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docs/rootless.md: drop support for Debian 9 and Fedora 30 

Debian 9 has reached EOL on 2020-07-06: https://wiki.debian.org/DebianReleases
Fedora 30 has reached EOL on 2020-05-26: https://fedoraproject.org/wiki/End_of_life

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
v0.8
Akihiro Suda 2020-07-27 14:34:56 +09:00
parent f22f2fc103
commit 444d506251
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@ -9,26 +9,18 @@ Using Ubuntu kernel is recommended.
* No preparation is needed.
* `overlayfs` snapshotter is used by default ([Ubuntu-specific kernel patch](https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/commit/fs/overlayfs?id=3b7da90f28fe1ed4b79ef2d994c81efbc58f1144)).
### Debian GNU/Linux 10
### Debian GNU/Linux
* Add `kernel.unprivileged_userns_clone=1` to `/etc/sysctl.conf` (or `/etc/sysctl.d`) and run `sudo sysctl -p`
* `fuse-overlayfs` snapshotter is used by default.
* To use `overlayfs` snapshotter (recommended), run `sudo modprobe overlay permit_mounts_in_userns=1` ([Debian-specific kernel patch, introduced in Debian 10](https://salsa.debian.org/kernel-team/linux/blob/283390e7feb21b47779b48e0c8eb0cc409d2c815/debian/patches/debian/overlayfs-permit-mounts-in-userns.patch)). Put the configuration to `/etc/modprobe.d` for persistence.
### Debian GNU/Linux 9
* Add `kernel.unprivileged_userns_clone=1` to `/etc/sysctl.conf` (or `/etc/sysctl.d`) and run `sudo sysctl -p`
* Only `native` snapshotter can be used.
### Arch Linux
* Add `kernel.unprivileged_userns_clone=1` to `/etc/sysctl.conf` (or `/etc/sysctl.d`) and run `sudo sysctl -p`
* `fuse-overlayfs` snapshotter is used by default if running kernel >= 4.18.
Otherwise only `native` snapshotter can be used.
### Fedora 31
* If you don't have the latest `runc` installed and you have `crun` instead, you need to run `buildkitd` with `--oci-worker-binary=crun`.
* `fuse-overlayfs` snapshotter is used by default.
### Fedora 30
* No preparation is needed.
### Fedora
* If you don't have the latest `runc` (>= v1.0.0-rc91) installed and you have `crun` instead, you need to run `buildkitd` with `--oci-worker-binary=crun`.
* `fuse-overlayfs` snapshotter is used by default.
### RHEL/CentOS 8