Podman_tricks.md
· 570 B · Markdown
Raw
## Calculate new SUBUID range:
```sh
PREVIOUS="$(sort -t: -k2 -n /etc/subuid | tail -n1)" && PREVIOUS="${PREVIOUS#*:}" && echo "$PREVIOUS"
# ex.out: 165536:65536
FIRST="$((${PREVIOUS%:*}+${PREVIOUS#*:}))" && echo "$FIRST"
# ex.out: 231072
NEW=${FIRST}-$((${FIRST}+65535)) && echo "$NEW"
# ex.out: 231072-296607
```
Then use that range for the new podman user:
```sh
sudo usermod --add-subuids 231072-296607 --add-subgids 231072-296607 USERNAME
```
Propagate changes: `podman system migrate`
And validate as the new user: `podman unshare cat /proc/self/uid_map`
Calculate new SUBUID range:
PREVIOUS="$(sort -t: -k2 -n /etc/subuid | tail -n1)" && PREVIOUS="${PREVIOUS#*:}" && echo "$PREVIOUS"
# ex.out: 165536:65536
FIRST="$((${PREVIOUS%:*}+${PREVIOUS#*:}))" && echo "$FIRST"
# ex.out: 231072
NEW=${FIRST}-$((${FIRST}+65535)) && echo "$NEW"
# ex.out: 231072-296607
Then use that range for the new podman user:
sudo usermod --add-subuids 231072-296607 --add-subgids 231072-296607 USERNAME
Propagate changes: podman system migrate
And validate as the new user: podman unshare cat /proc/self/uid_map