mirror of
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155 lines
4.0 KiB
Markdown
155 lines
4.0 KiB
Markdown
[kind]: https://github.com/kubernetes-sigs/kind
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# Demo: Multiple Deployments
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This demo helps you to multiple services on same kubenetes cluster using kustomize.
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Steps:
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1. Create the resources files for wordpress service.
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2. Create the resources files for mysql service.
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3. Spin-up kubernetes cluster on local using [kind].
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4. Deploy the wordpress app using kustomize and verify the status.
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5. Deploy the mysql app using kustomize on same "kind" cluster and verify the status.
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6. Add and remove a resource to mysql service and verify prune.
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First define a place to work:
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<!-- @makeWorkplace @testE2EAgainstLatestRelease -->
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```
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DEMO_HOME=$(mktemp -d)
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```
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Alternatively, use
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> ```
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> DEMO_HOME=~/hello
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> ```
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## Establish the base
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<!-- @createBase @testE2EAgainstLatestRelease -->
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```
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BASE=$DEMO_HOME/base
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mkdir -p $BASE
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mkdir $BASE/wordpress
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mkdir $BASE/mysql
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curl -s -o "$BASE/wordpress/#1.yaml" "https://raw.githubusercontent.com\
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/kubernetes-sigs/kustomize\
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/master/examples/wordpress/wordpress\
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/{deployment,kustomization,service}.yaml"
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curl -s -o "$BASE/mysql/#1.yaml" "https://raw.githubusercontent.com\
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/kubernetes-sigs/kustomize\
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/master/examples/wordpress/mysql\
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/{secret,deployment,kustomization,service}.yaml"
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```
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Create a `grouping.yaml` resource. By this, you are defining the grouping of the current directory, `mysql`. Kustomize uses the unique label in this file to track any future state changes made to this directory. Make sure the label key is `kustomize.config.k8s.io/inventory-id` and give any unique label value and DO NOT change it in future.
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<!-- @createGroupingYaml @testE2EAgainstLatestRelease-->
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```
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cat <<EOF >$BASE/mysql/grouping.yaml
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: inventory-map
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labels:
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kustomize.config.k8s.io/inventory-id: mysql-app
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EOF
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```
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<!-- @setGoBin @testE2EAgainstLatestRelease -->
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```
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MYGOBIN=$GOPATH/bin
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```
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Delete any existing kind cluster and create a new one. By default the name of the cluster is "kind"
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<!-- @deleteAndCreateKindCluster @testE2EAgainstLatestRelease -->
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```
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$MYGOBIN/kind delete cluster;
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$MYGOBIN/kind create cluster;
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```
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Let's run the wordpress and mysql services.
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<!-- @RunWordpressAndMysql @testE2EAgainstLatestRelease -->
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```
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export KUSTOMIZE_ENABLE_ALPHA_COMMANDS=true
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$MYGOBIN/kustomize resources apply $BASE/mysql --status;
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status=$(mktemp);
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$MYGOBIN/resource status fetch $BASE/mysql > $status
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test 1 == \
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$(grep "mysql" $status | grep "Deployment is available. Replicas: 1" | wc -l); \
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echo $?
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test 1 == \
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$(grep "mysql-pass" $status | grep "Resource is always ready" | wc -l); \
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echo $?
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test 1 == \
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$(grep "mysql" $status | grep "Service is ready" | wc -l); \
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echo $?
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$MYGOBIN/kustomize resources apply $BASE/wordpress --status;
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status=$(mktemp);
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$MYGOBIN/resource status fetch $BASE/wordpress > $status
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test 1 == \
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$(grep "wordpress" $status | grep "Deployment is available. Replicas: 1" | wc -l); \
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echo $?
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test 1 == \
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$(grep "wordpress" $status | grep "Service is ready" | wc -l); \
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echo $?
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```
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Let's replace the secret resource from mysql service and verify prune and addition of resource.
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<!-- @ReplaceResourceInMysql @testE2EAgainstLatestRelease -->
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```
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cat <<EOF >$BASE/mysql/secret2.yaml
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apiVersion: v1
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kind: Secret
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metadata:
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name: mysql-pass2
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type: Opaque
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data:
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# Default password is "admin".
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password: YWRtaW5=
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EOF
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rm $BASE/mysql/secret.yaml
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sed -i.bak 's/secret/secret2/' \
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$BASE/mysql/kustomization.yaml
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sed -i.bak 's/mysql-pass/mysql-pass2/' \
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$BASE/mysql/deployment.yaml
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$MYGOBIN/kustomize resources apply $BASE/mysql --status;
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status=$(mktemp);
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$MYGOBIN/resource status fetch $BASE/mysql > $status
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test 1 == \
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$(grep "mysql" $status | grep "Deployment is available. Replicas: 1" | wc -l); \
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echo $?
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test 1 == \
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$(grep "mysql-pass2" $status | grep "Resource is always ready" | wc -l); \
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echo $?
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test 1 == \
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$(grep "mysql" $status | grep "Service is ready" | wc -l); \
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echo $?
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```
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Clean-up the cluster
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<!-- @deleteKindCluster @testE2EAgainstLatestRelease -->
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```
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$MYGOBIN/kind delete cluster;
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``` |