Update examples for Argo CD v0.11

2018-12-08 04:56:06 -08:00
1 parent 62c453945b
commit 382b85852f
@@ -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