Manage Flexget daemon which is running inside a separated network namespace

flexgetctl

#!/bin/bash 

set -euo pipefail

NETNS="torrent"
FLEXGETDIR="/opt/flexget"

# sanity check
if [ $# -gt 1 ]; then
    echo "Too many arguments"
    exit 1
elif [ $# -lt 1 ]; then
    echo "Too few arguments, see $0 help for more details" 
    exit 1
fi

# check if flexget is running
FLEXGETPID=$(pgrep -x flexget)

if [ -n "${FLEXGETPID}" ]; then
    FLEXGETUSER=$(ps -o euser= $FLEXGETPID)
else 
    echo "FlexGet daemon is not running, see systemctl status flexget for more details"
    exit 1
fi

# runtime
case "${1}" in
    status)
        ip netns exec "${NETNS}" sudo -u "${FLEXGETUSER}" "${FLEXGETDIR}/bin/flexget" "daemon" "status"
        ;;
    reload-config)
        ip netns exec "${NETNS}" sudo -u "${FLEXGETUSER}" "${FLEXGETDIR}/bin/flexget" "daemon" "reload-config"
        ;;
    execute)
        ip netns exec "${NETNS}" sudo -u "${FLEXGETUSER}" "${FLEXGETDIR}/bin/flexget" "execute"
        ;;
    check)
        ip netns exec "${NETNS}" sudo -u "${FLEXGETUSER}" "${FLEXGETDIR}/bin/flexget" "check"
        ;;
    # help: https://flexget.com/Daemon
    help)
        echo "Control Flexget Daemon running inside a separated network namespace"
        echo "Usage:"
        echo -e "\t$0 status \t\tdisplay status of configured tasks"
        echo -e "\t$0 reload-config \treload configuration"
        echo -e "\t$0 execute \t\texecute all tasks immediatelly"
        echo -e "\t$0 check \t\tcheck configuration"
        exit 0 
        ;; 
    # exit if invalid/unknown option is used
    *)
        echo "Invalid option, see $0 help for more details"
        exit 1
        ;;
esac

sudoers

# /etc/sudoers.d/torrent
Cmnd_Alias TR_START=/usr/bin/systemctl start transmission-daemon*
Cmnd_Alias TR_STATUS=/usr/bin/systemctl status transmission-daemon*
Cmnd_Alias TR_RESTART=/usr/bin/systemctl restart transmission-daemon*
Cmnd_Alias TR_STOP=/usr/bin/systemctl stop transmission-daemon*
Cmnd_Alias FLEXGETCTL=/usr/local/bin/flexgetctl
pawel ALL=(ALL) NOPASSWD: TR_START,TR_STATUS,TR_RESTART,TR_STOP,FLEXGETCTL

Sudoers example:

pawel ALL=(ALL) NOPASSWD:/usr/local/bin/flexgetctl

and:

chown root:root /usr/local/bin/flexgetctl
chmod 755 /usr/local/bin/flexgetctl