In case something other than a block device is supplied, podman proceeds
to apply settings for a block device with the same minor:major.
For example, "--blkio-weight-device /dev/zero:123" (alas, this is taken
literally from podman-update(1) EXAMPLES section) sets blkio weight
for /dev/ram5. Instead, it should error out since /dev/zero is not a
block device.
Add an appropriate check.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Refactor these functions to
- avoid repetition of common code (mostly stat of block device path);
- perform early return if nothing is to be done;
- remove some excessive nesting.
It also improves some error messages.
This is a preparation for the next commit.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
podman update allows users to change the cgroup configuration of an existing container using the already defined resource limits flags
from podman create/run. The supported flags in crun are:
this command is also now supported in the libpod api via the /libpod/containers/<CID>/update endpoint where
the resource limits are passed inthe request body and follow the OCI resource spec format
–memory
–cpus
–cpuset-cpus
–cpuset-mems
–memory-swap
–memory-reservation
–cpu-shares
–cpu-quota
–cpu-period
–blkio-weight
–cpu-rt-period
–cpu-rt-runtime
-device-read-bps
-device-write-bps
-device-read-iops
-device-write-iops
-memory-swappiness
-blkio-weight-device
resolves#15067
Signed-off-by: Charlie Doern <cdoern@redhat.com>
Kir Kolyshkin
Oleksandr Redko
Charlie Doern