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https://github.com/zq2599/blog_demos

内容:所有原创文章分类汇总及配套源码,涉及Java、Docker、Kubernetes、DevOPS等;

系列文章链接

  1. kubebuilder实战之一:准备工作
  2. kubebuilder实战之二:初次体验kubebuilder
  3. kubebuilder实战之三:基础知识速览
  4. kubebuilder实战之四:operator需求说明和设计
  5. kubebuilder实战之五:operator编码
  6. kubebuilder实战之六:构建部署运行
  7. kubebuilder实战之七:webhook
  8. kubebuilder实战之八:知识点小记

本篇概览

  • 作为《kubebuilder实战》系列的第六篇,前面已完成了编码,现在到了验证功能的环节,请确保您的docker和kubernetes环境正常,然后咱们一起完成以下操作:
  1. 部署CRD
  2. 本地运行Controller
  3. 通过yaml文件新建elasticweb资源对象
  4. 通过日志和kubectl命令验证elasticweb功能是否正常
  5. 浏览器访问web,验证业务服务是否正常
  6. 修改singlePodQPS,看elasticweb是否自动调整pod数量
  7. 修改totalQPS,看elasticweb是否自动调整pod数
  8. 删除elasticweb,看相关的service和deployment被自动删除
  9. 构建Controller镜像,在kubernetes运行此Controller,验证上述功能是否正常
  • 看似简单的部署验证操作,零零散散加起来居然有这么多…好吧不感慨了,立即开始吧;

部署CRD

  • 从控制台进入Makefile所在目录,执行命令make install,即可将CRD部署到kubernetes:
zhaoqin@zhaoqindeMBP-2 elasticweb % make install
/Users/zhaoqin/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
kustomize build config/crd | kubectl apply -f -
Warning: apiextensions.k8s.io/v1beta1 CustomResourceDefinition is deprecated in v1.16+, unavailable in v1.22+; use apiextensions.k8s.io/v1 CustomResourceDefinition
customresourcedefinition.apiextensions.k8s.io/elasticwebs.elasticweb.com.bolingcavalry configured
  • 从上述内容可见,实际上执行的操作是用kustomize将config/crd下的yaml资源合并后在kubernetes进行创建;

  • 可以用命令kubectl api-versions验证CRD部署是否成功:

zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl api-versions|grep elasticweb
elasticweb.com.bolingcavalry/v1

本地运行Controller

  • 先尝试用最简单的方式来验证Controller的功能,如下图,Macbook电脑是我的开发环境,直接用elasticweb工程中的Makefile,可以将Controller的代码在本地运行起来里面:

在这里插入图片描述

  • 进入Makefile文件所在目录,执行命令make run即可编译运行controller:
zhaoqin@zhaoqindeMBP-2 elasticweb % pwd
/Users/zhaoqin/github/blog_demos/kubebuilder/elasticweb
zhaoqin@zhaoqindeMBP-2 elasticweb % make run
/Users/zhaoqin/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
go fmt ./...
go vet ./...
/Users/zhaoqin/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
go run ./main.go
2021-02-20T20:46:16.774+0800    INFO    controller-runtime.metrics      metrics server is starting to listen    {"addr": ":8080"}
2021-02-20T20:46:16.774+0800    INFO    setup   starting manager
2021-02-20T20:46:16.775+0800    INFO    controller-runtime.controller   Starting EventSource    {"controller": "elasticweb", "source": "kind source: /, Kind="}
2021-02-20T20:46:16.776+0800    INFO    controller-runtime.manager      starting metrics server {"path": "/metrics"}
2021-02-20T20:46:16.881+0800    INFO    controller-runtime.controller   Starting Controller     {"controller": "elasticweb"}
2021-02-20T20:46:16.881+0800    INFO    controller-runtime.controller   Starting workers        {"controller": "elasticweb", "worker count": 1}

新建elasticweb资源对象

  • 负责处理elasticweb的Controller已经运行起来了,接下来就开始创建elasticweb资源对象吧,用yaml文件来创建;

  • config/samples目录下,kubebuilder为咱们创建了demo文件elasticweb_v1_elasticweb.yaml,不过这里面spec的内容不是咱们定义的那四个字段,需要改成以下内容:

apiVersion: v1
kind: Namespace
metadata:
  name: dev
  labels:
    name: dev
---
apiVersion: elasticweb.com.bolingcavalry/v1
kind: ElasticWeb
metadata:
  namespace: dev
  name: elasticweb-sample
spec:
  # Add fields here
  image: tomcat:8.0.18-jre8
  port: 30003
  singlePodQPS: 500
  totalQPS: 600
  • 对上述配置的几个参数做如下说明:
  1. 使用的namespace为dev
  2. 本次测试部署的应用为tomcat
  3. service使用宿主机的30003端口暴露tomcat的服务
  4. 假设单个pod能支撑500QPS,外部请求的QPS为600
  • 执行命令kubectl apply -f config/samples/elasticweb_v1_elasticweb.yaml,即可在kubernetes创建elasticweb实例:
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl apply -f config/samples/elasticweb_v1_elasticweb.yaml
namespace/dev created
elasticweb.elasticweb.com.bolingcavalry/elasticweb-sample created
  • 去controller的窗口发现打印了不少日志,通过分析日志发现Reconcile方法执行了两次,第一执行时创建了deployment和service等资源:
2021-02-21T10:03:57.108+0800    INFO    controllers.ElasticWeb  1. start reconcile logic        {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.108+0800    INFO    controllers.ElasticWeb  3. instance : Image [tomcat:8.0.18-jre8], Port [30003], SinglePodQPS [500], TotalQPS [600], RealQPS [nil]       {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.210+0800    INFO    controllers.ElasticWeb  4. deployment not exists        {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.313+0800    INFO    controllers.ElasticWeb  set reference   {"func": "createService"}
2021-02-21T10:03:57.313+0800    INFO    controllers.ElasticWeb  start create service    {"func": "createService"}
2021-02-21T10:03:57.364+0800    INFO    controllers.ElasticWeb  create service success  {"func": "createService"}
2021-02-21T10:03:57.365+0800    INFO    controllers.ElasticWeb  expectReplicas [2]      {"func": "createDeployment"}
2021-02-21T10:03:57.365+0800    INFO    controllers.ElasticWeb  set reference   {"func": "createDeployment"}
2021-02-21T10:03:57.365+0800    INFO    controllers.ElasticWeb  start create deployment {"func": "createDeployment"}
2021-02-21T10:03:57.382+0800    INFO    controllers.ElasticWeb  create deployment success       {"func": "createDeployment"}
2021-02-21T10:03:57.382+0800    INFO    controllers.ElasticWeb  singlePodQPS [500], replicas [2], realQPS[1000] {"func": "updateStatus"}
2021-02-21T10:03:57.407+0800    DEBUG   controller-runtime.controller   Successfully Reconciled {"controller": "elasticweb", "request": "dev/elasticweb-sample"}
2021-02-21T10:03:57.407+0800    INFO    controllers.ElasticWeb  1. start reconcile logic        {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.407+0800    INFO    controllers.ElasticWeb  3. instance : Image [tomcat:8.0.18-jre8], Port [30003], SinglePodQPS [500], TotalQPS [600], RealQPS [1000]      {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.407+0800    INFO    controllers.ElasticWeb  9. expectReplicas [2], realReplicas [2] {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.407+0800    INFO    controllers.ElasticWeb  10. return now  {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T10:03:57.407+0800    DEBUG   controller-runtime.controller   Successfully Reconciled {"controller": "elasticweb", "request": "dev/elasticweb-sample"}
  • 再用kubectl get命令详细检查资源对象,一切符合预期,elasticweb、service、deployment、pod都是正常的:
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl apply -f config/samples/elasticweb_v1_elasticweb.yaml
namespace/dev created
elasticweb.elasticweb.com.bolingcavalry/elasticweb-sample created
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get elasticweb -n dev                                 
NAME                AGE
elasticweb-sample   35s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get service -n dev                                    
NAME                TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
elasticweb-sample   NodePort   10.107.177.158   <none>        8080:30003/TCP   41s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get deployment -n dev                                 
NAME                READY   UP-TO-DATE   AVAILABLE   AGE
elasticweb-sample   2/2     2            2           46s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev                                        
NAME                                 READY   STATUS    RESTARTS   AGE
elasticweb-sample-56fc5848b7-l5thk   1/1     Running   0          50s
elasticweb-sample-56fc5848b7-lqjk5   1/1     Running   0          50s

浏览器验证业务功能

  • 本次部署操作使用的docker镜像是tomcat,验证起来非常简单,打开默认页面能见到猫就证明tomcat启动成功了,我这kubernetes宿主机的IP地址是192.168.50.75,于是用浏览器访问http://192.168.50.75:30003,如下图,业务功能正常:

在这里插入图片描述

修改单个Pod的QPS

  • 如果自身优化,或者外界依赖变化(如缓存、数据库扩容),这些都可能导致当前服务的QPS提升,假设单个Pod的QPS从500提升到了800,看看咱们的Operator能不能自动做出调整(总QPS是600,因此pod数应该从2降到1)

  • config/samples/目录下新增名为update_single_pod_qps.yaml的文件,内容如下:

spec:
  singlePodQPS: 800
  • 执行以下命令,即可将单个Pod的QPS从500更新为800(注意,参数type很重要别漏了):
kubectl patch elasticweb elasticweb-sample \
-n dev \
--type merge \
--patch "$(cat config/samples/update_single_pod_qps.yaml)"
  • 此时去看controller日志,如下图,红框1表示spec已经更新,红框2则表示用最新的参数计算出来的pod数量,符合预期:

在这里插入图片描述

  • 用kubectl get命令检查pod,可见已经降到1个了:
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev                                                                                       
NAME                                 READY   STATUS    RESTARTS   AGE
elasticweb-sample-56fc5848b7-l5thk   1/1     Running   0          30m
  • 记得用浏览器检查tomcat是否正常;

修改总QPS

  • 外部QPS也在频繁变化中,咱们的operator也需要根据总QPS及时调节pod实例,以确保整体服务质量,接下来咱们就修改总QPS,看operator是否生效:

  • config/samples/目录下新增名为update_total_qps.yaml的文件,内容如下:

spec:
  totalQPS: 2600
  • 执行以下命令,即可将总QPS从600更新为2600(注意,参数type很重要别漏了):
kubectl patch elasticweb elasticweb-sample \
-n dev \
--type merge \
--patch "$(cat config/samples/update_total_qps.yaml)"
  • 此时去看controller日志,如下图,红框1表示spec已经更新,红框2则表示用最新的参数计算出来的pod数量,符合预期:

在这里插入图片描述

  • 用kubectl get命令检查pod,可见已经增长到4个,4个pd的能支撑的QPS为3200,满足了当前2600的要求:
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev
NAME                                 READY   STATUS    RESTARTS   AGE
elasticweb-sample-56fc5848b7-8n7tq   1/1     Running   0          8m22s
elasticweb-sample-56fc5848b7-f2lpb   1/1     Running   0          8m22s
elasticweb-sample-56fc5848b7-l5thk   1/1     Running   0          48m
elasticweb-sample-56fc5848b7-q8p5f   1/1     Running   0          8m22s
  • 记得用浏览器检查tomcat是否正常;
  • 聪明的您一定会觉得用这个方法来调节pod数太low了,呃…您说得没错确实low,但您可以自己开发一个应用,收到当前QPS后自动调用client-go去修改elasticweb的totalQPS,让operator及时调整pod数,这也勉强算自动调节了……吧

删除验证

  • 目前整个dev这个namespace下有service、deployment、pod、elasticweb这些资源对象,如果要全部删除,只需删除elasticweb即可,因为service和deployment都和elasticweb建立的关联关系,代码如下图红框:

在这里插入图片描述

  • 执行删除elasticweb的命令:
kubectl delete elasticweb elasticweb-sample -n dev
  • 再去查看其他资源,都被自动删除了:
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl delete elasticweb elasticweb-sample -n dev
elasticweb.elasticweb.com.bolingcavalry "elasticweb-sample" deleted
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev                            
NAME                                 READY   STATUS        RESTARTS   AGE
elasticweb-sample-56fc5848b7-9lcww   1/1     Terminating   0          45s
elasticweb-sample-56fc5848b7-n7p7f   1/1     Terminating   0          45s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev
NAME                                 READY   STATUS        RESTARTS   AGE
elasticweb-sample-56fc5848b7-n7p7f   0/1     Terminating   0          73s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev
No resources found in dev namespace.
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get deployment -n dev
No resources found in dev namespace.
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get service -n dev   
No resources found in dev namespace.
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get namespace dev 
NAME   STATUS   AGE
dev    Active   97s

构建镜像

  1. 前面咱们在开发环境将controller运行起来尝试了所有功能,在实际生产环境中,controller并非这样独立于kubernetes之外,而是以pod的状态运行在kubernetes之中,接下来咱们尝试将controller代码编译构建成docker镜像,再在kubernetes上运行起来;
  2. 要做的第一件事,就是在前面的controller控制台上执行Ctrl+C,把那个controller停掉;
  3. 这里有个要求,就是您要有个kubernetes可以访问的镜像仓库,例如局域网内的Harbor,或者公共的hub.docker.com,我这为了操作方便选择了hub.docker.com,使用它的前提是拥有hub.docker.com的注册帐号;
  4. 在kubebuilder电脑上,打开一个控制台,执行docker login命令登录,根据提示输入hub.docker.com的帐号和密码,这样就可以在当前控制台上执行docker push命令将镜像推送到hub.docker.com上了(这个网站的网络很差,可能要登录好几次才能成功);
  5. 执行以下命令构建docker镜像并推送到hub.docker.com,镜像名为bolingcavalry/elasticweb:002
make docker-build docker-push IMG=bolingcavalry/elasticweb:002
  1. hub.docker.com的网络状况不是一般的差,kubebuilder电脑上的docker一定要设置镜像加速,上述命令如果遭遇超时失败,请重试几次,此外,构建过程中还会下载诸多go模块的依赖,也需要您耐心等待,也很容易遇到网络问题,需要多次重试,所以,最好是使用局域网内搭建的Habor服务;
  2. 最终,命令执行成功后输出如下:
zhaoqin@zhaoqindeMBP-2 elasticweb % make docker-build docker-push IMG=bolingcavalry/elasticweb:002
/Users/zhaoqin/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
go fmt ./...
go vet ./...
/Users/zhaoqin/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
go test ./... -coverprofile cover.out
?       elasticweb      [no test files]
?       elasticweb/api/v1       [no test files]
ok      elasticweb/controllers  8.287s  coverage: 0.0% of statements
docker build . -t bolingcavalry/elasticweb:002
[+] Building 146.8s (17/17) FINISHED                                                                                                                                                                                                  
 => [internal] load build definition from Dockerfile                                                                                                                                                                             0.1s
 => => transferring dockerfile: 37B                                                                                                                                                                                              0.0s
 => [internal] load .dockerignore                                                                                                                                                                                                0.0s
 => => transferring context: 2B                                                                                                                                                                                                  0.0s
 => [internal] load metadata for gcr.io/distroless/static:nonroot                                                                                                                                                                1.8s
 => [internal] load metadata for docker.io/library/golang:1.13                                                                                                                                                                   0.7s
 => [builder 1/9] FROM docker.io/library/golang:1.13@sha256:8ebb6d5a48deef738381b56b1d4cd33d99a5d608e0d03c5fe8dfa3f68d41a1f8                                                                                                     0.0s
 => [stage-1 1/3] FROM gcr.io/distroless/static:nonroot@sha256:b89b98ea1f5bc6e0b48c8be6803a155b2a3532ac6f1e9508a8bcbf99885a9152                                                                                                  0.0s
 => [internal] load build context                                                                                                                                                                                                0.0s
 => => transferring context: 14.51kB                                                                                                                                                                                             0.0s
 => CACHED [builder 2/9] WORKDIR /workspace                                                                                                                                                                                      0.0s
 => CACHED [builder 3/9] COPY go.mod go.mod                                                                                                                                                                                      0.0s
 => CACHED [builder 4/9] COPY go.sum go.sum                                                                                                                                                                                      0.0s
 => CACHED [builder 5/9] RUN go mod download                                                                                                                                                                                     0.0s
 => CACHED [builder 6/9] COPY main.go main.go                                                                                                                                                                                    0.0s
 => CACHED [builder 7/9] COPY api/ api/                                                                                                                                                                                          0.0s
 => [builder 8/9] COPY controllers/ controllers/                                                                                                                                                                                 0.1s
 => [builder 9/9] RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go                                                                                                                      144.5s
 => CACHED [stage-1 2/3] COPY --from=builder /workspace/manager .                                                                                                                                                                0.0s
 => exporting to image                                                                                                                                                                                                           0.0s
 => => exporting layers                                                                                                                                                                                                          0.0s
 => => writing image sha256:622d30aa44c77d93db4093b005fce86b39d5ba5c6cd29f1fb2accb7e7f9b23b8                                                                                                                                     0.0s
 => => naming to docker.io/bolingcavalry/elasticweb:002                                                                                                                                                                          0.0s
docker push bolingcavalry/elasticweb:002
The push refers to repository [docker.io/bolingcavalry/elasticweb]
eea77d209b68: Layer already exists 
8651333b21e7: Layer already exists 
002: digest: sha256:c09ab87f6fce3d85f1fda0ffe75ead9db302a47729aefd3ef07967f2b99273c5 size: 739
  1. 去hub.docker.com网站看看,如下图,新镜像已经上传,这样只要任何机器只要能上网就能pull此镜像到本地使用了:

在这里插入图片描述

  1. 镜像准备好之后,执行以下命令即可在kubernetes环境部署controller:
make deploy IMG=bolingcavalry/elasticweb:002
  1. 接下来像之前那样创建elasticweb资源对象,验证所有资源是否创建成功:
zhaoqin@zhaoqindeMBP-2 elasticweb % make deploy IMG=bolingcavalry/elasticweb:002
/Users/zhaoqin/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
cd config/manager && kustomize edit set image controller=bolingcavalry/elasticweb:002
kustomize build config/default | kubectl apply -f -
namespace/elasticweb-system created
Warning: apiextensions.k8s.io/v1beta1 CustomResourceDefinition is deprecated in v1.16+, unavailable in v1.22+; use apiextensions.k8s.io/v1 CustomResourceDefinition
customresourcedefinition.apiextensions.k8s.io/elasticwebs.elasticweb.com.bolingcavalry configured
role.rbac.authorization.k8s.io/elasticweb-leader-election-role created
clusterrole.rbac.authorization.k8s.io/elasticweb-manager-role created
clusterrole.rbac.authorization.k8s.io/elasticweb-proxy-role created
Warning: rbac.authorization.k8s.io/v1beta1 ClusterRole is deprecated in v1.17+, unavailable in v1.22+; use rbac.authorization.k8s.io/v1 ClusterRole
clusterrole.rbac.authorization.k8s.io/elasticweb-metrics-reader created
rolebinding.rbac.authorization.k8s.io/elasticweb-leader-election-rolebinding created
clusterrolebinding.rbac.authorization.k8s.io/elasticweb-manager-rolebinding created
clusterrolebinding.rbac.authorization.k8s.io/elasticweb-proxy-rolebinding created
service/elasticweb-controller-manager-metrics-service created
deployment.apps/elasticweb-controller-manager created
zhaoqin@zhaoqindeMBP-2 elasticweb % 
zhaoqin@zhaoqindeMBP-2 elasticweb % 
zhaoqin@zhaoqindeMBP-2 elasticweb % 
zhaoqin@zhaoqindeMBP-2 elasticweb % 
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl apply -f config/samples/elasticweb_v1_elasticweb.yaml 
namespace/dev created
elasticweb.elasticweb.com.bolingcavalry/elasticweb-sample created
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get service -n dev  
NAME                TYPE       CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
elasticweb-sample   NodePort   10.96.234.7   <none>        8080:30003/TCP   13s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get deployment -n dev
NAME                READY   UP-TO-DATE   AVAILABLE   AGE
elasticweb-sample   2/2     2            2           18s
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pod -n dev     
NAME                                 READY   STATUS    RESTARTS   AGE
elasticweb-sample-56fc5848b7-559lw   1/1     Running   0          22s
elasticweb-sample-56fc5848b7-hp4wv   1/1     Running   0          22s
  1. 这还不够!还有个重要的信息需要咱们检查—controller的日志,先看有哪些pod:
zhaoqin@zhaoqindeMBP-2 elasticweb % kubectl get pods --all-namespaces
NAMESPACE           NAME                                             READY   STATUS    RESTARTS   AGE
dev                 elasticweb-sample-56fc5848b7-559lw               1/1     Running   0          68s
dev                 elasticweb-sample-56fc5848b7-hp4wv               1/1     Running   0          68s
elasticweb-system   elasticweb-controller-manager-5795d4d98d-t6jvc   2/2     Running   0          98s
kube-system         coredns-7f89b7bc75-5pdwc                         1/1     Running   15         20d
kube-system         coredns-7f89b7bc75-nvbvm                         1/1     Running   15         20d
kube-system         etcd-hedy                                        1/1     Running   15         20d
kube-system         kube-apiserver-hedy                              1/1     Running   15         20d
kube-system         kube-controller-manager-hedy                     1/1     Running   16         20d
kube-system         kube-flannel-ds-v84vc                            1/1     Running   22         20d
kube-system         kube-proxy-hlppx                                 1/1     Running   15         20d
kube-system         kube-scheduler-hedy                              1/1     Running   16         20d
test-clientset      client-test-deployment-7677cc9669-kd7l7          1/1     Running   9          9d
test-clientset      client-test-deployment-7677cc9669-kt5rv          1/1     Running   9          9d
  1. 可见controller的pod名称为elasticweb-controller-manager-5795d4d98d-t6jvc,执行以下命令可以查看日志,多了-c manager参数是因为这个pod里面有两个容器,需要指定正确的容器才能看到日志:
kubectl logs -f \
elasticweb-controller-manager-5795d4d98d-t6jvc \
-c manager \
-n elasticweb-system
  1. 再次看到了熟悉的业务日志:
2021-02-21T08:52:27.064Z        INFO    controllers.ElasticWeb  1. start reconcile logic        {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.064Z        INFO    controllers.ElasticWeb  3. instance : Image [tomcat:8.0.18-jre8], Port [30003], SinglePodQPS [500], TotalQPS [600], RealQPS [nil]       {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.064Z        INFO    controllers.ElasticWeb  4. deployment not exists        {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.064Z        INFO    controllers.ElasticWeb  set reference   {"func": "createService"}
2021-02-21T08:52:27.064Z        INFO    controllers.ElasticWeb  start create service    {"func": "createService"}
2021-02-21T08:52:27.107Z        INFO    controllers.ElasticWeb  create service success  {"func": "createService"}
2021-02-21T08:52:27.107Z        INFO    controllers.ElasticWeb  expectReplicas [2]      {"func": "createDeployment"}
2021-02-21T08:52:27.107Z        INFO    controllers.ElasticWeb  set reference   {"func": "createDeployment"}
2021-02-21T08:52:27.107Z        INFO    controllers.ElasticWeb  start create deployment {"func": "createDeployment"}
2021-02-21T08:52:27.119Z        INFO    controllers.ElasticWeb  create deployment success       {"func": "createDeployment"}
2021-02-21T08:52:27.119Z        INFO    controllers.ElasticWeb  singlePodQPS [500], replicas [2], realQPS[1000] {"func": "updateStatus"}
2021-02-21T08:52:27.198Z        DEBUG   controller-runtime.controller   Successfully Reconciled {"controller": "elasticweb", "request": "dev/elasticweb-sample"}
2021-02-21T08:52:27.198Z        INFO    controllers.ElasticWeb  1. start reconcile logic        {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.198Z        INFO    controllers.ElasticWeb  3. instance : Image [tomcat:8.0.18-jre8], Port [30003], SinglePodQPS [500], TotalQPS [600], RealQPS [1000]      {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.198Z        INFO    controllers.ElasticWeb  9. expectReplicas [2], realReplicas [2] {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.198Z        INFO    controllers.ElasticWeb  10. return now  {"elasticweb": "dev/elasticweb-sample"}
2021-02-21T08:52:27.198Z        DEBUG   controller-runtime.controller   Successfully Reconciled {"controller": "elasticweb", "request": "dev/elasticweb-sample"}
  1. 再用浏览器验证tomcat已经启动成功;

卸载和清理

  • 体验完毕后,如果想把前面创建的资源全部清理掉(注意,是清理资源,不是资源对象),可以执行以下命令:
make uninstall
  • 至此,整个operator的设计、开发、部署、验证流程就全部完成了,在您的operator开发过程中,希望本文能给您带来一些参考;

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