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feat: support notifications on rollout events using notifications-eng…
…ine (argoproj#1175) feat: support notifications on rollout events using notifications-engine (argoproj#1175) Signed-off-by: Alexander Matyushentsev <[email protected]> Signed-off-by: Andrii Perenesenko <[email protected]>
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| # Notifications | ||
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| !!! important | ||
| Available since v1.1 | ||
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| Argo Rollouts provides notifications powered by the [Notifications Engine](https://github.com/argoproj/notifications-engine). | ||
| Controller administrators can leverage flexible systems of triggers and templates to configure notifications requested | ||
| by the end users. The end-users can subscribe to the configured triggers by adding an annotation to the Rollout objects. | ||
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| ## Configuration | ||
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| The trigger defines the condition when the notification should be sent as well as the notification content template. | ||
| Default Argo Rollouts comes with a list of built-in triggers that cover the most important events of Argo Rollout live-cycle. | ||
| Both triggers and templates are configured in the `argo-rollouts-notification-configmap` ConfigMap. In order to get | ||
| started quickly, you can use pre-configured notification templates defined in [notifications-install.yaml](../../manifests/notifications-install.yaml). | ||
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| If you are leveraging Kustomize it is recommended to include [notifications-install.yaml](../../manifests/notifications-install.yaml) as a remote | ||
| resource into your `kustomization.yaml` file: | ||
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| ```yaml | ||
| apiVersion: kustomize.config.k8s.io/v1beta1 | ||
| kind: Kustomization | ||
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| resources: | ||
| - https://github.com/argoproj/argo-rollouts/releases/latest/download/install.yaml | ||
| - https://github.com/argoproj/argo-rollouts/releases/latest/download/notifications-install.yaml | ||
| ``` | ||
| After including the `argo-rollouts-notification-configmap` ConfigMap the administrator needs to configure integration | ||
| with the required notifications service such as Slack or MS Teams. An example below demonstrates Slack integration: | ||
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| ```yaml | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: argo-rollouts-notification-configmap | ||
| data: | ||
| service.slack: | | ||
| token: $slack-token | ||
| --- | ||
| apiVersion: v1 | ||
| kind: Secret | ||
| metadata: | ||
| name: argo-rollouts-notification-secret | ||
| stringData: | ||
| slack-token: <my-slack-token> | ||
| ``` | ||
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| Learn more about supported services and configuration settings in services [documentation](../generated/notification-services/overview.md). | ||
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| ## Subscriptions | ||
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| The end-users can start leveraging notifications using `notifications.argoproj.io/subscribe.<trigger>.<service>: <recipient>` annotation. | ||
| For example, the following annotation subscribes two Slack channels to notifications about canary rollout step completion: | ||
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| ```yaml | ||
| --- | ||
| apiVersion: argoproj.io/v1alpha1 | ||
| kind: Rollout | ||
| metadata: | ||
| name: rollout-canary | ||
| annotations: | ||
| notifications.argoproj.io/subscribe.on-rollout-step-completed.slack: my-channel1;my-channel2 | ||
| ``` | ||
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| Annotation key consists of following parts: | ||
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| * `on-rollout-step-completed` - trigger name | ||
| * `slack` - notification service name | ||
| * `my-channel1;my-channel2` - a semicolon separated list of recipients | ||
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| ## Customization | ||
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| The Rollout administrator can customize the notifications by configuring notification templates and custom triggers | ||
| in `argo-rollouts-notification-configmap` ConfigMap. | ||
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| ### Templates | ||
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| The notification template is a stateless function that generates the notification content. The template is leveraging | ||
| [html/template](https://golang.org/pkg/html/template/) golang package. It is meant to be reusable and can be referenced by multiple triggers. | ||
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| An example below demonstrates a sample template: | ||
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| ```yaml | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: argo-rollouts-notification-configmap | ||
| data: | ||
| template.my-purple-template: | | ||
| message: | | ||
| Rollout {{.rollout.metadata.name}} has purple image | ||
| slack: | ||
| attachments: | | ||
| [{ | ||
| "title": "{{ .rollout.metadata.name}}", | ||
| "color": "#800080" | ||
| }] | ||
| ``` | ||
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| Each template has access to the following fields: | ||
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| - `rollout` holds the rollout object. | ||
| - `recipient` holds the recipient name. | ||
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| The `message` field of the template definition allows creating a basic notification for any notification service. You can | ||
| leverage notification service-specific fields to create complex notifications. For example using service-specific you can | ||
| add blocks and attachments for Slack, subject for Email or URL path, and body for Webhook. See corresponding service | ||
| [documentation](../generated/notification-services/overview.md) for more information. | ||
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| ### Custom Triggers | ||
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| In addition to custom notification template administrator and configure custom triggers. Custom trigger defines the | ||
| condition when the notification should be sent. The definition includes name, condition and notification templates reference. | ||
| The condition is a predicate expression that returns true if the notification should be sent. The trigger condition | ||
| evaluation is powered by [antonmedv/expr](https://github.com/antonmedv/expr). | ||
| The condition language syntax is described at [Language-Definition.md](https://github.com/antonmedv/expr/blob/master/docs/Language-Definition.md). | ||
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| The trigger is configured in `argo-rollouts-notification-configmap` ConfigMap. For example the following trigger sends a notification | ||
| when rollout pod spec uses `argoproj/rollouts-demo:purple` image: | ||
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| ```yaml | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: argocd-notifications-cm | ||
| data: | ||
| trigger.on-purple: | | ||
| - send: [my-purple-template] | ||
| when: rollout.spec.template.spec.containers[0].image == 'argoproj/rollouts-demo:purple' | ||
| ``` | ||
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| Each condition might use several templates. Typically each template is responsible for generating a service-specific notification part. |
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|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: argo-rollouts-notification-configmap | ||
| data: | ||
| service.slack: | | ||
| token: $slack-token | ||
| ## Custom Trigger | ||
| trigger.on-purple: | | ||
| - send: [my-purple-template] | ||
| when: rollout.spec.template.spec.containers[0].image == 'argoproj/rollouts-demo:purple' | ||
| template.my-purple-template: | | ||
| message: | | ||
| Rollout {{.rollout.metadata.name}} has purple image | ||
| slack: | ||
| attachments: | | ||
| [{ | ||
| "title": "{{ .rollout.metadata.name}}", | ||
| "color": "#800080" | ||
| }] |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,8 @@ | ||
| apiVersion: kustomize.config.k8s.io/v1beta1 | ||
| kind: Kustomization | ||
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| resources: | ||
| - ../../manifests/notifications | ||
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| patchesStrategicMerge: | ||
| - configmap.yaml |
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