[Semi-solved edit]: To answer my question, I was not able to figure out podman. There's just too little community explanations about it for me to pull myself up by my own bootstraps.
So I went for Incus, which has a lot of community explanations (also via searching LXD) and made an Incus container with a macvlan and put the adguard home docker in that. Ran the docker as "root" and used docker compose since I can rely on the docker community directly, but the Incus container is not root-privileged so my goal of avoiding rootful is solved.
Anyone finding this via search, the magic sauce I needed to achieve a technically rootless adguardhome docker setup was:
sudo incus create gooner # For networking, it doesn't need to be named gooner
sudo incus profile device add gooner eth0 nic nictype=macvlan parent=enp0s10 # Get your version of 'enp0s10' via 'ip addr', macvlan thing won't work with wifi
sudo incus profile set gooner security.nesting=true
sudo incus profile set gooner security.syscalls.intercept.mknod=true
sudo incus profile set gooner security.syscalls.intercept.setxattr=true
# Pause here and make adguardhome instance in the Incus web UI (incus-ui-canonical) with the "gooner" profile
# Make sure all network stuff from docker-compose.yml is deleted
# Put docker-compose.yml in /home/${USER}/server/admin/compose/adguardhome
printf "uid $(id -u) 0\ngid $(id -g) 0" | sudo incus config set adguardhome raw.idmap - # user id -> 0 (root), user group id -> 0 (root) since debian cloud default user is root
sudo incus config device add adguardhome config disk source=/home/${USER}/server/admin/config/adguardhome path=/server/admin/config/adguardhome # These link adguard stuff to the real drive
sudo incus config device add adguardhome compose disk source=/home/${USER}/server/admin/compose/adguardhome path=/server/admin/compose/adguardhome
# !! note that the adguardhome docker-compose.yml must say "/server/configs/adguardhome/work" instead of "/home/${USER}/server/configs/adguardhome/work"
# Install docker
sudo incus exec adguardhome -- bash -c "sudo apt install -y ca-certificates curl"
sudo incus exec adguardhome -- bash -c "sudo install -m 0755 -d /etc/apt/keyrings"
sudo incus exec adguardhome -- bash -c "sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc"
sudo incus exec adguardhome -- bash -c "sudo chmod a+r /etc/apt/keyrings/docker.asc"
sudo incus exec adguardhome -- bash -c 'echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null'
sudo incus exec adguardhome -- bash -c "sudo apt update"
sudo incus exec adguardhome -- bash -c "sudo apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin"
# Disable port 53 binding
sudo incus exec adguardhome -- bash -c "[ -d /etc/systemd/resolved.conf.d ] || mkdir -p /etc/systemd/resolved.conf.d"
sudo incus exec adguardhome -- bash -c "printf "%s\n%s\n" '[Resolve]' 'DNSStubListener=no' | sudo tee /etc/systemd/resolved.conf.d/10-make-dns-work.conf"
sudo incus exec adguardhome -- bash -c "sudo systemctl restart systemd-resolved"
# Run the docker
sudo incus exec adguardhome -- bash -c "docker compose -f /server/admin/compose/adguardhome/docker-compose.yml up -d"
I'm trying to get rootless podman to run adguard home on Debian 12. I run the docker-compose.yml file via podman-compose up -d.
I get errors that I cannot google successfully, sadly. I do occasionally see shards of people saying things like "I have adguard running with rootless podman" but never any guides. So tantalizing.
I have applied this change so rootless can yoink port 53:
sudo nano /etc/sysctl.conf
net.ipv4.ip_unprivileged_port_start=53 # at end, required for rootless podman to be able to do 53
(Do I even need that change with a macvlan?)
The sticking point seems to be the macvlan. I want a macvlan so I can host a PiHole as a redundant fallback on the same server. I error with:
Error: netavark: Netlink error: No such device (os error 19) and that error really gets me no where searching for it. I am berry sure the ethernet connection is named enp0s10 and spelled right in the docker-compose file, cause I copied and pasted it in.
I tried forcing the backend to "CNI" but probably did it wrong, it complained about:
WARN[0000] Failed to load cached network config: network dockervlan not found in CNI cache, falling back to loading network dockervlan from disk
WARN[0000] 1 error occurred:
* plugin type="macvlan" failed (delete): cni plugin macvlan failed: Link not found
(I also made a /etc/cni/net.d/90-dockervlan.conflist file for cni but it didn't seem to see it and I couldn't muster how to get it to see it)
Both still occur if I pre-make the dockervlan with:
podman network create -d macvlan -o parent=enp0s10 --subnet 10.69.69.0/24 --gateway 10.69.69.1 --ip-range 10.69.69.69/32 dockervlan
And adjust the compose file's networks: call to:
networks:
dockervlan:
external: true
name: dockervlan
Has anyone succeeded at this or done something similar?
docker-compose.yml:
version: '3.9'
#
***
NETWORKS
***
networks:
dockervlan:
name: dockervlan
driver: macvlan
driver_opts:
parent: enp0s10
ipam:
config:
- type: "host-local"
- dst: "0.0.0.0/0"
- subnet: "10.69.69.0/24"
rangeStart: "10.69.69.69/32" # This range should include the ipv4_address: in services:
rangeEnd: "10.69.69.79/32"
gateway: "10.69.69.1"
#
***
SERVICES
***
services:
adguardhome:
container_name: adguardhome
image: docker.io/adguard/adguardhome
hostname: adguardhome
restart: unless-stopped
networks:
dockervlan:
ipv4_address: 10.69.69.69# IP address inside the defined dockervlan range
volumes:
- '/home/${USER}/server/configs/adguardhome/work:/opt/adguardhome/work'
- '/home/${USER}/server/configs/adguardhome/conf:/opt/adguardhome/conf'
#- '/home/${USER}/server/certs/example.com:/certs # optional: if you have your own SSL certs
ports:
- '53:53/tcp'
- '53:53/udp'
- '80:80/tcp'
- '443:443/tcp'
- '443:443/udp'
- '3000:3000/tcp'
podman 4.3.1
podman-compose 1.0.6
Getting a newer podman-compose is pretty easy peasy, idk about newer podman if that's needed to fix this.
No this is me when someone calls me to ask my plans for the weekend knowing full well I haven’t seen the sun in years