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58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * cli_reference/developer_cli_odo/creating-instances-of-services-managed-by-the-operators.adoc
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[id="creating-services-from-yaml-files_{context}"]
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= Creating services from YAML files
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If the YAML definition of the service or Custom Resource (CR) has invalid or placeholder data, you can use the `--dry-run` flag to get the YAML definition, specify the correct values, and start the service using the corrected YAML definition.
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Printing and modifying the YAML used to start a service
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`{odo-title}` provides the feature to print the YAML definition of the service or CR provided by the Operator before starting a service.
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. To display the YAML of the service, run:
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+
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[source,terminal]
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----
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$ odo service create <operator-name> --crd <cr-name> --dry-run
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----
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For example, to print YAML definition of `EtcdCluster` provided by the `etcdoperator.v0.9.4` Operator, run:
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[source,terminal]
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----
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$ odo service create etcdoperator.v0.9.4 --crd EtcdCluster --dry-run
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----
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The YAML is saved as the `etcd.yaml` file.
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. Modify the `etcd.yaml` file:
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[source,yaml]
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----
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apiVersion: etcd.database.coreos.com/v1beta2
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kind: EtcdCluster
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metadata:
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name: my-etcd-cluster // <1>
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spec:
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size: 1 // <2>
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version: 3.2.13
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----
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<1> Change the name from `example` to `my-etcd-cluster`
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<2> Reduce the size from `3` to `1`
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. Start a service from the YAML file:
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[source,terminal]
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----
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$ odo service create --from-file etcd.yaml
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----
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. Verify that the `EtcdCluster` service has started with one Pod instead of the pre-configured three Pods:
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[source,terminal]
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----
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$ oc get pods | grep my-etcd-cluster
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----
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