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KubeEye Kubernetes集群自动巡检工具

1854540 2022-05-10 | zip | 0.42 MB | 次下载 | 2积分

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资料介绍

授权协议 Apache

开发语言 Google Go

操作系统跨平台

软件类型开源软件

所属分类云计算、 PaaS系统/容器

软件简介

KubeEye 旨在发现 Kubernetes 上的各种问题，比如应用配置错误（使用Polaris）、集群组件不健康和节点问题（使用Node-Problem-Detector）。除了预定义的规则，它还支持自定义规则。

架构图

KubeEye 通过调用Kubernetes API，通过常规匹配日志中的关键错误信息和容器语法的规则匹配来获取集群诊断数据，详见架构。

怎么使用

机器上安装 KubeEye
- 从 Releases 中下载预构建的可执行文件。
- 或者你也可以从源代码构建
```
git clone https://github.com/kubesphere/kubeeye.git
cd kubeeye 
make install
```
[可选] 安装 Node-problem-Detector
注意：这一行将在你的集群上安装 npd，只有当你想要详细的报告时才需要。
ke install npd
KubeEye 执行

root@node1:# ke diag
NODENAME        SEVERITY     HEARTBEATTIME               REASON              MESSAGE
node18          Fatal        2020-11-19T10:32:03+08:00   NodeStatusUnknown   Kubelet stopped posting node status.
node19          Fatal        2020-11-19T10:31:37+08:00   NodeStatusUnknown   Kubelet stopped posting node status.
node2           Fatal        2020-11-19T10:31:14+08:00   NodeStatusUnknown   Kubelet stopped posting node status.
node3           Fatal        2020-11-27T17:36:53+08:00   KubeletNotReady     Container runtime not ready: RuntimeReady=false reason:DockerDaemonNotReady message:docker: failed to get docker version: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

NAME            SEVERITY     TIME                        MESSAGE
scheduler       Fatal        2020-11-27T17:09:59+08:00   Get http://127.0.0.1:10251/healthz: dial tcp 127.0.0.1:10251: connect: connection refused
etcd-0          Fatal        2020-11-27T17:56:37+08:00   Get https://192.168.13.8:2379/health: dial tcp 192.168.13.8:2379: connect: connection refused

NAMESPACE       SEVERITY     PODNAME                                          EVENTTIME                   REASON                MESSAGE
default         Warning      node3.164b53d23ea79fc7                           2020-11-27T17:37:34+08:00   ContainerGCFailed     rpc error: code = Unknown desc = Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
default         Warning      node3.164b553ca5740aae                           2020-11-27T18:03:31+08:00   FreeDiskSpaceFailed   failed to garbage collect required amount of images. Wanted to free 5399374233 bytes, but freed 416077545 bytes
default         Warning      nginx-b8ffcf679-q4n9v.16491643e6b68cd7           2020-11-27T17:09:24+08:00   Failed                Error: ImagePullBackOff
default         Warning      node3.164b5861e041a60e                           2020-11-27T19:01:09+08:00   SystemOOM             System OOM encountered, victim process: stress, pid: 16713
default         Warning      node3.164b58660f8d4590                           2020-11-27T19:01:27+08:00   OOMKilling            Out of memory: Kill process 16711 (stress) score 205 or sacrifice child Killed process 16711 (stress), UID 0, total-vm:826516kB, anon-rss:819296kB, file-rss:0kB, shmem-rss:0kB
insights-agent  Warning      workloads-1606467120.164b519ca8c67416            2020-11-27T16:57:05+08:00   DeadlineExceeded      Job was active longer than specified deadline
kube-system     Warning      calico-node-zvl9t.164b3dc50580845d               2020-11-27T17:09:35+08:00   DNSConfigForming      Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 100.64.11.3 114.114.114.114 119.29.29.29
kube-system     Warning      kube-proxy-4bnn7.164b3dc4f4c4125d                2020-11-27T17:09:09+08:00   DNSConfigForming      Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 100.64.11.3 114.114.114.114 119.29.29.29
kube-system     Warning      nodelocaldns-2zbhh.164b3dc4f42d358b              2020-11-27T17:09:14+08:00   DNSConfigForming      Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 100.64.11.3 114.114.114.114 119.29.29.29


NAMESPACE       SEVERITY     NAME                      KIND         TIME                        MESSAGE
kube-system     Warning      node-problem-detector     DaemonSet    2020-11-27T17:09:59+08:00   [livenessProbeMissing runAsPrivileged]
kube-system     Warning      calico-node               DaemonSet    2020-11-27T17:09:59+08:00   [runAsPrivileged cpuLimitsMissing]
kube-system     Warning      nodelocaldns              DaemonSet    2020-11-27T17:09:59+08:00   [cpuLimitsMissing runAsPrivileged]
default         Warning      nginx                     Deployment   2020-11-27T17:09:59+08:00   [cpuLimitsMissing livenessProbeMissing tagNotSpecified]
insights-agent  Warning      workloads                 CronJob      2020-11-27T17:09:59+08:00   [livenessProbeMissing]
insights-agent  Warning      cronjob-executor          Job          2020-11-27T17:09:59+08:00   [livenessProbeMissing]
kube-system     Warning      calico-kube-controllers   Deployment   2020-11-27T17:09:59+08:00   [cpuLimitsMissing livenessProbeMissing]
kube-system     Warning      coredns                   Deployment   2020-11-27T17:09:59+08:00   [cpuLimitsMissing]

您可以参考常见FAQ内容来优化您的集群。

KubeEye 能做什么

KubeEye 可以发现你的集群控制平面的问题，包括 kube-apiserver/kube-controller-manager/etcd 等。
KubeEye 可以帮助你检测各种节点问题，包括内存/CPU/磁盘压力，意外的内核错误日志等。
KubeEye 根据行业最佳实践验证你的工作负载 yaml 规范，帮助你使你的集群稳定。

检查项

是/否	检查项	描述
	ETCDHealthStatus	如果 etcd 启动并正常运行
	ControllerManagerHealthStatus	如果 kubernetes kube-controller-manager 正常启动并运行
	SchedulerHealthStatus	如果 kubernetes kube-schedule 正常启动并运行
	NodeMemory	如果节点内存使用量超过阈值
	DockerHealthStatus	如果 docker 正常运行
	NodeDisk	如果节点磁盘使用量超过阈值
	KubeletHealthStatus	如果 kubelet 激活状态且正常运行
	NodeCPU	如果节点 CPU 使用量超过阈值
	NodeCorruptOverlay2	Overlay2 不可用
	NodeKernelNULLPointer	node 显示 NotReady
	NodeDeadlock	死锁是指两个或两个以上的进程在争夺资源时互相等待的现象。
	NodeOOM	监控那些消耗过多内存的进程，尤其是那些消耗大量内存非常快的进程，内核会杀掉它们，防止它们耗尽内存
	NodeExt4Error	Ext4 挂载失败
	NodeTaskHung	检查D状态下是否有超过 120s 的进程
	NodeUnregisterNetDevice	检查对应网络
	NodeCorruptDockerImage	检查 docker 镜像
	NodeAUFSUmountHung	检查存储
	NodeDockerHung	Docker hang住, 检查 docker 的日志
	PodSetLivenessProbe	如果为pod中的每一个容器设置了 livenessProbe
	PodSetTagNotSpecified	镜像地址没有声明标签或标签是最新
	PodSetRunAsPrivileged	以特权模式运行 Pod 意味着 Pod 可以访问主机的资源和内核功能
	PodSetImagePullBackOff	Pod 无法正确拉出镜像，因此可以在相应节点上手动拉出镜像
	PodSetImageRegistry	检查镜像形式是否在相应仓库
	PodSetCpuLimitsMissing	未声明 CPU 资源限制
	PodNoSuchFileOrDirectory	进入容器查看相应文件是否存在
	PodIOError	这通常是由于文件 IO 性能瓶颈
	PodNoSuchDeviceOrAddress	检查对应网络
	PodInvalidArgument	检查对应存储
	PodDeviceOrResourceBusy	检查对应的目录和 PID
	PodFileExists	检查现有文件
	PodTooManyOpenFiles	程序打开的文件/套接字连接数超过系统设置值
	PodNoSpaceLeftOnDevice	检查磁盘和索引节点的使用情况
	NodeApiServerExpiredPeriod	将检查 ApiServer 证书的到期日期少于30天
	PodSetCpuRequestsMissing	未声明 CPU 资源请求值
	PodSetHostIPCSet	设置主机 IP
	PodSetHostNetworkSet	设置主机网络
	PodHostPIDSet	设置主机 PID
	PodMemoryRequestsMiss	没有声明内存资源请求值
	PodSetHostPort	设置主机端口
	PodSetMemoryLimitsMissing	没有声明内存资源限制值
	PodNotReadOnlyRootFiles	文件系统未设置为只读
	PodSetPullPolicyNotAlways	镜像拉策略并非总是如此
	PodSetRunAsRootAllowed	以 root 用户执行
	PodDangerousCapabilities	您在 ALL / SYS_ADMIN / NET_ADMIN 等功能中有危险的选择
	PodlivenessProbeMissing	未声明 ReadinessProbe
	privilegeEscalationAllowed	允许特权升级
	NodeNotReadyAndUseOfClosedNetworkConnection	http 2-max-streams-per-connection
	NodeNotReady	无法启动 ContainerManager 无法设置属性 TasksAccounting 或未知属性

未标注的项目正在开发中

添加自定义检查规则

添加 npd 自定义检查规则

安装 NPD 指令 ke install npd
由 kubectl 编辑 configmap kube-system/node-problem-detector-config,

kubectl edit cm -n kube-system node-problem-detector-config

在 configMap 的规则下添加异常日志信息，规则遵循正则表达式。

自定义最佳实践规则

准备一个规则 yaml，例如，下面的规则将验证你的 pod 规范，以确保镜像只来自授权的注册处。

checks:
  imageFromUnauthorizedRegistry: warning

customChecks:
  imageFromUnauthorizedRegistry:
    promptMessage: When the corresponding rule does not match. Show that image from an unauthorized registry.
    category: Images
    target: Container
    schema:
      '$schema': http://json-schema.org/draft-07/schema
      type: object
      properties:
        image:
          type: string
          not:
            pattern: ^quay.io

将上述规则保存为yaml，例如，rule.yaml。
用 rule.yaml 运行 KubeEye。

root:# ke diag -f rule.yaml --kubeconfig ~/.kube/config
NAMESPACE     SEVERITY    NAME                      KIND         TIME                        MESSAGE
default       Warning     nginx                     Deployment   2020-11-27T17:18:31+08:00   [imageFromUnauthorizedRegistry]
kube-system   Warning     node-problem-detector     DaemonSet    2020-11-27T17:18:31+08:00   [livenessProbeMissing runAsPrivileged]
kube-system   Warning     calico-node               DaemonSet    2020-11-27T17:18:31+08:00   [cpuLimitsMissing runAsPrivileged]
kube-system   Warning     calico-kube-controllers   Deployment   2020-11-27T17:18:31+08:00   [cpuLimitsMissing livenessProbeMissing]
kube-system   Warning     nodelocaldns              DaemonSet    2020-11-27T17:18:31+08:00   [runAsPrivileged cpuLimitsMissing]
default       Warning     nginx                     Deployment   2020-11-27T17:18:31+08:00   [livenessProbeMissing cpuLimitsMissing]
kube-system   Warning     coredns                   Deployment   2020-11-27T17:18:31+08:00   [cpuLimitsMissing]