vm-ssh

#!/bin/bash

# vm-ssh - Quick virtctl SSH wrapper
#
# Opens an SSH session to a KubeVirt VM via virtctl.
#
# Usage: vm-ssh <vm-name> <namespace> [user]
#   user defaults to 'root' if not specified

set -eu

fatal() {
    echo "Error: $*" >&2
    exit 1
}

usage() {
    cat <<EOF
Usage: $(basename "$0") <vm-name> <namespace> [user]

Open an SSH session to a KubeVirt VM via virtctl.

Arguments:
    vm-name      Name of the virtual machine
    namespace    Kubernetes namespace
    user         SSH user (default: root)
EOF
    exit "${1:-0}"
}

if [[ "${1:-}" == "-h" ]] || [[ "${1:-}" == "--help" ]]; then
    usage 0
fi

if [[ -z "${1:-}" ]] || [[ -z "${2:-}" ]]; then
    usage 1
fi

VM=$1
NS=$2
USER=${3:-root}

if [[ -z "$(type -t virtctl)" ]]; then
    fatal "virtctl command is not installed (see helpers/install-virtctl)"
fi

# Avoid "Too many authentication failures": skip pubkey so we don't exhaust server MaxAuthTries
exec virtctl ssh \
	--local-ssh-opts="-o PasswordAuthentication=yes" \
	--local-ssh-opts="-o PubkeyAuthentication=no" \
	-n "$NS" "$USER@vmi/$VM"