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Expand on information about libseccomp

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Signed-off-by: Adam Warner <me@adamwarner.co.uk>
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Adam Warner 2022-04-25 17:39:00 +01:00
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- **Using Watchtower? See the [Note on Watchtower](#note-on-watchtower) at the bottom of this readme**
- You may run into issues running `2022.04` and later on `buster`-based host systems due to [a known issue with Seccomp](https://github.com/moby/moby/issues/40734). The first recommendation is to upgrade your host OS to `bullseye`, which includes a more up to date (and fixed) version of `libseccomp2`.
_If you absolutely cannot do this, some users [have reported](https://github.com/pi-hole/docker-pi-hole/issues/1042#issuecomment-1086728157) success in updating `libseccomp2` via backports. You can try this workaround at your own risk_
- Due to [a known issue with Docker and libseccomp <2.5](https://github.com/moby/moby/issues/40734), you may run into issues running `2022.04` and later on host systems with an older version of `libseccomp2` ([Such as Debian/Raspbian buster or Ubuntu 20.04](https://pkgs.org/download/libseccomp2), and maybe [CentOS 7](https://pkgs.org/download/libseccomp)).
The first recommendation is to upgrade your host OS, which will include a more up to date (and fixed) version of `libseccomp`.
_If you absolutely cannot do this, some users [have reported](https://github.com/pi-hole/docker-pi-hole/issues/1042#issuecomment-1086728157) success in updating `libseccomp2` via backports on debian, or similar via updates on Ubuntu. You can try this workaround at your own risk_
- Some users [have reported issues](https://github.com/pi-hole/docker-pi-hole/issues/963#issuecomment-1095602502) with using the `--privileged` flag on `2022.04` and above. TL;DR, don't use that that mode, and be [explicit with the permitted caps](https://github.com/pi-hole/docker-pi-hole#note-on-capabilities) (if needed) instead