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Add instruction for using fuse-overlayfs as the rootless storage driver

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Signed-off-by: xcffl <xcffl@outlook.com>
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xcffl
2019-08-16 22:40:23 +08:00
parent 30cbb00915
commit 284cbab193
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docs/tutorials/rootless_tutorial.md
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@ -22,6 +22,8 @@ The [slirp4netns](https://github.com/rootless-containers/slirp4netns) package pr
When using Podman in a rootless environment, it is recommended to use fuse-overlayfs rather than the VFS file system. Installing the fuse3-devel package gives Podman the dependencies it needs to install, build and use fuse-overlayfs in a rootless environment for you. The fuse-overlayfs project is also available from [GitHub](https://github.com/containers/fuse-overlayfs). This especially needs to be checked on Ubuntu distributions as fuse-overlayfs is not generally installed by default.
If podman is installed before fuse-overlayfs, it may be necessary to change the `driver` option under `[storage]` to `"overlay"`.
### Enable user namespaces (on RHEL7 machines)
The number of user namespaces that are allowed on the system is specified in the file `/proc/sys/user/max_user_namespaces`. On most Linux platforms this is preset by default and no adjustment is necessary. However on RHEL7 machines a user with root privileges may need to set that to a reasonable value by using this command: `sysctl user.max_user_namespaces=15000`.