2021-04-26周一，拉取镜像升级

作者: 文茶君 | 来源:发表于2021-04-26 22:50 被阅读0次

先看了下博客
更新k8s镜像版本的三种方式https://www.jianshu.com/p/a4cedd569899

kubectl get pods --namespace=kubesphere-logging-system
获取特定namespace的pod
kubectl get pods --namespace=kubesphere-logging-system -owide

kubectl get deploy --all-namespaces
查看所有namespaces

修改service的yaml文件
kubectl edit svc xxxxx

查看pod日志
kubectl logs pods/ks-installer-777b895fdb-xlbq6 --namespace="kubesphere-system"

查看yaml
kubectl describe pods/ks-installer-777b895fdb-xlbq6 --namespace="kubesphere-system"

目标：升级fluentbit

 kubectl get deploy --namespace=kubesphere-logging-system -owide
NAME                         READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS                            IMAGES                                                                   SELECTOR
fluentbit-operator           1/1     1            1           5d    fluentbit-operator                    kubespheredev/fluentbit-operator:v0.4.0                                  app.kubernetes.io/component=operator,app.kubernetes.io/name=fluentbit-operator
logsidecar-injector-deploy   2/2     2            2           5d    logsidecar-injector,config-reloader   kubesphere/log-sidecar-injector:1.1,jimmidyson/configmap-reload:v0.3.0   app.kubernetes.io/instance=logsidecar-injector,app.kubernetes.io/managed-by=Helm,app.kubernetes.io/name=logsidecar-injector,app.kubernetes.io/version=0.1.0,helm.sh/chart=logsidecar-injector-0.1.0,logging.kubesphere.io/logsidecar-injector=logsidecar-injector-deploy

查看了部署是fluentbit-operator

kubectl describe pods/fluentbit-operator-6dd9598886-fkt4h --namespace="kubesphere-logging-system"

Name:         fluent-bit-4tjlx
Namespace:    kubesphere-logging-system
Priority:     0
Node:         i-f1or71kf/192.168.1.2
Start Time:   Wed, 21 Apr 2021 10:25:12 +0800
Labels:       app.kubernetes.io/name=fluent-bit
              controller-revision-hash=6c754d6b6c
              pod-template-generation=1
Annotations:  cni.projectcalico.org/podIP: 10.233.76.135/32
              cni.projectcalico.org/podIPs: 10.233.76.135/32
Status:       Running
IP:           10.233.76.135
IPs:
  IP:           10.233.76.135
Controlled By:  DaemonSet/fluent-bit
Containers:
  fluent-bit:
    Container ID:   docker://867b38424774f899e0120b547540cabb86ce9ff8c3cf165632e11a9af84cae12
    Image:          kubespheredev/fluent-bit:v1.6.9
    Image ID:       docker-pullable://kubespheredev/fluent-bit@sha256:46ae9a17fe2d308c685c1f0278039ad45db1f254e5cb3302176f72bbf2606255
    Port:           2020/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Sun, 25 Apr 2021 11:11:28 +0800
    Last State:     Terminated
      Reason:       Error
      Exit Code:    1
      Started:      Sat, 24 Apr 2021 10:25:16 +0800
      Finished:     Sat, 24 Apr 2021 23:16:46 +0800
    Ready:          True
    Restart Count:  2
    Environment:    <none>
    Mounts:
      /fluent-bit/config from config (ro)
      /fluent-bit/tail from positions (rw)
      /var/lib/docker/containers from varlibcontainers (ro)
      /var/log/ from varlogs (ro)
      /var/log/journal from systemd (ro)
      /var/run/secrets/kubernetes.io/serviceaccount from fluent-bit-token-wklp7 (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             True 
  ContainersReady   True 
  PodScheduled      True 
Volumes:
  varlibcontainers:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/docker/containers
    HostPathType:  
  config:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  fluent-bit-config
    Optional:    false
  varlogs:
    Type:          HostPath (bare host directory volume)
    Path:          /var/log
    HostPathType:  
  systemd:
    Type:          HostPath (bare host directory volume)
    Path:          /var/log/journal
    HostPathType:  
  positions:
    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:     
    SizeLimit:  <unset>
  fluent-bit-token-wklp7:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  fluent-bit-token-wklp7
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     
                 node.kubernetes.io/disk-pressure:NoSchedule
                 node.kubernetes.io/memory-pressure:NoSchedule
                 node.kubernetes.io/not-ready:NoExecute
                 node.kubernetes.io/pid-pressure:NoSchedule
                 node.kubernetes.io/unreachable:NoExecute
                 node.kubernetes.io/unschedulable:NoSchedule
Events:          <none>

将v1.6.9升级到v1.7.3

在不中断服务的情况下更新应用

在某些时候，你最终需要更新已部署的应用，通常都是通过指定新的镜像或镜像标签，如上面的金丝雀发布的场景中所示。kubectl 支持几种更新操作，每种更新操作都适用于不同的场景。

我们将指导你通过 Deployment 如何创建和更新应用。

假设你正运行的是 1.14.2 版本的 nginx：

kubectl create deployment my-nginx --image=nginx:1.14.2

deployment.apps/my-nginx created

要更新到 1.16.1 版本，只需使用我们前面学到的 kubectl 命令将 .spec.template.spec.containers[0].image 从 nginx:1.14.2 修改为 nginx:1.16.1。

kubectl edit deployment/my-nginx

没错，就是这样！Deployment 将在后台逐步更新已经部署的 nginx 应用。它确保在更新过程中，只有一定数量的旧副本被开闭，并且只有一定基于所需 Pod 数量的新副本被创建。想要了解更多细节，请参考 Deployment。

但是kubspere中是通过fluent-operator安装fluent的
使用kubectl get deployment --all-namespaces -owide只显示fluent-operator

执行kubectl edit deployment/fluentbit-operator --namespace kubesphere-logging-system
并无相关配置
查看部署
kubectl get deployment --namespace kubesphere-logging-system

NAME                         READY   UP-TO-DATE   AVAILABLE   AGE
fluentbit-operator           1/1     1            1           5d4h
logsidecar-injector-deploy   2/2     2            2           5d4h

kubectl get deploy -A | grep fluentbit

kubesphere-logging-system      fluentbit-operator                1/1     1            1           5d4h

查看守护进程

kubectl get ds -A | grep fluent
kubesphere-logging-system      fluent-bit      1         1         1       1            1           <none>                        5d4h

修改

kubectl edit ds fluent-bit -n kubesphere-logging-system

kind: FluentBit
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
  creationTimestamp: "2021-04-21T02:14:40Z"
  finalizers:
  - fluentbit.logging.kubesphere.io
  generation: 2
  labels:
    app.kubernetes.io/name: fluent-bit
  name: fluent-bit
  namespace: kubesphere-logging-system
  resourceVersion: "27599"
  selfLink: /apis/logging.kubesphere.io/v1alpha2/namespaces/kubesphere-logging-system/fluentbits/fluent-bit
  uid: adbe3966-523a-4d73-b4b1-06b33a07bf12
spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: node-role.kubernetes.io/edge
            operator: DoesNotExist
  fluentBitConfigName: fluent-bit-config
  image: kubespheredev/fluent-bit:v1.6.9
  positionDB:
    emptyDir: {}
  resources: {}
  tolerations:
  - operator: Exists

把1.6.9改成1.7.3

修改完毕，看成果

 kubectl describe ds fluent-bit -n kubesphere-logging-system
Name:           fluent-bit
Selector:       app.kubernetes.io/name=fluent-bit
Node-Selector:  <none>
Labels:         app.kubernetes.io/name=fluent-bit
Annotations:    deprecated.daemonset.template.generation: 3
Desired Number of Nodes Scheduled: 1
Current Number of Nodes Scheduled: 1
Number of Nodes Scheduled with Up-to-date Pods: 1
Number of Nodes Scheduled with Available Pods: 1
Number of Nodes Misscheduled: 0
Pods Status:  1 Running / 0 Waiting / 0 Succeeded / 0 Failed
Pod Template:
  Labels:           app.kubernetes.io/name=fluent-bit
  Service Account:  fluent-bit
  Containers:
   fluent-bit:
    Image:        kubespheredev/fluent-bit:v1.6.9
    Port:         2020/TCP
    Host Port:    0/TCP
    Environment:  <none>
    Mounts:
      /fluent-bit/config from config (ro)
      /fluent-bit/tail from positions (rw)
      /var/lib/docker/containers from varlibcontainers (ro)
      /var/log/ from varlogs (ro)
      /var/log/journal from systemd (ro)
  Volumes:
   varlibcontainers:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/docker/containers
    HostPathType:  
   config:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  fluent-bit-config
    Optional:    false
   varlogs:
    Type:          HostPath (bare host directory volume)
    Path:          /var/log
    HostPathType:  
   systemd:
    Type:          HostPath (bare host directory volume)
    Path:          /var/log/journal
    HostPathType:  
   positions:
    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
    Medium:     
    SizeLimit:  <unset>
Events:
  Type    Reason            Age   From                  Message
  ----    ------            ----  ----                  -------
  Normal  SuccessfulDelete  10s   daemonset-controller  Deleted pod: fluent-bit-4tjlx
  Normal  SuccessfulCreate  5s    daemonset-controller  Created pod: fluent-bit-86tdm
root@i-f1or71kf:~# kubectl get pod -
Error from server (NotFound): pods "-" not found
root@i-f1or71kf:~# kubectl get pod -A | grep fluent
kubesphere-logging-system      fluent-bit-86tdm                                                  1/1     Running     0          32s
kubesphere-logging-system      fluentbit-operator-6dd9598886-fkt4h

这是没成功，这是因为fluent-operator一直监控着fluent，代码如下：

// Deploy Fluent Bit DaemonSet
    logPath := r.getContainerLogPath(fb)
    ds := operator.MakeDaemonSet(fb, logPath)
    if err := ctrl.SetControllerReference(&fb, &ds, r.Scheme); err != nil {
        return ctrl.Result{}, err
    }

    if _, err := controllerutil.CreateOrUpdate(ctx, r.Client, &ds, r.mutate(&ds, fb)); err != nil {
        return ctrl.Result{}, err
    }

    return ctrl.Result{}, nil

通过CRD来修改

kubectl edit fluentbits.logging.kubesphere.io -n kubesphere-logging-system fluent-bit

即可修改完成
查看修改结果

kubectl describe pods/fluent-bit-tql26 --namespace=kubesphere-logging-system

结果显示已修改

另外也可以通过这种方式升级
如何拉取k8s镜像 https://www.jianshu.com/p/eca4154fe60b

2021-04-26周一，拉取镜像升级

在不中断服务的情况下更新应用

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