Override daemon.json configuration

[zloidemon]

I had my configuration:

{
	"hosts": [
		"tcp://127.0.0.1:2375",
		"unix:///var/run/docker.sock"
	]
}

After installation it changed to:

{
    "runtimes": {
        "nvidia": {
            "path": "/usr/bin/nvidia-container-runtime",
            "runtimeArgs": []
        }
    }
}

Although it should looks like

{
    "hosts": [
        "tcp://127.0.0.1:2375",
        "unix:///var/run/docker.sock"
    ],
    "runtimes": {
        "nvidia": {
            "path": "/usr/bin/nvidia-container-runtime",
            "runtimeArgs": []
        }
    }
}

[flx42]

apt-get should have complained when the package was installed, right?

Unfortunately, it would not be trivial to merge our file with an existing one when installing the package. It would require merging 2 JSON files in a shell script.

Until we can have a better solution (maybe by asking the Docker community), did you consider using a systemd drop-in file for your other settings? That's what we do internally when deploying docker with a custom configuration + nvidia-docker 2.0. The base settings of dockerd (hosts, storage driver, bridge IP and CIDR range for docker0, log driver, etc.) are in the drop-in file.

That's what I have on my machine:

$ sudo cat /etc/systemd/system/docker.service.d/override.conf 
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --host=fd:// --storage-driver=overlay2

[zloidemon]

Yeah, I might add that configuration to init file, i've just showed the issue. I'm able to modify my files by hands. You can close that issue if it won't nvidia-docker issue

[eromoe]

I merge the file after nvidia-docker installed:

{
    "registry-mirrors": ["https://mytfd7zc.mirror.aliyuncs.com"],
    "insecure-registries" : [ "10.142.55.199:5006"] },
    "graph": "/data/dockerdata",
    "runtimes": {
        "nvidia": {
            "path": "/usr/bin/nvidia-container-runtime",
            "runtimeArgs": []
        }
    }
}

But still get error docker: Error response from daemon: Unknown runtime specified nvidia.

[flx42]

https://github.com/NVIDIA/nvidia-docker/wiki/Frequently-Asked-Questions#why-do-i-get-the-error-unknown-runtime-specified-nvidia