pct-enter

#!/bin/sh
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Copyright 2024 Jeremy Brubaker <jbru362@gmail.com>
#
# abstract: remotely connect to a proxmox container by name
#
# Inspired by https://gist.github.com/Xenthys/eac5c4b46e8ad016ab8d6584883c754a
#
# NOTE: the remote user must have passwordless sudo permissions
#
for b in jq \
    ; do
    if ! command -v "$b" >/dev/null 2>&1; then
        printf "'%s' not found\n" "$b" >&2
        exit 1
    fi
done

if [ -z "$1" ]; then
    printf '%s\n' 'No container requested' >&2
    exit 1
fi
name=$1

if [ -z "$PVE_HOST" ]; then
    printf '%s\n' 'PVE_HOST is undefined' >&2
    exit 1
fi

# Get CT ID by name or number
id=$(ssh "$PVE_HOST" 'sudo pvesh get /cluster/resources --output-format=json' |
    jq -r --arg id "$name" '.[] | select(.name==$id or .vmid==($id|tonumber? // .)) | .vmid')

if [ -z "$id" ]; then
    printf "Container '%s' does not exist.\n" "$name" >&2
    exit 1
fi

# SSH and enter the CT
#
# The `-i` flag is required so that you land in /root
# on entering the CT
ssh -t "$PVE_HOST" sudo -i pct enter "$id"