_Docker Daemon

These configs have stumped me one too many times.

Issue: Why is my docker host having trouble resolving DNS?
After enabling pi-hole or other dockerized DNS management app, lack of (systemd-resolved e.t.c. means that DNS is not available on a local level prior to docker to so much as pull pi-hole. (wonderful chick needs to lay its own egg scenario) A great solution I found to this issue is to set the DNS for docker explicitly.

Issue: Why aren't the nvidia drivers workable on my system.
Gotta love the oversight, better remember to request gpu here as well as in the compose. 🤦‍♀️

Issue: After creating about 40 stacks / docker containers ... I can no longer create new ones with unique ips...
As seen below we need to set/allow additional ranges of IP addresses for docker to use in addition to those available by default. You can use something like below or adjust to a set of IPs not taken elsewhere on your network.

{
    "runtimes": {
        "nvidia": {
            "args": [],
            "path": "nvidia-container-runtime"
        }
    },

    "default-address-pools" : [
        {
            "base" : "172.50.0.0/12",
            "size" : 20
            },
        {
            "base" : "192.168.30.0/16",
            "size" : 24
        }
    ],
    "dns": ["<pihole#1>", "<pihole#2>", "1.1.1.1", "8.8.8.8"]
}

Note: 
Later when I describe how to setup pihole remind me to note that we need to turn off that below and update the dns for docker.

Pi-Hole
sudo systemctl stop systemd-resolved