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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,11 +1,15 @@ | ||
| apiVersion: 0.1.0 | ||
| apiVersion: 0.3.0 | ||
| environments: | ||
| default: | ||
| destination: | ||
| namespace: default | ||
| namespace: blue-green-deploy | ||
| server: https://kubernetes.default.svc | ||
| k8sVersion: v1.10.0 | ||
| path: default | ||
| kind: ksonnet.io/app | ||
| name: blue-green-deploy | ||
| registries: | ||
| incubator: | ||
| protocol: github | ||
| uri: github.com/ksonnet/parts/tree/master/incubator | ||
| version: 0.0.1 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| #!bin/bash | ||
|
|
||
| DEPLOYMENT_NAME=$(echo "${DEPLOY_MANIFEST}" | jq -r '.metadata.name') | ||
| SERVICE_NAME=$(echo "${SERVICE_MANIFEST}" | jq -r '.metadata.name') | ||
|
|
||
| # 1. Check if the deployment exists. If it doesn't exist, this is the initial deployment and we | ||
| # can simply deploy without blue-green. Add the app label using jq | ||
| out=$(kubectl get --export -o json deployment.apps/${DEPLOYMENT_NAME} 2>&1) | ||
| if [ $? -ne 0 ]; then | ||
| if [[ "${out}" =~ "NotFound" ]] ; then | ||
| echo "Initial deployment" | ||
| echo ${DEPLOY_MANIFEST} | \ | ||
| jq ".metadata.labels += {\"app.kubernetes.io/instance\": \"${APPNAME}\"}" | \ | ||
| kubectl apply -o yaml -f - || exit 1 | ||
| echo ${SERVICE_MANIFEST} | \ | ||
| jq ".metadata.labels += {\"app.kubernetes.io/instance\": \"${APPNAME}\"}" | \ | ||
| kubectl apply -o yaml -f - || exit 1 | ||
| exit 0 | ||
| fi | ||
| echo "Failed to get deployment: ${out}" | ||
| exit 1 | ||
| fi | ||
| ORIGINAL_DEPLOY_MANIFEST=$out | ||
|
|
||
| # 2. Clone the original, running deployment to a temporary deployment, with tweaks to its name and | ||
| # selectors. The jq command carries over all labels and selectors and appends the `-temp` suffix. | ||
| TMP_DEPLOYMENT_NAME="${DEPLOYMENT_NAME}-temp" | ||
| echo ${ORIGINAL_DEPLOY_MANIFEST} | jq -r '.metadata.name+="-temp" | | ||
| .spec.template.metadata.labels += (.spec.template.metadata.labels | to_entries | map(.value+="-temp") | from_entries) | | ||
| .spec.selector.matchLabels += (.spec.selector.matchLabels | to_entries | map(.value+="-temp") | from_entries)' | | ||
| kubectl apply -f - | ||
|
|
||
| # 3. Wait for cloned deployment to become ready. | ||
| sleep 2 | ||
| echo "Waiting for successful rollout of new (temporary) deployment" | ||
| kubectl rollout status --watch=true deployments.apps/${TMP_DEPLOYMENT_NAME} || exit 1 | ||
| echo "Rollout of temporary deployment successful" | ||
|
|
||
| # 4. Patch the service object such that all traffic is redirected to the cloned, temporary | ||
| # deployment. After this step, the original deployment will no longer be receiving traffic. | ||
| kubectl get service ${SERVICE_NAME} --export -o json | \ | ||
| jq '.spec.selector = (.spec.selector | with_entries(.value+="-temp"))' | | ||
| kubectl apply -f - || exit 1 | ||
| sleep 5 # Sleep slightly to allow iptables to get propagated to all nodes in the cluster | ||
|
|
||
| # 5. Update the original deployment (now receiving no traffic) with the new manifest | ||
| echo "Updating original deployment" | ||
| echo ${DEPLOY_MANIFEST} | \ | ||
| jq ".metadata.labels += {\"app.kubernetes.io/instance\": \"${APPNAME}\"}" | \ | ||
| kubectl apply -f - || exit 1 | ||
|
|
||
| # 6. Wait for the new deployment to become complete | ||
| sleep 2 | ||
| echo "Waiting for successful rollout of new deployment" | ||
| kubectl rollout status --watch=true deployments.apps/${DEPLOYMENT_NAME} || exit 1 | ||
| echo "Rollout of new deployment successful" | ||
|
|
||
| # dummy wait step for demo purposes | ||
| echo "sleeping for 30 seconds" | ||
| sleep 30 | ||
|
|
||
| # 7. Apply the new service object. Traffic will be redirected to the new version of the deployment | ||
| echo "Updating original service object" | ||
| echo ${SERVICE_MANIFEST} | \ | ||
| jq ".metadata.labels += {\"app.kubernetes.io/instance\": \"${APPNAME}\"}" | \ | ||
| kubectl apply -f - || exit 1 | ||
|
|
||
| sleep 10 | ||
| # 8. Remove the cloned deployment, which is no longer receiving any traffic | ||
| echo "Deleting ephemeral deployment" | ||
| kubectl delete deployments/${TMP_DEPLOYMENT_NAME} --ignore-not-found=true || exit 1 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| local bgGuestbook = std.extVar("__ksonnet/components")["bg-guestbook"]; | ||
| local bgGuestbookSvc = bgGuestbook[0]; | ||
| local bgGuestbookDeploy = bgGuestbook[1]; | ||
|
|
||
| [ | ||
| { | ||
| "apiVersion": "v1", | ||
| "kind": "Pod", | ||
| "metadata": { | ||
| "generateName": "blue-green-", | ||
| "annotations": { | ||
| "argocd.argoproj.io/hook": "Sync", | ||
| "deploy-manifest": std.manifestJson(bgGuestbookDeploy), | ||
| "svc-manifest": std.manifestJson(bgGuestbookSvc), | ||
| }, | ||
| }, | ||
| "spec": { | ||
| "serviceAccountName": "blue-green-sa", | ||
| "restartPolicy": "Never", | ||
| "containers": [ | ||
| { | ||
| "name": "blue-green", | ||
| "image": "argoproj/argoexec:latest", | ||
| "command": ["bash", "-c"], | ||
| "args": [" | ||
| curl -L -o /usr/local/bin/kubectl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl && | ||
| chmod +x /usr/local/bin/kubectl && | ||
| curl -sSL -o /usr/local/bin/blue-green.sh https://raw.githubusercontent.com/argoproj/argocd-example-apps/master/blue-green-deploy/blue-green.sh && | ||
| chmod +x /usr/local/bin/blue-green.sh && | ||
| blue-green.sh | ||
| "], | ||
| "env": [ | ||
| { | ||
| "name": "DEPLOY_MANIFEST", | ||
| "valueFrom": { | ||
| "fieldRef": { | ||
| "fieldPath": "metadata.annotations['deploy-manifest']" | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| "name": "SERVICE_MANIFEST", | ||
| "valueFrom": { | ||
| "fieldRef": { | ||
| "fieldPath": "metadata.annotations['svc-manifest']" | ||
| } | ||
| } | ||
| }, | ||
| // NOTE: app.kubernetes.io/instance will get injected into the hook object | ||
| { | ||
| "name": "APPNAME", | ||
| "valueFrom": { | ||
| "fieldRef": { | ||
| "fieldPath": "metadata.labels['app.kubernetes.io/instance']" | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| ], | ||
| } | ||
| }, | ||
| // RBAC to allow the blue-green pod privileges to manipulate deployments and services | ||
| { | ||
| "apiVersion": "v1", | ||
| "kind": "ServiceAccount", | ||
| "metadata": { | ||
| "name": "blue-green-sa" | ||
| } | ||
| }, | ||
| { | ||
| "apiVersion": "rbac.authorization.k8s.io/v1", | ||
| "kind": "Role", | ||
| "metadata": { | ||
| "name": "blue-green-role" | ||
| }, | ||
| "rules": [ | ||
| { | ||
| "apiGroups": [ | ||
| "apps", | ||
| "extensions" | ||
| ], | ||
| "resources": [ | ||
| "deployments", | ||
| ], | ||
| "verbs": [ | ||
| "list", | ||
| "get", | ||
| "create", | ||
| "update", | ||
| "patch", | ||
| "delete", | ||
| ] | ||
| }, | ||
| { | ||
| "apiGroups": [ | ||
| "" | ||
| ], | ||
| "resources": [ | ||
| "services" | ||
| ], | ||
| "verbs": [ | ||
| "list", | ||
| "get", | ||
| "create", | ||
| "update", | ||
| "patch", | ||
| "delete", | ||
| ] | ||
| } | ||
| ] | ||
| }, | ||
| { | ||
| "apiVersion": "rbac.authorization.k8s.io/v1", | ||
| "kind": "RoleBinding", | ||
| "metadata": { | ||
| "name": "blue-green-rolebinding" | ||
| }, | ||
| "roleRef": { | ||
| "apiGroup": "rbac.authorization.k8s.io", | ||
| "kind": "Role", | ||
| "name": "blue-green-role" | ||
| }, | ||
| "subjects": [ | ||
| { | ||
| "kind": "ServiceAccount", | ||
| "name": "blue-green-sa" | ||
| } | ||
| ] | ||
| } | ||
| ] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,9 @@ | ||
| local base = import "base.libsonnet"; | ||
| // uncomment if you reference ksonnet-lib | ||
| // local k = import "k.libsonnet"; | ||
| // local deployment = k.apps.v1beta2.deployment; | ||
|
|
||
| base + { | ||
| // Insert user-specified overrides here. For example if a component is named \"nginx-deployment\", you might have something like:\n") | ||
| // "nginx-deployment"+: k.deployment.mixin.metadata.labels({foo: "bar"}) | ||
| // "nginx-deployment"+: deployment.mixin.metadata.withLabels({foo: "bar"}) | ||
| } |
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