8bf9247c5e
SONiC is a heavy writer to /var/log partition, we noticed that this behavior causes certain flash drive to become read-only over time. To avoid this issue, we mount /var/log parition on these devices as tmpfs. - Mount /var/log as tmpfs - /var/log default size is 128M - Adjust size according to existing var-log.ext4 file size. - Adjust size to between 5% to 10% of total memory size. Signed-off-by: Ying Xie <ying.xie@microsoft.com>
67 lines
2.4 KiB
Django/Jinja
67 lines
2.4 KiB
Django/Jinja
#!/bin/sh -e
|
|
|
|
PREREQS="varlog"
|
|
|
|
prereqs() { echo "$PREREQS"; }
|
|
|
|
case $1 in
|
|
prereqs)
|
|
prereqs
|
|
exit 0
|
|
;;
|
|
esac
|
|
|
|
set_tmpfs_log_partition_size()
|
|
{
|
|
varlogsize=128
|
|
|
|
# NOTE: certain platforms, when reaching initramfs stage, have a small
|
|
# limit of mounting tmpfs partition, potentially due to amount
|
|
# of RAM available in this stage. e.g. Arista 7050 QX32
|
|
[ X"$aboot_platform" = X"x86_64-arista_7050_qx32" ] && return
|
|
|
|
# set varlogsize to existing var-log.ext4 size
|
|
if [ -f ${rootmnt}/host/disk-img/var-log.ext4 ]; then
|
|
varlogsize=$(ls -l ${rootmnt}/host/disk-img/var-log.ext4 | awk '{print $5}')
|
|
varlogsize=$(($varlogsize/1024/1024))
|
|
fi
|
|
|
|
# make sure varlogsize is between 5% to 10% of total memory size
|
|
memkb=$(grep MemTotal /proc/meminfo | awk '{print $2}')
|
|
memmb=$(($memkb/1024))
|
|
minsize=$(($memmb*5/100))
|
|
maxsize=$(($memmb*10/100))
|
|
|
|
[ $minsize -ge $varlogsize ] && varlogsize=$minsize
|
|
[ $maxsize -le $varlogsize ] && varlogsize=$maxsize
|
|
}
|
|
|
|
## Mount the overlay file system: rw layer over squashfs
|
|
image_dir=$(cat /proc/cmdline | sed -e 's/.*loop=\(\S*\)\/.*/\1/')
|
|
mkdir -p ${rootmnt}/host/$image_dir/rw
|
|
mkdir -p ${rootmnt}/host/$image_dir/work
|
|
mount -n -o lowerdir=${rootmnt},upperdir=${rootmnt}/host/$image_dir/rw,workdir=${rootmnt}/host/$image_dir/work -t overlay root-overlay ${rootmnt}
|
|
## Check if the root block device is still there
|
|
[ -b ${ROOT} ] || mdev -s
|
|
## Mount the raw partition again
|
|
mount ${ROOT} ${rootmnt}/host
|
|
## Mount the working directory of docker engine in the raw partition, bypass the overlay
|
|
mkdir -p ${rootmnt}/var/lib/docker
|
|
mount --bind ${rootmnt}/host/$image_dir/{{ DOCKERFS_DIR }} ${rootmnt}/var/lib/docker
|
|
## Mount the boot directory in the raw partition, bypass the overlay
|
|
mkdir -p ${rootmnt}/boot
|
|
mount --bind ${rootmnt}/host/$image_dir/boot ${rootmnt}/boot
|
|
## Mount loop device or tmpfs for /var/log
|
|
onie_platform=""
|
|
aboot_platform=""
|
|
. ${rootmnt}/host/machine.conf
|
|
if [ X"$aboot_platform" = X"x86_64-arista_7050_qx32" ] ||
|
|
[ X"$aboot_platform" = X"x86_64-arista_7050_qx32s" ]
|
|
then
|
|
set_tmpfs_log_partition_size
|
|
mount -t tmpfs -o rw,nosuid,nodev,size=${varlogsize}M tmpfs ${rootmnt}/var/log
|
|
[ -f ${rootmnt}/host/disk-img/var-log.ext4 ] && rm -rf ${rootmnt}/host/disk-img/var-log.ext4
|
|
else
|
|
[ -f ${rootmnt}/host/disk-img/var-log.ext4 ] && mount -t ext4 -o loop,rw ${rootmnt}/host/disk-img/var-log.ext4 ${rootmnt}/var/log
|
|
fi
|