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Add extendeddaemonset-check helper (#53)
* Add extendeddaemonset-check helper * add new cmd binary: `check-eds` * add new `app-example` chart * update ci to deliver the `datadog/extendeddaemonset-check` container image
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| # Patterns to ignore when building packages. | ||
| # This supports shell glob matching, relative path matching, and | ||
| # negation (prefixed with !). Only one pattern per line. | ||
| .DS_Store | ||
| # Common VCS dirs | ||
| .git/ | ||
| .gitignore | ||
| .bzr/ | ||
| .bzrignore | ||
| .hg/ | ||
| .hgignore | ||
| .svn/ | ||
| # Common backup files | ||
| *.swp | ||
| *.bak | ||
| *.tmp | ||
| *.orig | ||
| *~ | ||
| # Various IDEs | ||
| .project | ||
| .idea/ | ||
| *.tmproj | ||
| .vscode/ |
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| apiVersion: v2 | ||
| name: app-example | ||
| description: A Helm chart for Kubernetes | ||
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| # A chart can be either an 'application' or a 'library' chart. | ||
| # | ||
| # Application charts are a collection of templates that can be packaged into versioned archives | ||
| # to be deployed. | ||
| # | ||
| # Library charts provide useful utilities or functions for the chart developer. They're included as | ||
| # a dependency of application charts to inject those utilities and functions into the rendering | ||
| # pipeline. Library charts do not define any templates and therefore cannot be deployed. | ||
| type: application | ||
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| # This is the chart version. This version number should be incremented each time you make changes | ||
| # to the chart and its templates, including the app version. | ||
| # Versions are expected to follow Semantic Versioning (https://semver.org/) | ||
| version: 0.1.0 | ||
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| # This is the version number of the application being deployed. This version number should be | ||
| # incremented each time you make changes to the application. Versions are not expected to | ||
| # follow Semantic Versioning. They should reflect the version the application is using. | ||
| appVersion: 1.16.0 |
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| # APP Example | ||
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| ## Introduction | ||
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| This chart allows you to deploy a "dummy" application that uses the ExtendedDaemonset. | ||
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| Thanks to this chart you can test several ExtendedDaemonset features, such as: | ||
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| * The Canary deployment strategy | ||
| * The `extendeddaemonset-check` util pod with the `helm test` command. | ||
| * The possibility to override a `Pod` resources for a specific `Node` thanks to an | ||
| `ExtendedDaemonsetSettings` resource. | ||
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| ## Deployment | ||
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| Before deploying this chart, you should have deployed the `ExtendedDaemonset` Controller with the following command: `helm install eds-controller ./chart/extendeddaemonset`. | ||
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| Now you can deploy the `app-example` with default values this: `helm install foo ./chart/app-example`. | ||
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| ### Canary deployment | ||
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| ### Check if a canary deployment finished | ||
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| Helm3 introduces the `helm test` command, which can be used to validate a "complex" deployment, was looking only | ||
| at the state if the pod is not enough. It is also useful when the chart contains CRDs because Helm is not aware | ||
| of how to understand the status of a CRD. | ||
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| This chart contains a test "Pod" (manifests present in `app-example/templates/tests`) that can check if a | ||
| Extendedaemonset update is finished. | ||
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| To simulate an update, the following command will update the docker image tag for the "foo" application: | ||
| `helm upgrade foo ./chart/app-example --set image.tag=stable`. | ||
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| The `ExtendedDaemonset` status should have been moved to `canary` | ||
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| ```console | ||
| $ kubectl get eds | ||
| NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE IGNORED UNRESPONSIVE NODES STATUS REASON ACTIVE RS CANARY RS AGE | ||
| foo-app-example 3 3 3 3 3 Canary foo-app-example-db2sk foo-app-example-76kz8 1h | ||
| ``` | ||
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| With the default configuration, the Canary deployment is set to 3min. During this period only one pod has been updated. | ||
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| The command `helm test foo` starts a Pod with a specific container that checks the `ExtendedDaemonset` status. The command returns when the canary deployment and the rolling-up are finished. |
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| {{/* | ||
| Expand the name of the chart. | ||
| */}} | ||
| {{- define "app-example.name" -}} | ||
| {{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }} | ||
| {{- end }} | ||
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| {{/* | ||
| Create a default fully qualified app name. | ||
| We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec). | ||
| If release name contains chart name it will be used as a full name. | ||
| */}} | ||
| {{- define "app-example.fullname" -}} | ||
| {{- if .Values.fullnameOverride }} | ||
| {{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }} | ||
| {{- else }} | ||
| {{- $name := default .Chart.Name .Values.nameOverride }} | ||
| {{- if contains $name .Release.Name }} | ||
| {{- .Release.Name | trunc 63 | trimSuffix "-" }} | ||
| {{- else }} | ||
| {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }} | ||
| {{- end }} | ||
| {{- end }} | ||
| {{- end }} | ||
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| {{/* | ||
| Create chart name and version as used by the chart label. | ||
| */}} | ||
| {{- define "app-example.chart" -}} | ||
| {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }} | ||
| {{- end }} | ||
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| {{/* | ||
| Common labels | ||
| */}} | ||
| {{- define "app-example.labels" -}} | ||
| helm.sh/chart: {{ include "app-example.chart" . }} | ||
| {{ include "app-example.selectorLabels" . }} | ||
| {{- if .Chart.AppVersion }} | ||
| app.kubernetes.io/version: {{ .Chart.AppVersion | quote }} | ||
| {{- end }} | ||
| app.kubernetes.io/managed-by: {{ .Release.Service }} | ||
| {{- end }} | ||
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| {{/* | ||
| Selector labels | ||
| */}} | ||
| {{- define "app-example.selectorLabels" -}} | ||
| app.kubernetes.io/name: {{ include "app-example.name" . }} | ||
| app.kubernetes.io/instance: {{ .Release.Name }} | ||
| {{- end }} | ||
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| {{/* | ||
| Create the name of the service account to use | ||
| */}} | ||
| {{- define "app-example.serviceAccountName" -}} | ||
| {{- if .Values.serviceAccount.create }} | ||
| {{- default (include "app-example.fullname" .) .Values.serviceAccount.name }} | ||
| {{- else }} | ||
| {{- default "default" .Values.serviceAccount.name }} | ||
| {{- end }} | ||
| {{- end }} |
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| apiVersion: datadoghq.com/v1alpha1 | ||
| kind: ExtendedDaemonSet | ||
| metadata: | ||
| name: {{ include "app-example.fullname" . }} | ||
| labels: | ||
| {{- include "app-example.labels" . | nindent 4 }} | ||
| spec: | ||
| strategy: | ||
| {{- toYaml .Values.strategy | nindent 4 }} | ||
| template: | ||
| spec: | ||
| {{- with .Values.imagePullSecrets }} | ||
| imagePullSecrets: | ||
| {{- toYaml . | nindent 8 }} | ||
| {{- end }} | ||
| serviceAccountName: {{ include "app-example.serviceAccountName" . }} | ||
| securityContext: | ||
| {{- toYaml .Values.podSecurityContext | nindent 8 }} | ||
| containers: | ||
| - name: {{ .Chart.Name }} | ||
| securityContext: | ||
| {{- toYaml .Values.securityContext | nindent 12 }} | ||
| image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}" | ||
| imagePullPolicy: {{ .Values.image.pullPolicy }} | ||
| resources: | ||
| {{- toYaml .Values.resources | nindent 12 }} | ||
| {{- with .Values.tolerations }} | ||
| tolerations: | ||
| {{- toYaml . | nindent 6 }} | ||
| {{- end }} |
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| {{- if .Values.serviceAccount.create -}} | ||
| apiVersion: v1 | ||
| kind: ServiceAccount | ||
| metadata: | ||
| name: {{ include "app-example.serviceAccountName" . }} | ||
| labels: | ||
| {{- include "app-example.labels" . | nindent 4 }} | ||
| {{- with .Values.serviceAccount.annotations }} | ||
| annotations: | ||
| {{- toYaml . | nindent 4 }} | ||
| {{- end }} | ||
| {{- end }} |
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| {{- if .Values.rbac.create -}} | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: Role | ||
| metadata: | ||
| name: "{{ include "app-example.fullname" . }}-test" | ||
| labels: | ||
| {{- include "app-example.labels" . | nindent 4 }} | ||
| annotations: | ||
| "helm.sh/hook": test | ||
| rules: | ||
| - apiGroups: | ||
| - datadoghq.com | ||
| resources: | ||
| - 'extendeddaemonsets' | ||
| - 'extendeddaemonsets/status' | ||
| verbs: | ||
| - 'get' | ||
| --- | ||
| kind: RoleBinding | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: "{{ include "app-example.fullname" . }}-test" | ||
| labels: | ||
| {{- include "app-example.labels" . | nindent 4 }} | ||
| annotations: | ||
| "helm.sh/hook": test | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: "{{ include "app-example.serviceAccountName" . }}-test" | ||
| roleRef: | ||
| kind: Role | ||
| name: "{{ include "app-example.fullname" . }}-test" | ||
| apiGroup: rbac.authorization.k8s.io | ||
| {{- end -}} |
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| @@ -0,0 +1,12 @@ | ||
| {{- if .Values.serviceAccount.create -}} | ||
| apiVersion: v1 | ||
| kind: ServiceAccount | ||
| metadata: | ||
| name: {{ include "app-example.serviceAccountName" . }}-test | ||
| labels: | ||
| {{- include "app-example.labels" . | nindent 4 }} | ||
| {{- with .Values.serviceAccount.annotations }} | ||
| annotations: | ||
| {{- toYaml . | nindent 4 }} | ||
| {{- end }} | ||
| {{- end }} |
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