使用 kubebuilder 构建一个简单的 k8s-operator, 随便搞搞.
CRD -> Nginx (deploy - service - ingress)
- golang :
1.20.1 - kubebuilder:
3.9.0 - kubernetes :
1.22.4
- 安装CRD
# 安装
$ make install
# 查看
$ kubectl get crds
NAME CREATED AT
nginxes.devops.github.com 2023-03-01T10:22:32Z
webapis.kube-dev.tomoncle.com 2023-02-26T06:25:30Z- 运行Controller
$ make run
2023-03-02T14:01:52+08:00 INFO controller-runtime.metrics Metrics server is starting to listen {"addr": ":8080"}
2023-03-02T14:01:52+08:00 INFO setup starting manager
2023-03-02T14:01:52+08:00 INFO Starting server {"path": "/metrics", "kind": "metrics", "addr": "[::]:8080"}
2023-03-02T14:01:52+08:00 INFO Starting server {"kind": "health probe", "addr": "[::]:8081"}
2023-03-02T14:01:52+08:00 INFO Starting EventSource {"controller": "nginx", "controllerGroup": "devops.github.com", "controllerKind": "Nginx", "source": "kind source: *v1.Nginx"}
2023-03-02T14:01:52+08:00 INFO Starting Controller {"controller": "nginx", "controllerGroup": "devops.github.com", "controllerKind": "Nginx"}
2023-03-02T14:01:53+08:00 INFO Starting workers {"controller": "nginx", "controllerGroup": "devops.github.com", "controllerKind": "Nginx", "worker count": 1}
2023-03-02T14:01:53+08:00 INFO controllers.nginx
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2023-03-02T14:01:53+08:00 INFO controllers.nginx.Reconcile 查询CRD实例: 开始 {"命名空间/名称": "default/nginx-sample"}
2023-03-02T14:01:53+08:00 INFO controllers.nginx.Reconcile 查询CRD实例: 结束 {"命名空间/名称": "default/nginx-sample", "详情": {"apiVersion": "devops.github.com/v1", "kind": "Nginx", "namespace": "default", "name": "nginx-sample"}}
2023-03-02T14:01:53+08:00 INFO controllers.nginx.Reconcile 判断CRD实例是否匹配 AnnotationFilter: 开始 {"命名空间/名称": "default/nginx-sample"}
2023-03-02T14:01:53+08:00 INFO controllers.nginx.shouldManageNginx 判断CRD实例是否匹配AnnotationFilter: 执行 {"命名空间": "default"}
2023-03-02T14:01:53+08:00 INFO controllers.nginx.Reconcile 判断CRD实例是否匹配 AnnotationFilter: 结束 {"命名空间/名称": "default/nginx-sample"}
2023-03-02T14:01:53+08:00 INFO controllers.nginx.Reconcile 处理CRD实例: 开始 {"命名空间/名称": "default/nginx-sample"}- 安装CR
# 安装
$ kubectl apply -f config/samples/
# 查看
$ kubectl get nginx
NAME CURRENT DESIRED AGE
nginx-sample 1 19h
$ kubectl get hpa
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
default-auto-scaled-nginx-sample Nginx/nginx-sample 33%/45% 1 10 1 21h
$ kubectl get deploy,pod,svc,ing -l devops.github.com/app=nginx
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/nginx-sample 1/1 1 1 23s
NAME READY STATUS RESTARTS AGE
pod/nginx-sample-6cc8c7cfd9-jcgkp 1/1 Running 0 22s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/nginx-sample-service ClusterIP 10.68.93.224 <none> 80/TCP,443/TCP 22s
NAME CLASS HOSTS ADDRESS PORTS AGE
ingress.networking.k8s.io/nginx-sample-ingress nginx dev-01.devops.com,ops-01.devops.com 80, 443 22s- 测试
$ curl -i https://dev-01.devops.com/healthz
HTTP/1.1 200 OK
Date: Thu, 02 Mar 2023 06:07:32 GMT
Content-Type: text/plain
Content-Length: 8
Connection: keep-alive
Strict-Transport-Security: max-age=15724800; includeSubDomains
WORKINGCopyright 2023.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.