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Russell Fulton
Asked: 2023-05-10 12:45:22 +0800 CST

using docker on linux with squid proxy. -- ubuntu 20.04

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I have docker 20.10.21 installed from apt. The machine is not directly connected to the internet so we rely on our squid proxy.

I have set up a daemon.json file:

rful011@secphires01:~$ cat /etc/docker/daemon.json
{
     "http-proxy": "http://squid.auckland.ac.nz:3128",
     "https-proxy": "http://squid.auckland.ac.nz:3128",
     "no-proxy": "*.auckland.ac.nz"
}

as described here.

starting dockerd gives:

rful011@secphires01:~$ sudo /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
unable to configure the Docker daemon with file /etc/docker/daemon.json: the following directives don't match any configuration option: no-proxy, http-proxy, https-proxy

Clearly I am missing something.

docker

1 Answers

  1. Best Answer

    Ubuntu 20.04 ships Docker in version 20.10.

    According to the documentation you need at least 23.0 to configure the proxy this way:

    The daemon can be configured in three ways:

    • Using environment variables (HTTP_PROXY, HTTPS_PROXY, and NO_PROXY).
    • Using the “http-proxy”, “https-proxy”, and “no-proxy” fields in the daemon configuration file (Docker Engine 23.0 or newer).
    • Using the --http-proxy, --https-proxy, and --no-proxy command-line options. (Docker Engine 23.0 or newer).

    So you either need to install a newer Docker version or you need to use environment variables.

    You can use sudo systemctl edit docker to create a systemd drop in and configure environment variables there.

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