💡 Feature request: Add option to disable IPV6

[broizter]

Currently redlib will not start on a host where IPV6 is disabled. I would like to see an environment variable to disable binding to ipv6.

error binding to [::]:8080: error creating server listener: Address family not supported by protocol (os error 97)

[Tokarak]

Meanwhile, you can work around by binding to 0.0.0.0:8080, which is all ipv4 addresses.

[broizter]

Meanwhile, you can work around by binding to 0.0.0.0:8080, which is all ipv4 addresses.

I could only find an option to chose the port to bind to, not address. How do you define what address to bind to?

[Tokarak]

     Running `/Users/tok/.cargo/cache/release/redlib --help`
Private front-end for Reddit written in Rust

Usage: redlib [OPTIONS]

Options:
  -r, --redirect-https
          Redirect all HTTP requests to HTTPS (no longer functional)
  -a, --address <ADDRESS>
          Sets address to listen on [default: [::]]
  -p, --port <PORT>
          Port to listen on [env: PORT=] [default: 8080]
  -H, --hsts <EXPIRE_TIME>
          HSTS header to tell browsers that this site should only be accessed over HTTPS [default: 604800]
      --no-https-verification <no-https-verification>
          Disables HTTPS certificate verification between the instance and reddit. This can be useful to debug the HTTPS connection with an HTTPS sniffer. Only works when the 'no-https-verification' feature is enabled at compile time.
  -h, --help
          Print help
  -V, --version
          Print version

to pass options to the binary through cargo:
cargo run -- --help

[broizter]

Is it possible to pass that command line option through docker without modifying the dockerfile itself? When adding it like I usually would I get an error

Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "-a": executable file not found in $PATH: unknown

[Tokarak]

You need to change the Docker Compose file, not the Dockerfile. I haven't actually used the release container image.

[broizter]

I tried

command:
  - "-a 0.0.0.0"

and

command:
  - "-a"
  -  "0.0.0.0"

in my compose.yaml neither of them worked. It gave me the error message I attached in previous post.

[Tokarak]

You're right, I checked the compose and Dockerfile. Everything is hardcoded in the Dockerfile. This should be changed. The cli flags should be specified in the compose file rather than in the Dockerfile. This could go in a new issue.

As to resolve your issue: maybe ipv6 can be disabled in docker or in the container? Check the Network sections of the compose file.

[broizter]

I managed to make it work now. The correct thing to add to your compose file is:

command:
  - "/usr/local/bin/redlib"
  - "-a"
  - "0.0.0.0"

I will leave this issue open though because I think there should be an environment variable in the same way there is one for what port to bind to.

[Tokarak]

Nice! It's strange that the default compose.yml doesn't have a "command" section, though.