K8S Feature

MountPropagation

• 挂载传播
• None - private - 默认
• HostToContainer - rslave
  • 主机挂在更新容器挂在
• Bidirectional - rshared
  • 容器挂在传回主机
  • 特权容器
• Alpha v1.9, Beta v1.10

deployment:
  containers:
    - image: alpine
      name: alpine
      volumeMounts:
        - mount: /data
          mountPropagation: None

• 一般需要配置 root mount shared
• /proc/<pid>/mounts
• /proc/<pid>/mountstats
• mount_namespaces.7
• sharedsubtree

# Host 对等操作
# --mark-slave
# --mark-private
# --make-unbindable
# --make-rshared
mount --make-shared /

# Docker 对等操作
docker run -d -it -v /tmp/mnt:/tmp/mnt:rshared ubuntu