#!/bin/bash

OS=$(cat /etc/os-release | awk 'NR == 1 {print $1, $2}')

if [ "$OS" == 'NAME="Rocky Linux"' ]; then
    dnf install ceph-mds
elif [ "$OS" == 'NAME="Ubuntu"' ]; then
    apt install ceph-mds
else
    echo "OS is not Ubuntu or Rocky Linux"
    exit
fi

BASE_HOSTNAME=$(hostname -s)
HOSTNAME=$BASE_HOSTNAME
COUNTER=1
DIR="/var/lib/ceph/mds/ceph-$HOSTNAME"

while [ -d "$DIR" ]; do
    HOSTNAME="${BASE_HOSTNAME}-${COUNTER}"
    DIR="/var/lib/ceph/mds/ceph-$HOSTNAME"
    ((COUNTER++))
done

mkdir "$DIR"
chown ceph:ceph "$DIR"

ceph auth get-or-create mds.$HOSTNAME mon 'profile mds' mgr 'profile mds' mds 'allow *' osd 'allow *' > "$DIR/keyring"
chown ceph:ceph "$DIR/keyring"

systemctl enable --now ceph-mds@$HOSTNAME

ceph -s

echo -e "\e[1;31mmds-$HOSTNAME\e[0m has been \e[1;32madded\e[0m"