Skip to content

Caddy: Added NET_BIND_SERVICE note #2620

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
+2 −0
Open

Caddy: Added NET_BIND_SERVICE note #2620

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions caddy/content.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -121,6 +121,8 @@ Giving the container this capability is optional and has potential, though unlik

See https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes for more details.

This image adds the `NET_BIND_SERVICE` capability to the Caddy executable, to allow a non-root user to bind to privileged ports (<1024) such as 80 and 443. If you're not using privileged ports and would like to drop the capability again, you can do so using `RUN setcap cap_net_bind_service=-ep /usr/bin/caddy`. This avoids the error `exec /usr/bin/caddy: operation not permitted` when the container process does not have the capability.

### Docker Compose example

If you prefer to use `docker compose` to run your stack, here's a sample service definition which goes in a file named `compose.yaml`. The configuration assumes you put a custom Caddyfile into `$PWD/conf` as described [above](#basic-usage).
Expand Down