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Merge pull request #3972 from msekletar/systemd-rootless-docs

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Add a note on systemd shortcomings in rootless containers
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OpenShift Merge Robot
2019-09-18 16:00:22 +02:00
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@ -14,6 +14,9 @@ can easily fail
* No cgroup V1 Support
* cgroup V1 does not safely support cgroup delegation.
* However, cgroup V2 provides cgroup delegation and is available on Fedora starting with version 29 and other Linux distributions.
* Some systemd's unit configuration options do not work in the rootless container
* systemd fails to apply several options and failures are silently ignored (e.g. CPUShares, MemoryLimit).
* Use of certain options will cause service startup failures (e.g. PrivateNetwork).
* Can not share container images with CRI-O or other users
* Difficult to use additional stores for sharing content
* Does not work on NFS or parallel filesystem homedirs (e.g. [GPFS](https://www.ibm.com/support/knowledgecenter/en/SSFKCN/gpfs_welcome.html))