add-ceph-osd-prerequisites

#!/bin/bash

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

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

cat <<EOF > /etc/sysctl.d/ceph-tunings.conf
fs.aio-max-nr=1048576
fs.file-max=26234859
vm.zone_reclaim_mode=0
vm.swappiness=0
vm.min_free_kbytes=4194303
kernel.pid_max=4194304
EOF

sysctl -p /etc/sysctl.d/ceph-tunings.conf

if [ "$OS" == 'NAME="Rocky Linux"' ] ; then

cat <<EOF > /etc/sysconfig/ceph
CLUSTER=ceph
TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES=134217728
EOF

elif [ $OS == 'NAME="Ubuntu"' ]; then

cat <<EOF > /etc/default/ceph
CLUSTER=ceph
TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES=134217728
EOF

fi

ceph -s

echo -e "\e[1;31m$(hostname -s)\e[0m has ceph osd tunings \e[1;32mapplied\e[0m"