calico报错「终于解决」

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问题：
Readiness probe failed: calico/node is not ready: felix is not ready: Get http://localhost:9099/readiness: dial tcp: lookup localhost on [::1]:53: read udp [::1]:58289->[::1]:53: read: connection refused

解决方法：

#错误原因
vi /etc/hosts 文件中缺少以下配置

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

#不知道谁给删的，真的是无奈了

问题：
unable to ensure pod container exists: failed to create container for [kubepods burstable pod174ffa0f-3c24-4481-9254-efce02b03001] :
 mkdir /sys/fs/cgroup/memory/kubepods/burstable/pod174ffa0f-3c24-4481-9254-efce02b03001: cannot allocate memory

解决方法：
Cgroup泄漏，mark一下，此处使用网上的多数解决方案并米诶有解决，做一个小小的记录，在此需要对no space left的服务器进行 reboot重启，即可解决问题，出现问题的可能为段时间内删除大量的pod所致。

初步思路，可以在今后的集群管理汇总，对服务器进行维修，通过删除节点，并对节点进行reboot处理

问题：
#启动calico后发现控制器成功就绪
node为0/1  但是running   查看日志 后发现以下情况 

报错信息
calico/node is not ready: BIRD is not ready: BGP not established with 10.133

原因：
#搜索一下得知没有匹配到正确的网卡，发现当前节点中存在多个相似的网卡
bond1
bond1.2

解决方法：
在calico.yaml中修改匹配的节点为
bond1$  重启即可

#如果有节点在不同集群，网卡可能也不相同
#如，一个是eth1 一个是eth0
#可以配置为 (eth1|eth0)

问题：
calico 状态异常（0/1）修复
  Warning  Unhealthy  33s        kubelet, 10.252.205.100  Readiness probe failed: 2021-06-28 07:48:22.019 [INFO][222] confd/health.go 180: Number of node(s) with BGP peering established = 22
calico/node is not ready: BIRD is not ready: BGP not established with 
  Warning  Unhealthy  23s  kubelet, 10.252.205.100  Readiness probe failed: 2021-06-28 07:48:32.013 [INFO][275] confd/health.go 180: Number of node(s) with BGP peering established = 36
calico/node is not ready: BIRD is not ready: BGP not established with 10.252.205.197
  Warning  Unhealthy  13s  kubelet, 10.252.205.100  Readiness probe failed: 2021-06-28 07:48:42.014 [INFO][332] confd/health.go 180: Number of node(s) with BGP peering established = 36
calico/node is not ready: BIRD is not ready: BGP not established with 10.252.205.197
  Warning  Unhealthy  3s  kubelet, 10.252.205.100  Readiness probe failed: 2021-06-28 07:48:52.009 [INFO][380] confd/health.go 180: Number of node(s) with BGP peering established = 36
calico/node is not ready: felix is not ready: readiness probe reporting 404
  Warning  Unhealthy  2s (x3 over 22s)  kubelet, 10.252.205.100  Liveness probe failed: calico/node is not ready: Felix is not live: liveness probe reporting 404



#修复方法
[ecip@cmpaas-core-new-mpp-b-11 ~]$ cd /opt/cni/bin/
[ecip@cmpaas-core-new-mpp-b-11 bin]$ ls
bandwidth  calico  calico-ipam  flannel  host-local  loopback  portmap  tuning

#备份以下配置
mv * linshi


#备份挂载文件
[ecip@cmpaas-core-new-mpp-b-11 bin]$ cd /var/run/calico/
[ecip@cmpaas-core-new-mpp-b-11 calico]$ ls
bird6.ctl  bird.ctl  cgroup

#mv * linshi

#重启该节点kubelet

到master上delete pod 该calico解决