Operator 101

Operator 101 〜Operatorに手足をつっこんでみようか。レッツエンジョイ〜
@capsmalt (Kazufumi Saito), Red Hat K.K.

2019/12/20
OpenShift.Run

11/28CNDKの資料を少しアップデートした内容です。あくまで101ではありますが，誰かしらのお役に立てると嬉しいです。

Transcript

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21. Today’s Agenda 1 2 3 Kubernetes Core Why / What Operator How to get Operator 21
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35. Copyright 2019 Red Hat K.K. Cloud Infrastructure Resources Hardware, Virtualization, Cloud and Service Provider Certifications CI/CD Workload Serverless Workload Machine Learning Workload IoT Workload Workload Abstraction Any Applications Resource Abstraction Any Resources Company Core Value? (*Not Kubernetes) 8 C 8 => K ) ( ) 35
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      2.3 413 D C D 1 431 .3 C 2.3 413 1 5 C5 63
64. Copyright 2019 Red Hat K.K. $ operator-sdk new memcached-operator ( ) ( . 1 64
65. Copyright 2019 Red Hat K.K. $ operator-sdk add api --api- version=cache.example.com/v1alpha1 --kind=Memcached (pkg/apis/cache/v1alpha1/memcached_types.g D A . C 2 type MemcachedSpec struct { // Size is the size of the memcached deployment Size int32 `json:"size"` } type MemcachedStatus struct { // Nodes are the names of the memcached pods // +listType=set Nodes []string `json:"nodes"` } 65
66. Copyright 2019 Red Hat K.K. ) D . $ operator-sdk generate k8s $ operator-sdk generate openapi 2 ( 2AC 66
67. Copyright 2019 Red Hat K.K. $ operator-sdk add controller --api- version=cache.example.com/v1alpha1 --kind=Memcached err := c.Watch( &source.Kind{Type: &cachev1alpha1.Memcached{}}, &handler.EnqueueRequestForObject{}, ) (pkg/controller/memcached/memcached_controlle A C . I 3 err := c.Watch( &source.Kind{Type: &appsv1.Deployment{}}, &handler.EnqueueRequestForOwner{ IsController: true, OwnerType: &cachev1alpha1.Memcached{}}, ) https://github.com/operator-framework/operato sdk/blob/master/example/memcached- operator/memcached_controller.go.tmpl 67
68. Copyright 2019 Red Hat K.K. func (r *ReconcileMemcached) Reconcile(request reconcile.Request) (reconcile.Result, error) { // Lookup the Memcached instance for this reconcile request memcached := &cachev1alpha1.Memcached{} err := r.client.Get(context.TODO(),request.NamespacedName, memcached) ... } )) . ()( ( 3 68
69. Copyright 2019 Red Hat K.K. $ operator-sdk build quay.io/capsmalt/memcached-operator:v0.0.1 )4 - C D $ docker push quay.io/capsmalt/memcached-operator:v0.0.1 serviceAccountName: memcached-operator containers: - name: memcached-operator # Replace this with the built image name image: quay.io/capsmalt/memcached-operator:v0.0.1 command: - memcached-operator imagePullPolicy: Always (deploy/operator.yaml) $ kubectl create -f deploy/crds/cache.example.com_memcacheds_crd.yaml & ( .-. 4 - C D I A 69
70. Copyright 2019 Red Hat K.K. $ kubectl create -f deploy/operator.yaml ( 4 ) BDA C $ kubectl create -f deploy/service_account.yaml $ kubectl create -f deploy/role.yaml $ kubectl create -f deploy/role_binding.yaml & C ( 4 ) . 4 C $ kubectl get deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE memcached-operator 1 1 1 1 1m $ kubectl get pod NAME READY STATUS RESTARTS AGE memcached-operator-7d76948766-nrcp7 1/1 Running 0 1m 70
71. Copyright 2019 Red Hat K.K. apiVersion: "cache.example.com/v1alpha1" kind: "Memcached" metadata: name: "example-memcached" spec: size: 3 (deploy/crds/cache.example.com_v1alpha1_Memcached_cr.yaml) $ kubectl apply -f deploy/crds/cache.example.com_v1alpha1_memcached_cr.yaml 71
72. Copyright 2019 Red Hat K.K. D .)() 5 1 . C $ kubectl get deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE memcached-operator 1 1 1 1 2m example-memcached 3 3 3 3 1m $ kubectl get pods NAME READY STATUS RESTARTS AGE example-memcached-5cc7c78d6-g6h6d 1/1 Running 0 2m example-memcached-5cc7c78d6-g5k7v 1/1 Running 0 2m example-memcached-5cc7c78d6-m7vn7 1/1 Running 0 2m memcached-operator-7gd6csgfd6-vvjqk 1/1 Running 0 3m 72
73. Copyright 2019 Red Hat K.K. ( 53- 2 . ( ) apiVersion: "cache.example.com/v1alpha1" kind: "Memcached" metadata: name: "example-memcached" spec: size: 5 $ kubectl apply -f deploy/crds/cache.example.com_v1alpha1_memcached_cr.yaml $ kubectl get deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE example-memcached 5 5 5 5 10m 73
74. Copyright 2019 Red Hat K.K. $ operator-sdk new memcached-operator \ --api-version=cache.example.com/v1alpha1 \ --kind=Memcached --type=ansible Creates: • Ansible Role • Mapping File (watches.yaml) • Custom Resource Definition • Deploy manifest for the new Operator # watches.yaml --- - version: v1alpha1 group: cache.example.com kind: Memcached playbook: /path/to/playbook 74
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      Kubernetes Operator Operator SDK DEV Deployment Role ClusterRole RoleBinding ClusterRoleBinding ServiceAccount CustomResourceDefinition 89
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99. Copyright 2019 Red Hat K.K. Automated Dependency Resolution My Operator v1.1.2 require s requires Jaeger Operator jaeger.jaegertracing.io /v1 CockroachDB Operator cockroachdb.charts.helm.k8s.io/v1alpha 1 resolves to resolves to Operator Framework 
     installed by installed by   
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