容器内存溢出排障思路

问题现象：当pod长时间处于容器创建中时，describe查看pod event 时,最后有显示 no space left on device或no allocated memory，很可能就是出现节点内存溢出的问题。
确认问题：登录节点查看，执行如下两条命令检查

无异常

#cat /sys/fs/cgroup/memory/kubepods/memory.kmem.slabinfo
cat: /sys/fs/cgroup/memory/kubepods/memory.kmem.slabinfo: Input/output error
# cat /sys/fs/cgroup/memory/kubepods/burstable/memory.kmem.usage_in_bytes
cat: /sys/fs/cgroup/memory/kubepods/burstable/memory.kmem.usage_in_bytes: No such file or directory

有异常，内存溢出

#cat /sys/fs/cgroup/memory/kubepods/memory.kmem.slabinfo
slabinfo - version: 2.1
# name                 : tunables    : slabdata   
#
# cat /sys/fs/cgroup/memory/kubepods/burstable/memory.kmem.usage_in_bytes