{ATLANTIS_ATLANTIS_URL}}
+    when:
+      condition:
+        all:
+          githubNotificationsEnabled: "'${{GITHUB_NOTIFICATIONS_ENABLED}}' == 'true'"

codefresh/release.yaml

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+version: '1.0'
+
+stages:
+  - Prepare
+  - Promote
+  - Deploy
+
+steps:
+  main_clone:
+    title: "Create Context"
+    stage: "Prepare"
+    image: alpine
+    commands:
+      # Extract the postfix of a semver (e.g. 0.0.0-stage => stage)
+      - cf_export STAGE=$(echo ${{CF_RELEASE_TAG}} | sed -E 's/^[^-]+-?//')
+
+  pull_image_sha:
+    title: Pull image with commit sha
+    stage: "Promote"
+    image: "${{CF_DOCKER_REPO_URL}}/${{CF_REPO_NAME}}:${{CF_REVISION}}"
+    commands:
+    - "true"
+
+  push_image_tag:
+    title: Push image with release tag
+    stage: "Promote"
+    type: push
+    image_name: ${{CF_REPO_NAME}}
+    candidate: "${{CF_DOCKER_REPO_URL}}/${{CF_REPO_NAME}}:${{CF_REVISION}}"
+    tags:
+    - "${{CF_RELEASE_TAG}}"
+
+  deploy:
+    title: Deploy Release
+    stage: "Deploy"
+    image: 'codefresh/cli:latest'
+    commands:
+      - codefresh run ${{CF_REPO_OWNER}}/${{CF_REPO_NAME}}/deploy-${{STAGE}} -d -b=${{CF_BRANCH}} -v CF_RELEASE_TAG=${{CF_RELEASE_TAG}} -v CF_PRERELEASE_FLAG=${{CF_PRERELEASE_FLAG}} -v STAGE=${{STAGE}}
+    when:
+      condition:
+        all:
+          stageDefined: "'${{STAGE}}' != ''"

deploy/ctl

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+#!/usr/bin/env variant
+# vim:set ft=yaml
+
+parameters:
+- name: config
+  default: .color
+  description: "Config file that keeps track of the current color"
+
+- name: namespace
+  default: "default"
+  description: "Kubernetes namespace"
+
+tasks:
+
+  # https://istio.io/docs/tasks/traffic-management/ingress/#determining-the-ingress-ip-and-ports-when-using-an-external-load-balancer
+  istio-ingress:
+    description: Output the FQHN of the Istio Ingress Gateway
+    script: |
+      kubectl --namespace istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].hostname}'
+
+  # https://istio.io/docs/setup/kubernetes/quick-start/
+  istio-injection:
+    description: Enable Istio Sidecar Injection for a namespace
+    script: |
+      kubectl label namespace {{ get "namespace" }} istio-injection=enabled --overwrite=true
+
+  use-context:
+    description: "Configure kube-context"
+    script: |
+      kubectl config use-context ${KUBE_CONTEXT}
+
+  deps:
+    description: "Install alpine dependencies"
+    script: |
+      ! which apk >/dev/null || apk add --update curl make bash git kubectl@cloudposse helm@cloudposse helmfile@cloudposse
+      helm init --client-only
+
+  color:
+    description: "Lookup the current color"
+    script: |
+      config=${CF_VOLUME_PATH:-.}/{{ get "config" }}
+      if [ -f ${config} ]; then
+        cat ${config}
+      else
+        echo "blue" | tee ${config}
+      fi
+
+  blue-green:
+    description: "Trigger a blue-green deployment"
+    parameters:
+    - name: color
+      type: string
+      description: "Selected color to deploy"
+
+    - name: blue
+      type: string
+      default: green
+      description: "Flip blue color to this color"
+
+    - name: green
+      type: string
+      default: blue
+      description: "Flip green color to this color"
+
+    steps:
+    - task: deps
+    - task: use-context
+    - task: istio-injection
+    - script: |
+        config=${CF_VOLUME_PATH:-.}/{{ get "config" }}
+        cur_color={{ get "color" }}
+        new_color={{ get "color" | get }}
+        echo "Config file is ${config}"
+        echo "Updating [${KUBE_CONTEXT}] context {{ get "namespace" }} namespace: $cur_color => $new_color"
+        export COLOR=$new_color
+        # Deploy the app and update istio virtual service
+        helmfile --namespace {{ get "namespace" }} sync
+        echo "$new_color" > ${config}

deploy/helmfile.yaml

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+# Ordered list of releases. 
+helmfiles:
+  - "releases/app.yaml"
+  - "releases/istio.yaml"