#!/bin/sh
set -eu
echo "Disabled udev in lvm config"
sed -i -e 's/udev_rules.*/udev_rules = 0/' -e 's/udev_scan.*/udev_scan = 0/' /etc/lvm/lvm.conf

mkdir -vp "$$VOL_DIR"
pvcName=$$(basename "$$VOL_DIR")

if ! [ -L "/dev/ien/$$pvcName" ]; then
    echo "Creating a new logical volume called $pvcName"
    lvcreate -v -V"$$VOL_SIZE_BYTES"b -T ien/lvthin -n "$$pvcName"
else
    echo "Tried creating a new logical volume called $$pvcName but it already exists"
fi

vol_realp=$$(readlink -f "/dev/ien/$$pvcName")
if ! findmnt --source "$$vol_realp" >/dev/null; then
    echo "Checking for Ext4 filesystem"
    if ! e2fsck -fvy /dev/ien/"$$pvcName"; then
        echo "Creating an Ext4 filesystem on a logical volume called $$pvcName"
        wipefs --all --force /dev/ien/"$$pvcName"
        mkfs.ext4 -v /dev/ien/"$$pvcName"
    fi

    tunePerc=1
    echo "Setting ext4 reserved blocks in $${pvcName} to $${tunePerc}%"
    tune2fs -m"$$tunePerc" /dev/ien/"$$pvcName"

    mount -v /dev/ien/"$$pvcName" "$$VOL_DIR"
else
    echo "$$pvcName is already mounted"
fi

echo "Shutting down linkerd-proxy"
curl -X POST http://localhost:4191/shutdown || true