kubernetes 升级问题笔录

╰+攻爆jí腚メ 2022-05-11 08:46 814阅读 0赞

本笔录主要是记录kubernetes从v1.7.6升级到v1.11.2的问题以及相关的解决办法

问题一:不能访问master的`10255`  
日志

[root@test-master-113 qinzhao]# kubectl logs heapster-1967565778-v5wkr -n kube-system heapster 
    I0918 10:37:05.893124       1 heapster.go:72] /heapster --source=kubernetes.summary_api:''
    I0918 10:37:05.893235       1 heapster.go:73] Heapster version v1.4.1
    I0918 10:37:05.893944       1 configs.go:61] Using Kubernetes client with master "https://10.0.0.1:443" and version v1
    I0918 10:37:05.893993       1 configs.go:62] Using kubelet port 10255
    I0918 10:37:05.896697       1 heapster.go:196] Starting with Metric Sink
    I0918 10:37:05.911591       1 heapster.go:106] Starting heapster on port 8082
    E0918 10:38:05.026522       1 summary.go:97] error while getting metrics summary from Kubelet test-master-113(10.39.0.113:10255): Get http://10.39.0.113:10255/stats/summary/: dial tcp 10.39.0.113:10255: getsockopt: connection refused
    [root@test-master-113 qinzhao]# kubectl logs heapster-1967565778-v5wkr -n kube-system heapster 
    I0918 10:37:05.893124       1 heapster.go:72] /heapster --source=kubernetes.summary_api:''
    I0918 10:37:05.893235       1 heapster.go:73] Heapster version v1.4.1
    I0918 10:37:05.893944       1 configs.go:61] Using Kubernetes client with master "https://10.0.0.1:443" and version v1
    I0918 10:37:05.893993       1 configs.go:62] Using kubelet port 10255
    I0918 10:37:05.896697       1 heapster.go:196] Starting with Metric Sink
    I0918 10:37:05.911591       1 heapster.go:106] Starting heapster on port 8082
    E0918 10:38:05.026522       1 summary.go:97] error while getting metrics summary from Kubelet test-master-113(10.39.0.113:10255): Get http://10.39.0.113:10255/stats/summary/: dial tcp 10.39.0.113:10255: getsockopt: connection refused

原因是没有打开10255这个端口

[root@test-master-113 qingcloud-csi]# netstat -tlnp 
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
    tcp        0      0 127.0.0.1:10248         0.0.0.0:*               LISTEN      19995/kubelet       
    tcp        0      0 127.0.0.1:40264         0.0.0.0:*               LISTEN      19995/kubelet       
    tcp        0      0 127.0.0.1:10249         0.0.0.0:*               LISTEN      32286/proxy         
    tcp        0      0 10.39.0.113:10250       0.0.0.0:*               LISTEN      19995/kubelet       
    tcp        0      0 127.0.0.1:9099          0.0.0.0:*               LISTEN      21392/calico-node   
    tcp        0      0 127.0.0.1:10251         0.0.0.0:*               LISTEN      22716/scheduler     
    tcp        0      0 10.39.0.113:6443        0.0.0.0:*               LISTEN      22529/apiserver     
    tcp        0      0 10.39.0.113:2379        0.0.0.0:*               LISTEN      30095/etcd          
    tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      30095/etcd          
    tcp        0      0 127.0.0.1:10252         0.0.0.0:*               LISTEN      21364/controller-ma 
    tcp        0      0 10.39.0.113:2380        0.0.0.0:*               LISTEN      30095/etcd          
    tcp        0      0 127.0.0.1:9101          0.0.0.0:*               LISTEN      1654/node_exporter  
    tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      1/systemd           
    tcp        0      0 0.0.0.0:179             0.0.0.0:*               LISTEN      21507/bird          
    tcp        0      0 0.0.0.0:9120            0.0.0.0:*               LISTEN      795/sshd            
    tcp6       0      0 :::9898                 :::*                    LISTEN      31707/kube-discover 
    tcp6       0      0 :::9100                 :::*                    LISTEN      1725/kube-rbac-prox 
    tcp6       0      0 :::111                  :::*                    LISTEN      1/systemd           
    tcp6       0      0 :::10256                :::*                    LISTEN      32286/proxy         
    tcp6       0      0 :::8080                 :::*                    LISTEN      22529/apiserver     
    tcp6       0      0 :::30004                :::*                    LISTEN      32286/proxy         
    tcp6       0      0 :::30900                :::*                    LISTEN      32286/proxy         
    tcp6       0      0 :::30902                :::*                    LISTEN      32286/proxy         
    tcp6       0      0 :::31543                :::*                    LISTEN      32286/proxy         
    tcp6       0      0 :::30903                :::*                    LISTEN      32286/proxy         
    tcp6       0      0 :::9120                 :::*                    LISTEN      795/sshd

--------------------

问题二:装不上qingcloud-csi的存储插件  
日志

Type     Reason   Age              From                     Message
      ----     ------   ----             ----                     -------
      Normal   Pulled   1m (x4 over 2m)  kubelet, test-slave-117  Container image "csiplugin/csi-qingcloud:v0.2.0" already present on machine
      Normal   Created  1m (x4 over 2m)  kubelet, test-slave-117  Created container
      Warning  Failed   1m (x4 over 2m)  kubelet, test-slave-117  Error: failed to start container "csi-qingcloud": Error response from daemon: linux mounts: Path /var/lib/kubelet is mounted on / but it is not a shared mount.
      Normal   Pulled   1m (x2 over 2m)  kubele
    t, test-slave-117  Container image "quay.io/k8scsi/driver-registrar:v0.2.0" already present on machine
      Normal   Created  1m (x2 over 2m)  kubelet, test-slave-117  Created container
      Normal   Started  1m (x2 over 2m)  kubelet, test-slave-117  Started container
      Warning  BackOff  1m (x7 over 2m)  kubelet, test-slave-117  Back-off restarting failed container

解决办法

[root@test-slave-117 ~]# systemctl cat docker | grep -i mount
    MountFlags=slave

把docker 的参数`MountFlags=slave`改为`MountFlags=shared`就可以搞定了

[root@test-slave-117 ~]# cat /usr/lib/systemd/system/docker.service
    [Unit]
    Description=Docker Application Container Engine
    Documentation=http://docs.docker.com
    After=network.target rhel-push-plugin.socket registries.service
    Wants=docker-storage-setup.service
    Requires=docker-cleanup.timer
    
    [Service]
    Type=notify
    NotifyAccess=all
    EnvironmentFile=-/run/containers/registries.conf
    EnvironmentFile=-/etc/sysconfig/docker
    EnvironmentFile=-/etc/sysconfig/docker-storage
    EnvironmentFile=-/etc/sysconfig/docker-network
    Environment=GOTRACEBACK=crash
    Environment=DOCKER_HTTP_HOST_COMPAT=1
    Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin
    ExecStart=/usr/bin/dockerd-current \
              --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current \
              --default-runtime=docker-runc \
              --exec-opt native.cgroupdriver=systemd \
              --userland-proxy-path=/usr/libexec/docker/docker-proxy-current \
              --seccomp-profile=/etc/docker/seccomp.json \
              $OPTIONS \
              $DOCKER_NETWORK_OPTIONS \
              $DOCKER_STORAGE_OPTIONS \
              $ADD_REGISTRY \
              $BLOCK_REGISTRY \
              $INSECURE_REGISTRY \
    	  $REGISTRIES
    ExecReload=/bin/kill -s HUP $MAINPID
    LimitNOFILE=1048576
    LimitNPROC=1048576
    LimitCORE=infinity
    TimeoutStartSec=0
    Restart=on-abnormal
    MountFlags=shared ##修改这个参数
    KillMode=process
    
    [Install]
    WantedBy=multi-user.target

相关文档以及issue

[https://kubernetes.io/docs/concepts/storage/volumes/\#configuration][https_kubernetes.io_docs_concepts_storage_volumes_configuration]  
[https://bugs.centos.org/view.php?id=14455][https_bugs.centos.org_view.php_id_14455]  
[https://github.com/yunify/qingcloud-csi/blob/master/docs/static-provisioner-zh.md][https_github.com_yunify_qingcloud-csi_blob_master_docs_static-provisioner-zh.md]

--------------------

问题三：在指定空间打开网络隔离通过kube-lb服务不能访问指定空间的服务，也ping 不通服务  
关闭网路隔离

--------------------

问题四:证书不对的问题  
日志

[root@dev-master-105 ~]# journalctl -u kubelet -f 
    -- Logs begin at Fri 2018-09-14 02:49:34 CST. --
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: I0914 18:21:19.863620   17816 feature_gate.go:230] feature gates: &{map[RotateKubeletClientCertificate:true RotateKubeletServerCertificate:true]}
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: I0914 18:21:19.863678   17816 feature_gate.go:230] feature gates: &{map[RotateKubeletServerCertificate:true RotateKubeletClientCertificate:true]}
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: I0914 18:21:19.863841   17816 plugins.go:97] No cloud provider specified.
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: I0914 18:21:19.863854   17816 server.go:524] No cloud provider specified: "" from the config file: ""
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: I0914 18:21:19.863875   17816 bootstrap.go:56] Using bootstrap kubeconfig to generate TLS client cert, key and kubeconfig file
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: I0914 18:21:19.865699   17816 bootstrap.go:86] No valid private key and/or certificate found, reusing existing private key or creating a new one
    Sep 14 18:21:19 dev-master-105 kubelet[17816]: F0914 18:21:19.889677   17816 server.go:262] failed to run Kubelet: cannot create certificate signing request: Post https://10.39.0.105:6443/apis/certificates.k8s.io/v1beta1/certificatesigningrequests: x509: certificate signed by unknown authority

对比kube-apiserver指定的证书就可以搞定

--------------------

问题五：启用rbac模式下报的错误

Normal   SandboxChanged          42s (x12 over 1m)  kubelet, dev-master-105  Pod sandbox changed, it will be killed and re-created.
      Warning  FailedCreatePodSandBox  41s (x4 over 48s)  kubelet, dev-master-105  (combined from similar events): Failed create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "efb32cbd3303ed7761e84f6521566a2c6a38fce4cd289b0ff183a42002007f21" network for pod "kube-dns-58d745cd6d-gdgcp": NetworkPlugin cni failed to set up pod "kube-dns-58d745cd6d-gdgcp_kube-system" network: pods "kube-dns-58d745cd6d-gdgcp" is forbidden: User "system:serviceaccount:kube-system:default" cannot get pods in the namespace "kube-system"

解决方法:将system:serviceaccount:kube-system:default绑定cluster-admin clusterrole

[root@master-47-35 prome]# cat default.yaml 
    kind: ClusterRoleBinding
    apiVersion: rbac.authorization.k8s.io/v1beta1
    metadata:
      name: default
      namespace: kube-system
    subjects:
    - kind: ServiceAccount
      name: default
      namespace: kube-system
    roleRef:
      kind: ClusterRole
      name: cluster-admin
      apiGroup: ""

--------------------

打node 或者master 节点的标签

kubectl label node dev-master-105 node-role.kubernetes.io/master='master'
    kubectl label node dev-slave-107  node-role.kubernetes.io/node='node'

root@dev-master-105 ~]# kubectl get no
    NAME             STATUS    ROLES     AGE       VERSION
    dev-master-105   Ready     master    304d      v1.11.0-168+f47446a730ca03
    dev-slave-107    Ready     node      282d      v1.11.0-168+f47446a730ca03
    dev-slave-108    Ready     node      308d      v1.11.0-168+f47446a730ca03
    dev-slave-110    Ready     node      308d      v1.11.0-168+f47446a730ca03

--------------------

问题六：prometheus 报错

level=error ts=2018-09-16T23:33:54.76892054Z caller=main.go:211 component=k8s_client_runtime err="github.com/prometheus/prometheus/discovery/kubernetes/kubernetes.go:178: Failed to list *v1.Service: Get https://10.0.0.1:443/api/v1/services?resourceVersion=0: dial tcp 10.0.0.1:443: getsockopt: no route to host"
    level=error ts=2018-09-16T23:33:54.76892347Z caller=main.go:211 component=k8s_cli^Cent_runtime err="github.com/prometheus/prometheus/discovery/kubernetes/kubernetes.go:178: Failed to list *v1.Service: Get https://10.0.0.1:443/api/v1/services?resourceVersion=0: dial tcp 10.0.0.1:443: getsockopt: no route to host"
    level=error ts=2018-09-16T23:33:54.768960604Z caller=main.go:211 component=k8s_client_runtime err="github.com/prometheus/prometheus/discovery/kubernetes/kubernetes.go:177: Failed to list *v1.Endpoints: Get https://10.0.0.1:443/api/v1/endpoints?resourceVersion=0: dial tcp 10.0.0.1:443: getsockopt: no route to host"

这个问题是dns挂掉了  
重启dns就可以解决问题

--------------------

问题七：通过kubectl logs pod-xxx -n namespace不能查看日志的解决办法

[root@test-master-113 kube-proxy]# kubectl logs prometheus-2159841327-pgfsv -n kube-system prometheus 
    Error from server (Forbidden): Forbidden (user=kubernetes, verb=get, resource=nodes, subresource=proxy) ( pods/log prometheus-2159841327-pgfsv)

执行以下命令

kubectl create clusterrolebinding kube-apiserver:kubelet-apis --clusterrole=system:kubelet-api-admin --user kubernetes

--------------------

问题八 通过新的kubectl 命令获取pod时出现好多`Evicted pod`

[root@dev-master-105 prometheus]# kubectl get  pods -n kube-system 
    NAME                                        READY     STATUS               RESTARTS   AGE
    alertmanager-1589824335-hm74b               0/1       ContainerCannotRun   18         15h
    calico-node-1tlfp                           2/2       Running              2          90d
    calico-node-d0dz4                           2/2       Running              0          155d
    calico-node-jjcgc                           2/2       Running              2          155d
    calico-node-ntlqk                           2/2       Running              2          90d
    calico-policy-controller-4081051551-4rc73   1/1       Running              1          146d
    calico-policy-controller-4081051551-tgk92   0/1       Evicted              0          155d
    dummy-3337601728-37zvf                      0/1       Evicted              0          155d
    dummy-3337601728-h95z2                      0/1       Evicted              0          237d
    dummy-3337601728-k7zlj                      1/1       Running              1          15h
    elasticsearch-logging-v1-3910393438-k3cp8   1/1       Running              1          155d
    etcd-dev-master-105                         1/1       Running              0          10h
    filebeat-9k1ng                              1/1       Running              1          46d
    filebeat-cx4q3                              1/1       Running              1          46d
    filebeat-l4lhp                              1/1       Running              3          46d
    filebeat-xxs7f                              1/1       Running              40         46d
    fluentd-elk-jjnps                           1/1       Running              1          37d
    grafana-1688250711-jx42d                    0/1       ContainerCannotRun   21         15h
    grafana-1688250711-sk4p9                    0/1       Evicted              0          155d
    heapster-4291925761-47kt1                   0/4       Evicted              0          155d
    heapster-4291925761-r891j                   3/4       CrashLoopBackOff     21         146d
    informer                                    0/1       Error                0          254d
    kube-apiserver-dev-master-105               1/1       Running              0          10h
    kube-controller-manager-dev-master-105      1/1       Running              0          10h
    kube-dns-2744242050-8j83t                   0/3       CrashLoopBackOff     398        99d
    kube-lb-bk738                               1/1       Running              1          99d
    kube-lb-kx0wj                               1/1       Running              0          155d
    kube-lb-qws2c                               1/1       Running              1          155d
    kube-lb-vjbp7                               1/1       Running              1          155d
    kube-proxy-54p8x                            1/1       Running              1          90d
    kube-proxy-9t76j                            1/1       Running              1          90d
    kube-proxy-nb1gl                            1/1       Running              6          90d
    kube-proxy-v27hm                            1/1       Running              1          90d
    kube-scheduler-dev-master-105               1/1       Running              0          10h
    kubectl-dqjb8                               1/1       Running              1          99d
    kubectl-kbfvb                               1/1       Running              1          155d
    kubectl-ml3hb                               0/1       ContainerCreating    0          155d
    kubectl-x08fl                               1/1       Running              1          155d
    kubernetes-dashboard-1096786477-3xhb0       0/1       Evicted              0          155d
    kubernetes-dashboard-1096786477-ngb71       0/1       CrashLoopBackOff     193        145d
    prometheus-7343409-0wql3                    0/2       Evicted              0          264d
    prometheus-7343409-2l1sr                    0/2       Evicted              0          265d
    prometheus-7343409-401pp                    0/2       Evicted              0          264d
    prometheus-7343409-731gp                    0/2       Evicted              0          266d
    prometheus-7343409-bb6m9                    0/2       Evicted              0          264d
    prometheus-7343409-cbbzj                    0/2       Evicted              0          277d
    prometheus-7343409-g4j4z                    0/2       Evicted              0          266d
    prometheus-7343409-hwk57                    0/2       Evicted              0          264d
    prometheus-7343409-j4l2v                    0/2       Evicted              0          264d
    prometheus-7343409-lsw54                    2/2       Running              2          155d
    prometheus-7343409-mw3vv                    0/2       Evicted              0          264d
    prometheus-7343409-n4l7z                    0/2       Evicted              0          266d
    prometheus-7343409-sdmxd                    0/2       Evicted              0          266d
    prometheus-7343409-spc5r                    0/2       Evicted              0          266d
    qingcloud-volume-provisioner                1/1       Running              1          151d

解决办法：删除掉就行

kubectl get  pods -n kube-system |grep Evicted | awk '{print $1}' | xargs kubectl delete pod -nkube-system

--------------------

问题九 通过新的calicoctl 命令获取查看不了node status

解决办法下载对应版本的calicoctl 配置上相应的命令就搞定

--------------------

问题十  
calico-node 起不来  
kubectl describe pod pod-id的查看到以下信息

Events:
      Type     Reason            Age                From                    Message
      ----     ------            ----               ----                    -------
      Normal   Started           45s                kubelet, dev-slave-110  Started container
      Normal   Pulled            45s                kubelet, dev-slave-110  Container image "harbor.enncloud.cn/enncloud/node:v3.2.1" already present on machine
      Normal   Created           45s                kubelet, dev-slave-110  Created container
      Normal   Started           45s                kubelet, dev-slave-110  Started container
      Normal   Pulled            45s                kubelet, dev-slave-110  Container image "harbor.enncloud.cn/enncloud/cni:v3.2.1" already present on machine
      Normal   Created           45s                kubelet, dev-slave-110  Created container
      Warning  DNSConfigForming  43s (x4 over 46s)  kubelet, dev-slave-110  Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 127.0.0.1 10.38.240.8 10.36.8.40
      Warning  Unhealthy         10s (x3 over 30s)  kubelet, dev-slave-110  Readiness probe failed: calico/node is not ready: felix is not ready: Get http://localhost:9099/readiness: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

同时发现dns服务起不来

[root@dev-master-105 calico]# kubectl get pods -n kube-system  -owide 
    
    kube-dns-58d745cd6d-gdgcp                   0/3       ContainerCreating   3          14d       <none>          dev-master-105   <none>

解决办法:  
删除dns 的pod

或者删除 /etc/resolv.conf 多余的dns服务

--------------------

etcd 服务重启出现`publish error: etcdserver: request timed out, possibly due to connection lost`

具体日志如下:

Sep 30 12:26:51 master-47-34 etcd[5342]: publish error: etcdserver: request timed out, possibly due to connection lost
    Sep 30 12:26:58 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:05 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:12 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:19 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:26 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:33 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:40 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:47 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:27:54 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:28:01 master-47-34 etcd[5342]: publish error: etcdserver: request timed out
    Sep 30 12:28:08 master-47-34 etcd[5342]: publish error: etcdserver: request timed out

排查思路  
使用`journalctl -u etcd -f` 命令查看是否有权限的问题  
如

cannot open database at /opt/etcd/member/snap/db (open /opt/etcd/member/snap/db: permission denied)

如果有使用

chown etcd:etcd /opt/etcd/member/snap/db

再次启动有问题，就直接通过执行`systemctl status etcd` 获取启动命令，手动执行看看是啥错误

[root@master-47-34 wal]# systemctl status etcd
    ● etcd.service - Etcd Server
       Loaded: loaded (/etc/systemd/system/etcd.service; enabled; vendor preset: disabled)
       Active: activating (auto-restart) (Result: exit-code) since Sun 2018-09-30 12:36:06 CST; 11ms ago
      Process: 10892 ExecStart=/usr/bin/etcd --name=etcd-47-34 --cert-file=/etc/kubernetes/ssl/etcd.pem --key-file=/etc/kubernetes/ssl/etcd-key.pem --peer-cert-file=/etc/kubernetes/ssl/etcd.pem --peer-key-file=/etc/kubernetes/ssl/etcd-key.pem --trusted-ca-file=/etc/kubernetes/ssl/ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/ca.pem --initial-advertise-peer-urls=https://10.39.47.34:2380 --listen-peer-urls=https://10.39.47.34:2380 --listen-client-urls=https://10.39.47.34:2379,http://127.0.0.1:2379 --advertise-client-urls=https://10.39.47.34:2379 --initial-cluster-token=k8s-etcd-cluster --initial-cluster=etcd-47-34=https://10.39.47.34:2380,etcd-47-35=https://10.39.47.35:2380,etcd-47-36=https://10.39.47.36:2380 --eletion-timeout=3000 --initial-cluster-state=new --data-dir=/opt/etcd/ (code=exited, status=2)
     Main PID: 10892 (code=exited, status=2)
    
    Sep 30 12:36:06 master-47-34 systemd[1]: etcd.service: main process exited, code=exited, status=2/INVALIDARGUMENT
    Sep 30 12:36:06 master-47-34 systemd[1]: Failed to start Etcd Server.
    Sep 30 12:36:06 master-47-34 systemd[1]: Unit etcd.service entered failed state.
    Sep 30 12:36:06 master-47-34 systemd[1]: etcd.service failed.

执行

/usr/bin/etcd --name=etcd-47-34 --cert-file=/etc/kubernetes/ssl/etcd.pem --key-file=/etc/kubernetes/ssl/etcd-key.pem --peer-cert-file=/etc/kubernetes/ssl/etcd.pem --peer-key-file=/etc/kubernetes/ssl/etcd-key.pem --trusted-ca-file=/etc/kubernetes/ssl/ca.pem --peer-trusted-ca-file=/etc/kubernetes/ssl/ca.pem --initial-advertise-peer-urls=https://10.39.47.34:2380 --listen-peer-urls=https://10.39.47.34:2380 --listen-client-urls=https://10.39.47.34:2379,http://127.0.0.1:2379 --advertise-client-urls=https://10.39.47.34:2379 --initial-cluster-token=k8s-etcd-cluster --initial-cluster=etcd-47-34=https://10.39.47.34:2380,etcd-47-35=https://10.39.47.35:2380,etcd-47-36=https://10.39.47.36:2380  --initial-cluster-state=new --data-dir=/opt/etcd/

执行看看是啥问题，确认没有问题后经`systemctl resatrt etcd`重启etcd 服务

--------------------

CICD镜像pull不下来的原因  
现象----> 日志

[2018/09/30 17:14:24][Warning] Nameserver limits were exceeded, some nameservers have been omitted, the applied nameserver line is: 127.0.0.1 10.38.240.8 10.36.8.40 
    [2018/09/30 17:14:26][Warning] Failed to pull image "harbor.enncloud.cn/paas/clone-repo:v2.2": [rpc error: code = Unknown desc = Error: image paas/clone-repo:v2.2 not found, rpc error: code = Unknown desc = Error: image paas/clone-repo:v2.2 not found] 
    [2018/09/30 17:14:26][Warning] Error: ErrImagePull 
    [2018/09/30 17:14:26][Warning] Error: ImagePullBackOff

解决办法

[root@dev-slave-108 ~]# cd /var/lib/kubelet/
    [root@dev-slave-108 kubelet]# ls -l 
    total 196
    lrwxrwxrwx  1 root root     20 Dec  8  2017 config -> /root/.docker/config
    lrwxrwxrwx  1 root root     25 Jan  8  2018 config.json -> /root/.docker/config.json
    -rw-r--r--  1 root root     40 Sep 15 08:57 cpu_manager_state
    drwxr-xr-x  2 root root   4096 Sep 30 17:20 device-plugins
    drwx------  2 root root   4096 Sep 15 08:57 plugin-containers
    drwxr-x---  4 root root   4096 Sep 17 11:05 plugins
    drwxr-x--- 51 root root 180224 Sep 30 17:20 pods
    [root@dev-slave-108 kubelet]# rm -rf config
    [root@dev-slave-108 kubelet]# ls -l 
    total 196
    lrwxrwxrwx  1 root root     25 Jan  8  2018 config.json -> /root/.docker/config.json
    -rw-r--r--  1 root root     40 Sep 15 08:57 cpu_manager_state
    drwxr-xr-x  2 root root   4096 Sep 30 17:20 device-plugins
    drwx------  2 root root   4096 Sep 15 08:57 plugin-containers
    drwxr-x---  4 root root   4096 Sep 17 11:05 plugins
    drwxr-x--- 51 root root 180224 Sep 30 17:20 pods

--------------------

Oct 12 11:27:41 test-slave-114 kubelet[27200]: E1012 11:27:41.992855   27200 kubelet_volumes.go:140] Orphaned pod "32828c49-a053-11e8-a528-5254eec04736" found, but volume paths are still present on disk : There were a total of 3 errors similar to this. Turn up verbosity to see them.
    Oct 12 11:27:43 test-slave-114 kubelet[27200]: E1012 11:27:43.988378   27200 kubelet_volumes.go:140] Orphaned pod "32828c49-a053-11e8-a528-5254eec04736" found, but volume paths are still present on disk : There were a total of 3 errors similar to this. Turn up verbosity to see them.
    Oct 12 11:27:45 test-slave-114 kubelet[27200]: E1012 11:27:45.992073   27200 kubelet_volumes.go:140] Orphaned pod "32828c49-a053-11e8-a528-5254eec04736" found, but volume paths are still present on disk : There were a total of 3 errors similar to this. Turn up verbosity to see them.
    Oct 12 11:27:48 test-slave-114 kubelet[27200]: E1012 11:27:48.119069   27200 kubelet_volumes.go:140] Orphaned pod "32828c49-a053-11e8-a528-5254eec04736" found, but volume paths are still present on disk : There were a total of 3 errors similar to this. Turn up verbosity to see them.
    Oct 12 11:27:49 test-slave-114 kubelet[27200]: E1012 11:27:49.994550   27200 kubelet_volumes.go:140] Orphaned pod "32828c49-a053-11e8-a528-5254eec04736" found, but volume paths are still present on disk : There were a total of 3 errors similar to this. Turn up verbosity to see them.

解决办法 手动删除对应的pod主机上的信息，还不行就重启kubelet  
例如

错误

Oct 12 12:54:36 test-slave-114 kubelet[68577]: E1012 12:54:36.359113   68577 kubelet_volumes.go:140] Orphaned pod "80a01854-c1fe-11e8-8f5d-5254eec04736" found, but volume paths are still present on disk : There were a total of 1 errors similar to this. Turn up verbosity to see them.

[root@test-slave-114 pods]# ls -l 
    total 32
    drwxr-x--- 5 root root 4096 Oct  8 13:42 01bdc09f-cabd-11e8-afbb-5254eec04736
    drwxr-x--- 4 root root 4096 Sep 27 10:39 80a01854-c1fe-11e8-8f5d-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  9 10:11 89620113-cb68-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct 12 11:12 9cf8d3b8-cdcc-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  8 16:40 c07b96d6-cad5-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  9 09:30 d71de50f-cb62-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct 12 11:07 e8fe1a5f-cdcb-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  8 13:21 f800c26d-cab9-11e8-afbb-5254eec04736
    [root@test-slave-114 pods]# rm -rf 80a01854-c1fe-11e8-8f5d-5254eec04736
    [root@test-slave-114 pods]# ls -l 
    total 28
    drwxr-x--- 5 root root 4096 Oct  8 13:42 01bdc09f-cabd-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  9 10:11 89620113-cb68-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct 12 11:12 9cf8d3b8-cdcc-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  8 16:40 c07b96d6-cad5-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  9 09:30 d71de50f-cb62-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct 12 11:07 e8fe1a5f-cdcb-11e8-afbb-5254eec04736
    drwxr-x--- 5 root root 4096 Oct  8 13:21 f800c26d-cab9-11e8-afbb-5254eec04736

通过命令`journalctl -u kubelet -f`查看kubelet的日志，没有再看到相关的错误日志

--------------------

问题`kubelet: - exit status 1, rootInodeErr: cmd [find /var/lib/docker/overlay/fda10ef69b731eb6aa0dae3b0cb438a5d114ac1195ec45e6472ba26cd7f169b9 -xdev -printf .] failed. stderr: find`

Oct 23 16:46:43 proxy-20-85 kubelet: - exit status 1, rootInodeErr: cmd [find /var/lib/docker/overlay/fda10ef69b731eb6aa0dae3b0cb438a5d114ac1195ec45e6472ba26cd7f169b9 -xdev -printf .] failed. stderr: find: ‘/var/lib/docker/overlay/fda10ef69b731eb6aa0dae3b0cb438a5d114ac1195ec45e6472ba26cd7f169b9’: No such file or directory
    Oct 23 16:46:43 proxy-20-85 kubelet: ; err: exit status 1, extraDiskErr: du command failed on /var/lib/docker/containers/a073fea95af9ba1227bc2e91437fbc02f34a07dd3963042cd9d37a0f6086b365 with output stdout: , stderr: du: cannot access ‘/var/lib/docker/containers/a073fea95af9ba1227bc2e91437fbc02f34a07dd3963042cd9d37a0f6086b365’: No such file or directory
    Oct 23 16:46:43 proxy-20-85 kubelet: - exit status 1
    Oct 23 16:46:43 proxy-20-85 kubelet: - exit status 1, rootInodeErr: cmd [find /var/lib/docker/overlay/43887091ad63cbc9d83048b602d2968200e91dbe5465fe194470b3ecf1a8ee98 -xdev -printf .] failed. stderr: find: ‘/var/lib/docker/overlay/43887091ad63cbc9d83048b602d2968200e91dbe5465fe194470b3ecf1a8ee98’: No such file or directory
    Oct 23 16:46:43 proxy-20-85 kubelet: ; err: exit status 1, extraDiskErr: du command failed on /var/lib/docker/containers/b7bc9aecb053743d5af528fd16ae814157c084c5be3f023f6ffd08022fa50969 with output stdout: , stderr: du: cannot access ‘/var/lib/docker/containers/b7bc9aecb053743d5af528fd16ae814157c084c5be3f023f6ffd08022fa50969’: No such file or directory
    Oct 23 16:46:43 proxy-20-85 kubelet: - exit status 1
    Oct 23 16:59:28 proxy-20-85 kubelet: ERROR:1023 16:59:28.852195   20189 kubelet_network.go:378] Failed to ensure marking rule for KUBE-MARK-DROP: error checking rule: exit status 4: iptables: Resource temporarily unavailable.
    Oct 23 17:29:47 proxy-20-85 kubelet: ERROR:1023 17:29:47.538377   20189 kubelet_network.go:412] Failed to ensure marking rule for KUBE-MARK-MASQ: error checking rule: exit status 4: iptables: Resource temporarily unavailable.
    Oct 23 18:24:40 proxy-20-85 kubelet: ERROR:1023 18:24:40.045560   20189 kubelet_network.go:412] Failed to ensure marking rule for KUBE-MARK-MASQ: error checking rule: exit status 4: iptables: Resource temporarily unavailable.