mirror of https://github.com/fluxcd/cli-utils.git
164 lines
3.6 KiB
Markdown
164 lines
3.6 KiB
Markdown
[kind]: https://github.com/kubernetes-sigs/kind
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# Demo: Init Command
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This demo shows how the kapply init command works.
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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=$(mktemp -d)
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```
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Alternatively, use
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> ```
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> DEMO_HOME=~/demo
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> ```
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## Establish the base
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<!-- @createBase @testE2EAgainstLatestRelease -->
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```
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BASE=$DEMO_HOME/base
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mkdir -p $BASE
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OUTPUT=$DEMO_HOME/output
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mkdir -p $OUTPUT
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GREEN='\033[0;32m'
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RED='\033[0;31m'
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NC='\033[0m' # No Color
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function expectedOutputLine() {
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if ! grep -q "$@" "$OUTPUT/status"; then
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echo -e "${RED}Error: output line not found${NC}"
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echo -e "${RED}Expected: $@${NC}"
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exit 1
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else
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echo -e "${GREEN}Success: output line found${NC}"
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fi
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}
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```
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## Create the first "app"
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Create the config yaml for three config maps: (cm-a, cm-b, cm-c).
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<!-- @createFirstConfigMaps @testE2EAgainstLatestRelease-->
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```
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cat <<EOF >$BASE/namespace.yaml
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apiVersion: v1
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kind: Namespace
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metadata:
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name: test-namespace
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EOF
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cat <<EOF >$BASE/config-map-a.yaml
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: cm-a
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namespace: test-namespace
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labels:
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name: test-config-map-label
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EOF
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cat <<EOF >$BASE/config-map-b.yaml
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: cm-b
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namespace: test-namespace
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labels:
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name: test-config-map-label
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EOF
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cat <<EOF >$BASE/config-map-c.yaml
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: cm-c
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namespace: test-namespace
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labels:
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name: test-config-map-label
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EOF
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```
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## Run end-to-end tests
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The following requires installation of [kind].
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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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kind delete cluster
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kind create cluster
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```
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Use the kapply init command to generate the inventory template. This contains
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the namespace and inventory id used by apply to create inventory objects.
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<!-- @createInventoryTemplate @testE2EAgainstLatestRelease-->
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```
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kapply init $BASE | tee $OUTPUT/status
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expectedOutputLine "namespace: test-namespace is used for inventory object"
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```
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Add another ConfigMap (cm-d) which is in the default namespace. The init
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command should calculate the namespace to be default, since not all
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objects are in the test-namespace.
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<!-- @updateApp @testE2EAgainstLatestRelease -->
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```
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cat <<EOF >$BASE/config-map-d.yaml
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: cm-d
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labels:
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name: test-config-map-label
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EOF
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# Remove the initial inventory template.
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rm -f $BASE/inventory-template.yaml
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kapply init $BASE | tee $OUTPUT/status
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expectedOutputLine "namespace: default is used for inventory object"
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```
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Remove the ConfigMap (cm-d) which is in the default namespace, and
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add a cluster-scoped object. This cluster-scoped object should not
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be used in the init namespace calculations, so we should calculate the
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namespace as test-namespace.
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<!-- @updateAppAgain @testE2EAgainstLatestRelease -->
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```
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# Remove the initial inventory template.
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rm -f $BASE/inventory-template.yaml
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# Remove the ConfigMap in the default namespace.
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rm -f $BASE/config-map-d.yaml
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# Add cluster-scoped resource--cluster-role
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cat <<EOF >$BASE/cluster-role.yaml
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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# "namespace" omitted since ClusterRoles are not namespaced
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name: secret-reader
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rules:
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- apiGroups: [""]
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#
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# at the HTTP level, the name of the resource for accessing Secret
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# objects is "secrets"
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resources: ["secrets"]
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verbs: ["get", "watch", "list"]
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EOF
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kapply init $BASE | tee $OUTPUT/status
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expectedOutputLine "namespace: test-namespace is used for inventory object"
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```
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