blade create k8s node-process

介绍
kubernetes 节点进程相关场景，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 node-process kill 杀节点上指定进程，同 [blade create process kill](blade create process kill.md)
blade create k8s node-process stop 挂起节点上指定进程，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：
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--evict-count string     限制实验生效的数量
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--evict-percent string   限制实验生效数量的百分比，不包含 %
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--labels string          节点资源标签
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--names string           节点资源名，多个资源名之间使用逗号分隔
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--kubeconfig string      kubeconfig 文件全路径（仅限使用 blade 命令调用时使用）
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--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
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案例
杀指定 cn-hangzhou.192.168.0.205 节点上 kubelet 进程
yaml配置方式如下
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apiVersion: chaosblade.io/v1alpha1
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kind: ChaosBlade
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metadata:
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  name: kill-node-process-by-names
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spec:
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  experiments:
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  - scope: node
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    target: process
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    action: kill
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    desc: "kill node process by names"
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    matchers:
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    - name: names
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      value: ["cn-hangzhou.192.168.0.205"]
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    - name: process
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      value: ["redis-server"]
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可以看到执行前后，redis-server 的进程号发生改变，说明被杀掉后，又被重新拉起
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# ps -ef | grep redis-server
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19497 root      2:05 redis-server *:6379
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​
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# ps -ef | grep redis-server
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31855 root      0:00 redis-server *:6379
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通过 kubectl get blade kill-node-process-by-names -o json 可以查看详细的执行结果(下发只截取部分内容)
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{
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    "apiVersion": "v1",
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    "items": [
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        {
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            "apiVersion": "chaosblade.io/v1alpha1",
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            "kind": "ChaosBlade",
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            "metadata": {
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                "finalizers": [
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                    "finalizer.chaosblade.io"
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                ],
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                "generation": 1,
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                "name": "kill-node-process-by-names",
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                "resourceVersion": "9421288",
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                "selfLink": "/apis/chaosblade.io/v1alpha1/chaosblades/kill-node-process-by-names",
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                "uid": "24aed084-ff70-11e9-8883-00163e0ad0b3"
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            },
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            "status": {
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                "expStatuses": [
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                    {
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                        "action": "kill",
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                        "resStatuses": [
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                            {
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                                "id": "ebe34959424fb022",
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                                "kind": "node",
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                                "name": "cn-hangzhou.192.168.0.205",
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                                "nodeName": "cn-hangzhou.192.168.0.205",
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                                "state": "Success",
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                                "success": true,
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                                "uid": "e179b30d-df77-11e9-b3be-00163e136d88"
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                            }
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                        ],
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                        "scope": "node",
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                        "state": "Success",
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                        "success": true,
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                        "target": "process"
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                    }
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                ],
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                "phase": "Running"
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            }
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        }
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    ],
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}
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执行以下命令停止实验：
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kubectl delete -f kill_node_process_by_names.yaml
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或者直接删除 blade 资源：
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kubectl delete blade kill-node-process-by-names
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blade 执行方式
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blade create k8s node-process kill --process redis-server --names cn-hangzhou.192.168.0.205 --kubeconfig config
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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：
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{"code":200,"success":true,"result":"fc93e5bbe4827d4b"}
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可通过以下命令查询实验状态：
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blade query k8s create fc93e5bbe4827d4b --kubeconfig config
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​
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{"code":200,"success":true,"result":{"uid":"fc93e5bbe4827d4b","success":true,"error":"","statuses":[{"id":"859c56e6850c1c1b","uid":"e179b30d-df77-11e9-b3be-00163e136d88","name":"cn-hangzhou.192.168.0.205","state":"Success","kind":"node","success":true,"nodeName":"cn-hangzhou.192.168.0.205"}]}}
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销毁实验：
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blade destroy fc93e5bbe4827d4b
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常见问题
其他问题参考 [blade create k8s](blade create k8s.md) 常见问题

blade create k8s node-network

blade create k8s node-disk

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