setup-cache-magento

#!/bin/bash -xe

VGNAME=eph

# now we need to check that we use ephemeral disk as /dev/xvdb
# its very naive check but better then nothing because operations above can be dangerous
if ! lsblk | grep '^xvdb' | grep 75G > /dev/null ; then
  echo "Problems with expectations for /dev/xvdb"
  exit 1
fi


if ! vgdisplay -s $VGNAME &> /dev/null ; then
  echo "No vg $VGNAME"
  pvcreate /dev/xvdb
  vgcreate -s 1G $VGNAME /dev/xvdb
else
  echo "VG $VGNAME exists"
fi

echo -n "noop" > /sys/block/xvdb/queue/scheduler

# setup nginx cache
if lvcreate -n nginx-cache -L 2G eph ; then
  mkfs.ext4  /dev/eph/nginx-cache
fi

if ! findmnt /cache/nginx-cache/ &> /dev/null; then
  systemctl stop nginx
  rm -rf /cache/nginx-cache
  mkdir /cache/nginx-cache/
  mount -o discard,noatime,commit=600 /dev/eph/nginx-cache  /cache/nginx-cache/
  chown www-data:root /cache/nginx-cache/
  chmod 0700 /cache/nginx-cache/
  systemctl start nginx
fi

# setup magentoo catalog-cache
if lvcreate -n catalog-cache -L 6G eph ; then
  mkfs.ext4 /dev/eph/catalog-cache
fi

if ! findmnt /cache/catalog-cache &> /dev/null; then
  mkdir -p /cache/catalog-cache
  mount -o discard,noatime,commit=600 /dev/eph/catalog-cache /cache/catalog-cache/
  chown shop_production:shop_production /cache/catalog-cache/
  chmod 0777 /cache/catalog-cache/
  cd /home/shop_production/htdocs/media/catalog/product/
  rm -rf cache
  ln -s /cache/catalog-cache cache; chown shop_production:shop_production cache
fi


# setup main magento cache
if lvcreate -n shop-cache -L 10G eph ; then
  mkfs.ext4 /dev/eph/shop-cache
fi

if ! findmnt /cache/shop-cache &> /dev/null; then
  mkdir -p /cache/shop-cache
  mount -o discard,noatime,commit=600 /dev/eph/shop-cache /cache/shop-cache/
  chown shop_production:shop_production /cache/shop-cache/
  chmod 0777 /cache/shop-cache/
  cd /home/shop_production/htdocs/var
  rm -rf cache
  ln -s /cache/shop-cache cache
  chown shop_production:shop_production cache
fi

echo "All done"