问题一

描述

正在运行的Openshift Allinone 3.11集群创建POD突然报出

    network: failed to allocate for range 0: no IP addresses available in range set

现象

整个Allinone集群所有的POD不超多100个，但是/var/lib/cni/networks/openshift-sdn/的IP地址文件却有252个。造成当前节点的容器网络无法再为POD分配IP地址

解决方案

1. 将对应节点标记为不可调用

    oc adm manage-node node1.test.openshift.com --schedulable=false
   

2. 驱散对应节点上的POD

    oc adm drain node1.test.openshift.com --ignore-daemonsets
   

3. 停止docker和origin-node服务

    systemctl stop docker origin-node.service
   

4. 删除/var/lib/cni/networks/openshift-sdn/路径下所有文件

    rm -rf /var/lib/cni/networks/openshift-sdn/*
   

5. 重启docker和origin-node服务

    systemctl start docker origin-node.service
   

6. 将节点标记为可调度

    oc adm manage-node node1.test.openshift.com --schedulable=true
   

相关链接

https://access.redhat.com/solutions/3328541 https://github.com/debianmaster/openshift-examples/issues/59 https://github.com/cloudnativelabs/kube-router/issues/383 https://github.com/jsenon/api-cni-cleanup/blob/master/k8s/deployment.yml#L42