zoukankan      html  css  js  c++  java
  • kubebuilder实战之六:构建部署运行

    欢迎访问我的GitHub

    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;

    你不孤单,欣宸原创一路相伴

    1. Java系列
    2. Spring系列
    3. Docker系列
    4. kubernetes系列
    5. 数据库+中间件系列
    6. DevOps系列

    欢迎关注公众号:程序员欣宸

    微信搜索「程序员欣宸」,我是欣宸,期待与您一同畅游Java世界...
    https://github.com/zq2599/blog_demos

  • 相关阅读:
    数据库练习
    pymysql
    数据库索引
    数据库查询
    数据库操作
    数据库建表
    数据库初识
    shell 编程
    Struts2与SpringMVC
    SpringAOP
  • 原文地址:https://www.cnblogs.com/bolingcavalry/p/15208633.html
Copyright © 2011-2022 走看看