Remote Host with older API

[KiraAkashiya]

I am using remote host to connect to a second server "tcp://x.x.x.x:2375" which does connect but Dozzle uses higher API than what my server uses

"Get "http://x.x.x.x:2375/v1.51/info\" when I open the URL, I get error {"message":"client version 1.51 is too new. Maximum supported API version is 1.47"}

if I manual change URL http://x.x.x.x:2375/v1.47/info, it retrieves data.

Is there anyway to set Dozzle to use lower API? I am using Unraid so I cannot update the Docker Version.

[amir20]

I use FromEnv from Docker. You should be able to override the version with env vars.

// FromEnv configures the client with values from environment variables. It
// is the equivalent of using the [WithTLSClientConfigFromEnv], [WithHostFromEnv],
// and [WithVersionFromEnv] options.
//
// FromEnv uses the following environment variables:
//
//   - DOCKER_HOST ([EnvOverrideHost]) to set the URL to the docker server.
//   - DOCKER_API_VERSION ([EnvOverrideAPIVersion]) to set the version of the
//     API to use, leave empty for latest.
//   - DOCKER_CERT_PATH ([EnvOverrideCertPath]) to specify the directory from
//     which to load the TLS certificates ("ca.pem", "cert.pem", "key.pem').
//   - DOCKER_TLS_VERIFY ([EnvTLSVerify]) to enable or disable TLS verification
//     (off by default).

I haven't personally tested it though.

[amir20]

But I am also using WithAPIVersionNegotiation(), which I would assume you don't need to do this. So I am not sure why this is happening.

[KiraAkashiya]

does not seems to be working or I am doing something wrong.

I use Unraid, so i tried putting it as a variable and does not work.

[amir20]

I don't have unraid. I'll try creating a test machine with older docker. If I can reproduce it then I can try to fix it.

[amir20]

I installed an older Docker. Still not reproducing for me.

[KiraAkashiya]

level=info
version=v8.13.11
host.available=false
host.dockerVersion=
host.endpoint=tcp://x.x.x.x:2375
host.id=tcp:x.x.x.x:2375
host.memTotal=0
host.nCPU=0
host.name=xxx
host.type=
time=2025-09-02T15:37:52Z
message=Adding remote host

i recheck the logs and found the suspected issue why the negotiation does not work

it adds the remote host but during adding, it does not able to pull "host.dockerVersion="

[amir20]

Huh? I don't understand? DOCKER_API_VERSION won't do anything visible to the logs.

[amir20]

Turns out the issue with dtop was different. Since I don't have Unraid, you'l have to give me a way to reproduce this. Open a bug and provide all the details on how you configured it. Other people are using Unraid and Dozzle so most likely something is up with your setup.