文章目录
- 一：安装calico：
- 1.1：weget安装Colico网络通信插件：
- 1.2：修改calico.yaml网卡相关配置：
- 1.2.1：查看本机ip 网卡相关信息：
- 1.2.2：修改calico.yaml网卡interface相关信息
- 1.3：kubectl apply -f calico.yaml 生成calico pod 对象：
- 1.3.1：异常日志抛出：
- 1.3.2：场景一：执行K8S admin config配置文件替换相关操作：
- 1.3.2：场景二：执行K8S admin config配置文件替换相关操作：
- 二：安装完成calico pod：解决没用正常运行问题：
- 2.1：查看calico pod 运行状态：
- 2.2：查看init：error calico pod 异常节点信息：执行 kubectl describe pod podcode
- 2.3：可以试试重新下载coredns image 和 执行docker tag coredns相关命令：
- 2.4：再次查看coredns和calico pods启动信息：
- 2.4.1：执行命令kubectl get pod -A.查看coredns和calico pods启动信息：
- 2.5：查看异常calico-node pod 日志：
- 2.5.1：master：命令： kubectl logs -f calico-node-cwpt8 -n kube-system：
- 2.5.2：master：查看异常日志
- 2.5.3：master：telnet 异常信息ip:port 地址加端口：
- 2.5.3.1：安装telnet插件：
- 2.5.3.2：telnet 异常信息ip:port 地址加端口： telnet 192.168.56.102 10250
- 2.5.3.3：开放路由不通的机器端口：10250
- 2.5.3.4：成功： telnet 192.168.56.102 10250
- 2.6：master：再次查看异常calico-node pod 日志：还是不行
- 2.7：master：查看coredns 异常日志：显示和从机器网络有关
- 2.8：cluster：查看coredns 异常日志：显示和从机器网络有关
- 2.8.1：cluster：查看异常日志：journalctl -f -u kubelet：
- 2.8.1.1重点：cni相关配置找不到："Unable to update cni config" err="no networks found in /etc/cni/net.d"
- 2.8.2：master：查看/etc/cni/net.d配置信息：
- 2.8.3：拷贝到cluster从master：/etc/cni/net.d配置信息
- 2.9：重启kubelet查看各nodes节点状态
- 三：后续问题：
一：安装calico：
1.1：weget安装Colico网络通信插件：
执行: wget --no-check-certificate https://projectcalico.docs.tigera.io/archive/v3.25/manifests/calico.yaml
[root@vboxnode3ccccccttttttchenyang kubernetes]# wget --no-check-certificate https://projectcalico.docs.tigera.io/archive/v3.25/manifests/calico.yaml
--2023-05-03 02:23:02-- https://projectcalico.docs.tigera.io/archive/v3.25/manifests/calico.yaml
正在解析主机 projectcalico.docs.tigera.io (projectcalico.docs.tigera.io)... 13.228.199.255, 18.139.194.139, 2406:da18:880:3800::c8, ...
正在连接 projectcalico.docs.tigera.io (projectcalico.docs.tigera.io)|13.228.199.255|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：238089 (233K) [text/yaml]
正在保存至: “calico.yaml”
100%[=====================================================================================>] 238,089 392KB/s 用时 0.6s
2023-05-03 02:23:03 (392 KB/s) - 已保存 “calico.yaml” [238089/238089])
1.2：修改calico.yaml网卡相关配置：
1.2.1：查看本机ip 网卡相关信息：
[root@vboxnode3ccccccttttttchenyang ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:84:1b:f1 brd ff:ff:ff:ff:ff:ff
inet 192.168.56.103/24 brd 192.168.56.255 scope global noprefixroute dynamic enp0s3
valid_lft 409sec preferred_lft 409sec
inet6 fe80::2f24:1558:442c:89f0/64 scope link tentative noprefixroute dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::643c:80ac:6748:61cd/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:61:45:2b brd ff:ff:ff:ff:ff:ff
inet 10.0.3.15/24 brd 10.0.3.255 scope global noprefixroute dynamic enp0s8
valid_lft 85662sec preferred_lft 85662sec
inet6 fe80::62a5:e7dc:430f:3cf6/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:b3:3c:9f:26 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
inet6 fe80::42:b3ff:fe3c:9f26/64 scope link
valid_lft forever preferred_lft forever
6: vethb3a646a@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default
link/ether 7e:67:28:1f:c9:1c brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::7c67:28ff:fe1f:c91c/64 scope link
valid_lft forever preferred_lft forever
8: veth87a3698@if7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default
link/ether de:5c:0b:87:e1:9c brd ff:ff:ff:ff:ff:ff link-netnsid 1
inet6 fe80::dc5c:bff:fe87:e19c/64 scope link
valid_lft forever preferred_lft forever
1.2.2：修改calico.yaml网卡interface相关信息
# Cluster type to identify the deployment type
- name: CLUSTER_TYPE
value: "k8s,bgp"
- name: IP_AUTODETECTION_METHOD
value: "interface=enp0s3"
1.3：kubectl apply -f calico.yaml 生成calico pod 对象：
1.3.1：异常日志抛出：
[root@vboxnode3ccccccttttttchenyang ~]# kubectl apply -f calico.yaml
Error from server (Forbidden): error when retrieving current configuration of:
Resource: "policy/v1, Resource=poddisruptionbudgets", GroupVersionKind: "policy/v1, Kind=PodDisruptionBudget"
Name: "calico-kube-controllers", Namespace: "kube-system"
from server for: "calico.yaml": poddisruptionbudgets.policy "calico-kube-controllers" is forbidden: User "system:node:vboxnode3ccccccttttttchenyang" cannot get resource "poddisruptionbudgets" in API group "policy" in the namespace "kube-system"
Error from server (Forbidden): error when retrieving current configuration of:
Resource: "/v1, Resource=serviceaccounts", GroupVersionKind: "/v1, Kind=ServiceAccount"
Name: "calico-kube-controllers", Namespace: "kube-system"
from server for: "calico.yaml": serviceaccounts "calico-kube-controllers" is forbidden: User "system:node:vboxnode3ccccccttttttchenyang" cannot get resource "serviceaccounts" in API group "" in the namespace "kube-system": can only create tokens for individual service accounts
Error from server (Forbidden): error when retrieving current configuration of:
Resource: "/v1, Resource=serviceaccounts", GroupVersionKind: "/v1, Kind=ServiceAccount"
Name: "calico-node", Namespace: "kube-system"
from server for: "calico.yaml": serviceaccounts "calico-node" is forbidden: User "system:node:vboxnode3ccccccttttttchenyang" cannot get resource "serviceaccounts" in API group "" in the namespace "kube-system": can only create tokens for individual service accounts
1.3.2：场景一：执行K8S admin config配置文件替换相关操作：
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get nodes -o wide --show-labels
Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error " while trying to verify candidate authority certificate "kubernetes")
[root@vboxnode3ccccccttttttchenyang ~]# mkdir -p $HOME/.kube
[root@vboxnode3ccccccttttttchenyang ~]#
[root@vboxnode3ccccccttttttchenyang ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
cp：是否覆盖"/root/.kube/config"？ y
[root@vboxnode3ccccccttttttchenyang ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
chenyang-mine-vbox02 NotReady <none> 19h v1.21.0 192.168.56.102 <none> CentOS Linux 7 (Co re) 3.10.0-1160.88.1.el7.x86_64 docker://23.0.5
vboxnode3ccccccttttttchenyang NotReady control-plane,master 19h v1.21.0 192.168.56.103 <none> CentOS Linux 7 (Co re) 3.10.0-1160.90.1.el7.x86_64 docker://23.0.5
[root@vboxnode3ccccccttttttchenyang ~]# kubectl apply -f calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/caliconodestatuses.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipreservations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
error: error parsing calico.yaml: error converting YAML to JSON: yaml: line 153: found character that cannot start any token
1.3.2：场景二：执行K8S admin config配置文件替换相关操作：
执行相关命令：
export KUBECONFIG=/root/.kube/config
chmod g-r /root/.kube/config
kubectl apply -f calico.yaml
[root@vboxnode3ccccccttttttchenyang ~]# export KUBECONFIG=/root/.kube/config
[root@vboxnode3ccccccttttttchenyang ~]# chmod g-r /root/.kube/config
[root@vboxnode3ccccccttttttchenyang ~]# kubectl apply -f calico.yaml
from server for: "calico.yaml": clusterrolebindings.rbac.authorization.k8s.io "calico-node" is forbidden: User "system:node:vboxnod e3ccccccttttttchenyang" cannot get resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope
Error from server (Forbidden): error when retrieving current configuration of:
Resource: "apps/v1, Resource=daemonsets", GroupVersionKind: "apps/v1, Kind=DaemonSet"
Name: "calico-node", Namespace: "kube-system"
from server for: "calico.yaml": daemonsets.apps "calico-node" is forbidden: User "system:node:vboxnode3ccccccttttttchenyang" cannot get resource "daemonsets" in API group "apps" in the namespace "kube-system"
Error from server (Forbidden): error when retrieving current configuration of:
Resource: "apps/v1, Resource=deployments", GroupVersionKind: "apps/v1, Kind=Deployment"
Name: "calico-kube-controllers", Namespace: "kube-system"
from server for: "calico.yaml": deployments.apps "calico-kube-controllers" is forbidden: User "system:node:vboxnode3ccccccttttttche nyang" cannot get resource "deployments" in API group "apps" in the namespace "kube-system"
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
chenyang-mine-vbox02 NotReady <none> 31h v1.21.0 192.168.56.102 <none> CentOS Linux 7 (Co re) 3.10.0-1160.88.1.el7.x86_64 docker://23.0.5
vboxnode3ccccccttttttchenyang NotReady control-plane,master 31h v1.21.0 192.168.56.103 <none> CentOS Linux 7 (Co re) 3.10.0-1160.90.1.el7.x86_64 docker://23.0.5
[root@vboxnode3ccccccttttttchenyang ~]# export KUBECONFIG=/root/.kube/config
[root@vboxnode3ccccccttttttchenyang ~]# chmod g-r /root/.kube/config
[root@vboxnode3ccccccttttttchenyang ~]# kubectl apply -f calico.yaml
poddisruptionbudget.policy/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
serviceaccount/calico-node created
configmap/calico-config unchanged
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/caliconodestatuses.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/ipreservations.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org configured
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org configured
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers configured
clusterrole.rbac.authorization.k8s.io/calico-node configured
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers unchanged
clusterrolebinding.rbac.authorization.k8s.io/calico-node unchanged
daemonset.apps/calico-node created
deployment.apps/calico-kube-controllers created
[root@vboxnode3ccccccttttttchenyang ~]#
二：安装完成calico pod：解决没用正常运行问题：
2.1：查看calico pod 运行状态：
查看所有命名空间
kubectl get ns -o wide
查看所有pod在kube-system命名空间
kubectl get pods -n kube-system
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get ns -o wide
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get pods -n kube-system
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get ns -o wide
NAME STATUS AGE
default Active 31h
kube-node-lease Active 31h
kube-public Active 31h
kube-system Active 31h
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-68d86f8988-zvqc2 0/1 Pending 0 30m
calico-node-cwpt8 0/1 Init:CrashLoopBackOff 9 30m
calico-node-tlvtl 1/1 Running 0 30m
coredns-545d6fc579-6ddhj 0/1 Pending 0 31h
coredns-545d6fc579-nkk68 0/1 Pending 0 31h
etcd-vboxnode3ccccccttttttchenyang 1/1 Running 1 31h
kube-apiserver-vboxnode3ccccccttttttchenyang 1/1 Running 4 31h
kube-controller-manager-vboxnode3ccccccttttttchenyang 1/1 Running 3 31h
kube-proxy-55889 1/1 Running 1 31h
kube-proxy-v8vqr 1/1 Running 1 31h
kube-scheduler-vboxnode3ccccccttttttchenyang 1/1 Running 3 31h
2.2：查看init：error calico pod 异常节点信息：执行 kubectl describe pod podcode
命令：kubectl describe pod calico-node-cwpt8 -n calico-system
部分关键信息打印：
[root@vboxnode3ccccccttttttchenyang ~]# kubectl describe pod calico-node-cwpt8 -n calico-system
Error from server (NotFound): namespaces "calico-system" not found
[root@vboxnode3ccccccttttttchenyang ~]# kubectl describe pod calico-node-cwpt8 -n kube-system
Name: calico-node-cwpt8
Namespace: kube-system
Priority: 2000001000
Priority Class Name: system-node-critical
Node: chenyang-mine-vbox02/192.168.56.102
Start Time: Tue, 01 Aug 2023 09:40:05 +0800
Labels: controller-revision-hash=6d7775958b
k8s-app=calico-node
pod-template-generation=1
Annotations: <none>
Status: Pending
IP: 192.168.56.102
IPs:
IP: 192.168.56.102
Controlled By: DaemonSet/calico-node
Init Containers:
upgrade-ipam:
Container ID: docker://34bad12ea48e1779918ecd3880ee98e907ba6e6187a615170bb7ab5f68ce2ecf
Image: docker.io/calico/cni:v3.25.0
Image ID: docker-pullable://calico/cni@sha256:a38d53cb8688944eafede2f0eadc478b1b403cefeff7953da57fe9cd2d65e977
Port: <none>
Host Port: <none>
Command:
/opt/cni/bin/calico-ipam
-upgrade
State: Terminated
Reason: Completed
Exit Code: 0
Started: Tue, 01 Aug 2023 09:40:05 +0800
Finished: Tue, 01 Aug 2023 09:40:05 +0800
Ready: True
Restart Count: 0
Environment Variables from:
kubernetes-services-endpoint ConfigMap Optional: true
Environment:
KUBERNETES_NODE_NAME: (v1:spec.nodeName)
CALICO_NETWORKING_BACKEND: <set to the key 'calico_backend' of config map 'calico-config'> Optional: false
Mounts:
/host/opt/cni/bin from cni-bin-dir (rw)
/var/lib/cni/networks from host-local-net-dir (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-chrbj (ro)
install-cni:
Container ID: docker://40ad6c438fa3bee53fc947549d5dc57b04d700250102d92d0468b8f8bbc13d95
Image: docker.io/calico/cni:v3.25.0
Image ID: docker-pullable://calico/cni@sha256:a38d53cb8688944eafede2f0eadc478b1b403cefeff7953da57fe9cd2d65e977
Port: <none>
Host Port: <none>
Command:
/opt/cni/bin/install
State: Waiting
Reason: CrashLoopBackOff
Last State: Terminated
Reason: Error
Exit Code: 1
Started: Tue, 01 Aug 2023 11:18:31 +0800
Finished: Tue, 01 Aug 2023 11:19:02 +0800
Ready: False
Restart Count: 22
Environment Variables from:
kubernetes-services-endpoint ConfigMap Optional: true
Environment:
CNI_CONF_NAME: 10-calico.conflist
CNI_NETWORK_CONFIG: <set to the key 'cni_network_config' of config map 'calico-config'> Optional: false
KUBERNETES_NODE_NAME: (v1:spec.nodeName)
CNI_MTU: <set to the key 'veth_mtu' of config map 'calico-config'> Optional: false
SLEEP: false
2.3：可以试试重新下载coredns image 和 执行docker tag coredns相关命令：
2.4：再次查看coredns和calico pods启动信息：
2.4.1：执行命令kubectl get pod -A.查看coredns和calico pods启动信息：
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-68d86f8988-zvqc2 1/1 Running 1 24h
kube-system calico-node-cwpt8 0/1 Init:CrashLoopBackOff 9 24h
kube-system calico-node-tlvtl 1/1 Running 1 24h
kube-system coredns-545d6fc579-nggnz 0/1 Pending 0 22h
kube-system coredns-545d6fc579-rbd8c 0/1 Pending 0 22h
kube-system etcd-vboxnode3ccccccttttttchenyang 1/1 Running 2 2d7h
kube-system kube-apiserver-vboxnode3ccccccttttttchenyang 1/1 Running 5 2d7h
kube-system kube-controller-manager-vboxnode3ccccccttttttchenyang 1/1 Running 6 2d7h
kube-system kube-proxy-55889 1/1 Running 2 2d7h
kube-system kube-proxy-v8vqr 1/1 Running 2 2d7h
kube-system kube-scheduler-vboxnode3ccccccttttttchenyang 1/1 Running 6 2d7h
2.5：查看异常calico-node pod 日志：
2.5.1：master：命令： kubectl logs -f calico-node-cwpt8 -n kube-system：
[root@vboxnode3ccccccttttttchenyang ~]# kubectl logs -f calico-node-cwpt8 -n kube-system
2.5.2：master：查看异常日志
[root@vboxnode3ccccccttttttchenyang ~]# kubectl logs -f calico-node-cwpt8 -n kube-system
Error from server: Get "https://192.168.56.102:10250/containerLogs/kube-system/calico-node-cwpt8/calico-node?follow=true": dial tcp 192.168.56.102:10250: connect: no route to host
2.5.3：master：telnet 异常信息ip:port 地址加端口：
2.5.3.1：安装telnet插件：
[root@vboxnode3ccccccttttttchenyang ~]# telnet 192.168.56.102:10250
-bash: telnet: 未找到命令
[root@vboxnode3ccccccttttttchenyang ~]# rpm -q telnet
未安装软件包 telnet
[root@vboxnode3ccccccttttttchenyang ~]# rpm -q telnet-server
未安装软件包 telnet-server
[root@vboxnode3ccccccttttttchenyang ~]# yum list telnet*
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: ftp.sjtu.edu.cn
* extras: ftp.sjtu.edu.cn
* updates: mirrors.bfsu.edu.cn
可安装的软件包
telnet.x86_64 1:0.17-66.el7 updates
telnet-server.x86_64 1:0.17-66.el7 updates
[root@vboxnode3ccccccttttttchenyang ~]# yum install telnet-server
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: ftp.sjtu.edu.cn
* extras: ftp.sjtu.edu.cn
* updates: mirrors.bfsu.edu.cn
base | 3.6 kB 00:00:00
docker-ce-stable | 3.5 kB 00:00:00
extras | 2.9 kB 00:00:00
kubernetes | 1.4 kB 00:00:00
updates | 2.9 kB 00:00:00
docker-ce-stable/7/x86_64/primary_db | 116 kB 00:00:01
正在解决依赖关系
--> 正在检查事务
---> 软件包 telnet-server.x86_64.1.0.17-66.el7 将被 安装
--> 解决依赖关系完成
依赖关系解决
===========================================================================================================================
Package 架构 版本 源 大小
===========================================================================================================================
正在安装:
telnet-server x86_64 1:0.17-66.el7 updates 41 k
事务概要
===========================================================================================================================
安装 1 软件包
总下载量：41 k
安装大小：55 k
Is this ok [y/d/N]: y
Downloading packages:
telnet-server-0.17-66.el7.x86_64.rpm | 41 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装 : 1:telnet-server-0.17-66.el7.x86_64 1/1
验证中 : 1:telnet-server-0.17-66.el7.x86_64 1/1
已安装:
telnet-server.x86_64 1:0.17-66.el7
完毕！
2.5.3.2：telnet 异常信息ip:port 地址加端口： telnet 192.168.56.102 10250
[root@vboxnode3ccccccttttttchenyang ~]# telnet 192.168.56.102:10250
telnet: 192.168.56.102:10250: Name or service not known
192.168.56.102:10250: Unknown host
[root@vboxnode3ccccccttttttchenyang ~]# telnet 192.168.56.102 10250
Trying 192.168.56.102...
telnet: connect to address 192.168.56.102: No route to host
[root@vboxnode3ccccccttttttchenyang ~]#
2.5.3.3：开放路由不通的机器端口：10250
systemctl status firewalld
否则->systemctl start firewalld.service
firewall-cmd --permanent --zone=public --add-port=10250/tcp
firewall-cmd --reload
firewall-cmd --permanent --zone=public --list-port
[root@chenyang-mine-vbox02 ~]# firewall-cmd --permanent --zone=public --list-port
3306/tcp 8848/tcp 6443/tcp 8080/tcp 8083/tcp 8086/tcp 9200/tcp 9300/tcp 10250/tcp
[root@chenyang-mine-vbox02 ~]#
2.5.3.4：成功： telnet 192.168.56.102 10250
[root@vboxnode3ccccccttttttchenyang ~]# telnet 192.168.56.102 10250
Trying 192.168.56.102…
Connected to 192.168.56.102.
Escape character is ‘^]’.
2.6：master：再次查看异常calico-node pod 日志：还是不行
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-68d86f8988-gxqbk 1/1 Running 0 46m
kube-system calico-node-rdwd7 0/1 Init:CrashLoopBackOff 12 46m
kube-system calico-node-xnhjc 1/1 Running 0 46m
kube-system coredns-545d6fc579-dmjsp 0/1 Running 0 48m
kube-system coredns-545d6fc579-pklfv 0/1 Running 0 48m
kube-system etcd-vboxnode3ccccccttttttchenyang 1/1 Running 0 48m
kube-system kube-apiserver-vboxnode3ccccccttttttchenyang 1/1 Running 0 48m
kube-system kube-controller-manager-vboxnode3ccccccttttttchenyang 1/1 Running 0 48m
kube-system kube-proxy-w5gls 1/1 Running 0 48m
kube-system kube-proxy-xt4gw 1/1 Running 0 47m
kube-system kube-scheduler-vboxnode3ccccccttttttchenyang 1/1 Running 0 48m
[root@vboxnode3ccccccttttttchenyang ~]# kubectl logs calico-node-rdwd7 -f --tail=50 -n kube-system
Error from server (BadRequest): container "calico-node" in pod "calico-node-rdwd7" is waiting to start: PodInitializing
[root@vboxnode3ccccccttttttchenyang ~]#
2.7：master：查看coredns 异常日志：显示和从机器网络有关
重点：意思是从节点网络无法被当前master节点查找到网络资源
User “system:serviceaccount:kube-system:coredns” cannot list resource “endpointslices” in API group “discovery.k8s.io” at the cluster scope
[root@vboxnode3ccccccttttttchenyang ~]# kubectl logs coredns-545d6fc579-dmjsp -f --tail=50 -n kube-system
E0805 18:36:01.342345 1 reflector.go:138] pkg/mod/k8s.io/client-go@v0.22.2/tools/cache/reflector.go:167: Failed to watch *v1.EndpointSlice: failed to list *v1.EndpointSlice: endpointslices.discovery.k8s.io is forbidden: User "system:serviceaccount:kube-system:coredns" cannot list resource "endpointslices" in API group "discovery.k8s.io" at the cluster scope
[INFO] plugin/ready: Still waiting on: "kubernetes"
E0805 18:36:02.676563 1 reflector.go:138] pkg/mod/k8s.io/client-go@v0.22.2/tools/cache/reflector.go:167: Failed to watch *v1.EndpointSlice: failed to list *v1.EndpointSlice: endpointslices.discovery.k8s.io is forbidden: User "system:serviceaccount:kube-system:coredns" cannot list resource "endpointslices" in API group "discovery.k8s.io" at the cluster scope
E0805 18:36:04.964823 1 reflector.go:138] pkg/mod/k8s.io/client-go@v0.22.2/tools/cache/reflector.go:167: Failed to watch *v1.EndpointSlice: failed to list *v1.EndpointSlice: endpointslices.discovery.k8s.io is forbidden: User "system:serviceaccount:kube-system:coredns" cannot list resource "endpointslices" in API group "discovery.k8s.io" at the cluster scope
[WARNING] plugin/kubernetes: starting server with unsynced Kubernetes API
2.8：cluster：查看coredns 异常日志：显示和从机器网络有关
2.8.1：cluster：查看异常日志：journalctl -f -u kubelet：
2.8.1.1重点：cni相关配置找不到：“Unable to update cni config” err=“no networks found in /etc/cni/net.d”
[root@chenyang-mine-vbox02 ~]# cd /etc/cni/net.d/
[root@chenyang-mine-vbox02 net.d]# ls
[root@chenyang-mine-vbox02 net.d]#
[root@chenyang-mine-vbox02 ~]# journalctl -f -u kubelet
-- Logs begin at 日 2023-08-06 02:16:53 CST. --
8月 06 02:43:22 chenyang-mine-vbox02 kubelet[6109]: I0806 02:43:22.030642 6109 cni.go:239] "Unable to update cni config" err="no networks found in /etc/cni/net.d"
8月 06 02:43:23 chenyang-mine-vbox02 kubelet[6109]: E0806 02:43:23.138847 6109 pod_workers.go:190] "Error syncing pod, skipping" err="failed to \"StartContainer\" for \"install-cni\" with CrashLoopBackOff: \"back-off 2m40s restarting failed container=install-cni pod=calico-node-rdwd7_kube-system(940cdb9e-c99b-46d3-a1f5-92ee1f175299)\"" pod="kube-system/calico-node-rdwd7" podUID=940cdb9e-c99b-46d3-a1f5-92ee1f175299
8月 06 02:43:23 chenyang-mine-vbox02 kubelet[6109]: E0806 02:43:23.215196 6109 kubelet.go:2218] "Container runtime network not ready" networkReady="NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized"
8月 06 02:43:27 chenyang-mine-vbox02 kubelet[6109]: I0806 02:43:27.032036 6109 cni.go:239] "Unable to update cni config" err="no networks found in /etc/cni/net.d"
2.8.2：master：查看/etc/cni/net.d配置信息：
[root@vboxnode3ccccccttttttchenyang ~]# cd /etc/cni/net.d/
[root@vboxnode3ccccccttttttchenyang net.d]# ls
10-calico.conflist calico-kubeconfig
[root@vboxnode3ccccccttttttchenyang net.d]#
2.8.3：拷贝到cluster从master：/etc/cni/net.d配置信息
[root@chenyang-mine-vbox02 net.d]# touch calico-kubeconfig
[root@chenyang-mine-vbox02 net.d]# touch 10-calico.conflist
[root@chenyang-mine-vbox02 net.d]# vi 10-calico.conflist
[root@chenyang-mine-vbox02 net.d]# vi calico-kubeconfig
[root@chenyang-mine-vbox02 net.d]# ls
10-calico.conflist calico-kubeconfig
[root@chenyang-mine-vbox02 net.d]#
2.9：重启kubelet查看各nodes节点状态
systemctl restart kubelet
kubectl get nodes -o wide
[root@chenyang-mine-vbox02 .kube]# systemctl restart kubelet
[root@chenyang-mine-vbox02 .kube]# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
chenyang-mine-vbox02 Ready <none> 97m v1.21.0 192.168.56.102 <none> CentOS Linux 7 (Core) 3.10.0-1160.88.1.el7.x86_64 docker://23.0.5
vboxnode3ccccccttttttchenyang Ready control-plane,master 98m v1.21.0 192.168.56.103 <none> CentOS Linux 7 (Core) 3.10.0-1160.90.1.el7.x86_64 docker://23.0.5
三：后续问题：
虽然节点状态从NotReady变为Ready，但coredns和calico还是没有Ready，后续会继续跟进。
[root@vboxnode3ccccccttttttchenyang ~]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-68d86f8988-gxqbk 1/1 Running 1 111m
kube-system calico-node-rdwd7 0/1 Init:CrashLoopBackOff 12 111m
kube-system calico-node-xnhjc 1/1 Running 1 111m
kube-system coredns-545d6fc579-pklfv 0/1 Running 1 113m
kube-system coredns-545d6fc579-xvkxm 0/1 ContainerCreating 0 13m
kube-system etcd-vboxnode3ccccccttttttchenyang 1/1 Running 2 114m
kube-system kube-apiserver-vboxnode3ccccccttttttchenyang 1/1 Running 1 114m
kube-system kube-controller-manager-vboxnode3ccccccttttttchenyang 1/1 Running 1 114m
kube-system kube-proxy-w5gls 1/1 Running 1 113m
kube-system kube-proxy-xt4gw 1/1 Running 1 113m
kube-system kube-scheduler-vboxnode3ccccccttttttchenyang 1/1 Running 2 114m
[root@vboxnode3ccccccttttttchenyang ~]#
