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CRI: change the /dev/shm mount options in Sandbox.

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All containers except the pause container, mount `/dev/shm" with flags
`nosuid,nodev,noexec`. So change mount options for pause container to
keep consistence.
This also helps to solve issues of failing to mount `/dev/shm` when
pod/container level user namespace is enabled.

Fixes: #6911

Signed-off-by: Jiang Liu <gerry@linux.alibaba.com>
Signed-off-by: Lei Wang <wllenyj@linux.alibaba.com>
This commit is contained in:
wllenyj 2022-05-10 01:11:23 +08:00
parent a62a95789c
commit 42a386c816
1 changed files with 4 additions and 1 deletions
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5
pkg/cri/server/sandbox_run_linux.go
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@ -103,12 +103,15 @@ func (c *criService) sandboxContainerSpec(id string, config *runtime.PodSandboxC
}
// Remove the default /dev/shm mount from defaultMounts, it is added in oci/mounts.go.
specOpts = append(specOpts, oci.WithoutMounts(devShm))
// In future the when user-namespace is enabled, the `nosuid, nodev, noexec` flags are
// required, otherwise the remount will fail with EPERM. Just use them unconditionally,
// they are nice to have anyways.
specOpts = append(specOpts, oci.WithMounts([]runtimespec.Mount{
{
Source: sandboxDevShm,
Destination: devShm,
Type: "bind",
Options: []string{"rbind", "ro"},
Options: []string{"rbind", "ro", "nosuid", "nodev", "noexec"},
},
// Add resolv.conf for katacontainers to setup the DNS of pod VM properly.
{