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119 lines
2.0 KiB
Markdown
119 lines
2.0 KiB
Markdown
# Deploy and upgrade guide
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### Setup Helm
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Install Helm CLI:
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```bash
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brew install kubernetes-helm
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```
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Create a service account for Tiller:
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```bash
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kubectl -n kube-system create sa tiller
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```
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Create a cluster role binding for Tiller:
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```bash
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kubectl create clusterrolebinding tiller-cluster-rule \
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--clusterrole=cluster-admin \
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--serviceaccount=kube-system:tiller
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```
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Deploy Tiller in kube-system namespace:
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```bash
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helm init --skip-refresh --upgrade --service-account tiller
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```
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### Using the Helm chart
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Add k8s-podinfo repo:
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```bash
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helm repo add sp https://stefanprodan.github.io/k8s-podinfo
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```
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Create a namespace:
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```bash
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kubectl create namespace test
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```
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Create a release named frontend:
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```bash
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helm upgrade --install --wait frontend \
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--set service.type=NodePort \
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--set service.nodePort=30098 \
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--namespace test \
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sp/podinfo
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```
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Check if frontend is accessible from within the cluster:
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```bash
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helm test --cleanup frontend
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```
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Check if the frontend is available from outside the cluster:
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```bash
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curl http://<KUBE_PUBLIC_IP>:30098/version
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```
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Set CPU/memory requests and limits:
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```bash
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helm upgrade --reuse-values frontend \
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--set resources.requests.cpu=10m \
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--set resources.limits.cpu=100m \
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--set resources.requests.memory=16Mi \
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--set resources.limits.memory=128Mi \
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sp/podinfo
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```
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Setup horizontal pod autoscaling (HPA) based on CPU average usage and memory consumption:
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```bash
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helm upgrade --reuse-values frontend \
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--set hpa.enabled=true \
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--set hpa.maxReplicas=10 \
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--set hpa.cpu=80 \
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--set hpa.memory=200Mi \
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sp/podinfo
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```
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Increase the minimum replica count:
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```bash
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helm upgrade --reuse-values frontend \
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--set replicaCount=2 \
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sp/podinfo
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```
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Downgrade podinfo to version 0.2.0:
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```bash
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helm upgrade --reuse-values frontend \
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--set image.tag=0.2.0 \
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sp/podinfo
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```
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Rollback to the latest version:
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```bash
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helm rollback frontend
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```
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Delete the release:
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```bash
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helm delete --purge frontend
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```
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