blade create k8s container-process

介绍

kubernetes 下 容器内进程场景，同基础资源的进程场景

命令

支持的进程场景命令如下：

• blade create k8s container-process kill 杀容器内指定进程，同 [blade create process kill](blade create process kill.md)

• blade create k8s container-process stop 挂起容器内指定进程，同 [blade create process stop](blade create process stop.md)

参数

除了上述基础场景各自所需的参数外，在 kubernetes 环境下，还支持的参数如下：

--container-ids string     容器ID，支持配置多个
--container-names string   容器名称，支持配置多个
--docker-endpoint string   Docker server 地址，默认为本地的 /var/run/docker.sock
--namespace string       Pod 所属的命名空间，只能填写一个值，必填项
--evict-count string     限制实验生效的数量
--evict-percent string   限制实验生效数量的百分比，不包含 %
--labels string          Pod 资源标签，多个标签之前是或的关系
--names string           Pod 资源名
--kubeconfig string      kubeconfig 文件全路径（仅限使用 blade 命令调用时使用）
--waiting-time string    实验结果等待时间，默认为 20s，参数值要包含单位，例如 10s，1m

案例

指定 default 命名空间下 Pod 名是 frontend-d89756ff7-tl4xl，容器id为 f1de335b4eeaf，进程名为 top 的进程。

yaml 配置方式

apiVersion: chaosblade.io/v1alpha1
kind: ChaosBlade
metadata:
  name: kill-container-process-by-id
spec:
  experiments:
  - scope: container
    target: process
    action: kill
    desc: "kill container process by id"
    matchers:
    - name: container-ids
      value:
      - "f1de335b4eeaf"
    - name: process
      value: ["top"]
    - name: names
      value: ["frontend-d89756ff7-tl4xl"]

例如配置好文件后，保存为 kill_container_process_by_id.yaml ，使用以下命令执行实验场景：

kubectl apply -f kill_container_process_by_id.yaml 

可通过以下命令查看每个实验的执行状态：

kubectl get blade kill-container-process-by-id -o json

{
   "apiVersion": "chaosblade.io/v1alpha1",
   "kind": "ChaosBlade",
   "metadata": {
       "finalizers": [
           "finalizer.chaosblade.io"
       ],
       "generation": 1,
       "name": "kill-container-process-by-id",
       "resourceVersion": "9438733",
       "selfLink": "/apis/chaosblade.io/v1alpha1/chaosblades/kill-container-process-by-id",
       "uid": "a5a597be-ff7e-11e9-a8e2-00163e08a39b"
   },
   "status": {
       "expStatuses": [
           {
               "action": "kill",
               "resStatuses": [
                   {
                       "id": "10cdc57b9c80a9f0",
                       "kind": "container",
                       "name": "php-redis",
                       "nodeName": "cn-hangzhou.192.168.0.204",
                       "state": "Success",
                       "success": true,
                       "uid": "f1de335b4eeaf035b8d23a87080f3d24cebc803cbb6ad15e5fe0d8567e2e8939"
                   }
               ],
               "scope": "container",
               "state": "Success",
               "success": true,
               "target": "process"
           }
       ],
       "phase": "Running"
   }
}

使用以下命令停止实验：

kubectl delete -f kill_container_process_by_id.yaml 

注意，停止实验不会恢复已杀掉的进程！！

blade 命令执行方式

blade create k8s container-process kill --process top --names frontend-d89756ff7-tl4xl --container-ids f1de335b4eeaf --namespace default --kubeconfig config

如果执行失败，会返回详细的错误信息；如果执行成功，会返回实验的 UID：

{"code":200,"success":true,"result":"06d5ebae60e8fe3f"}

可通过以下命令查询实验状态：

blade query k8s create 06d5ebae60e8fe3f --kubeconfig config

{"code":200,"success":true,"result":{"uid":"06d5ebae60e8fe3f","success":true,"error":"","statuses":[{"id":"1000cbd2018e2c90","uid":"f1de335b4eeaf035b8d23a87080f3d24cebc803cbb6ad15e5fe0d8567e2e8939","name":"php-redis","state":"Success","kind":"container","success":true,"nodeName":"cn-hangzhou.192.168.0.204"}]}}

销毁实验：

blade destroy 06d5ebae60e8fe3f

常见问题

Q: 如果状态如下：

"status": {
        "expStatuses": [
            {
                "action": "kill",
                "error": "see resStatus for the error details",
                "resStatuses": [
                    {
                        "kind": "container",
                        "name": "slave",
                        "nodeName": "cn-hangzhou.192.168.0.204",
                        "state": "Error",
                        "success": false,
                        "uid": "c3175f916e87fe06c339712427758f3d51dcb38d3e71cfae168bbbdfeab86710"
                    }
                ],
                "scope": "container",
                "state": "Error",
                "success": false,
                "target": "process"
            }
        ],
        "phase": "Error"
    }

A: 其实已经执行，只是返回结果有乱码；删除实验，重新执行实验即可

Q:

"status": {
        "expStatuses": [
            {
                "action": "kill",
                "error": "the resources not found",
                "scope": "container",
                "state": "Error",
                "success": false,
                "target": "process"
            }
        ],
        "phase": "Error"
    }

A: container 没有找到

Q:

"status": {
        "expStatuses": [
            {
                "action": "kill",
                "error": "see resStatus for the error details",
                "resStatuses": [
                    {
                        "error": "top process not found exit status 1",
                        "kind": "container",
                        "name": "php-redis",
                        "nodeName": "cn-hangzhou.192.168.0.204",
                        "state": "Error",
                        "success": false,
                        "uid": "f1de335b4eeaf035b8d23a87080f3d24cebc803cbb6ad15e5fe0d8567e2e8939"
                    }
                ],
                "scope": "container",
                "state": "Error",
                "success": false,
                "target": "process"
            }
        ],
        "phase": "Error"
    }

A：目标进程找不到

其他问题参考 [blade create k8s](blade create k8s.md) 常见问题