While migrating to SONiC 20181130, identified a couple of issues:
1. union-mount needs /host/machine.conf parameters for vendor specific checks : however, in case of migration, the /host/machine.conf is extracted from ONIE only in https://github.com/Azure/sonic-buildimage/blob/master/files/image_config/platform/rc.local#L127.
2. Since grub.cfg is updated to have net.ifnames=0 biosdevname=0, 70-persistent-net.rules changes are no longer required.
* Run fsck filesystem check support prior mounting filesystem
If the filesystem become non clean ("dirty"), SONiC does not run fsck to
repair and mark it as clean again.
This patch adds the functionality to run fsck on each boot, prior to the
filesystem being mounted. This allows the filesystem to be repaired if
needed.
Note that if the filesystem is maked as clean, fsck does nothing and simply
return so this is perfectly fine to call fsck every time prior to mount the
filesystem.
How to verify this patch (using bash):
Using an image without this patch:
Make the filesystem "dirty" (not clean)
[we are making the assumption that filesystem is stored in /dev/sda3 - Please adjust depending of the platform]
[do this only on a test platform!]
dd if=/dev/sda3 of=superblock bs=1 count=2048
printf "$(printf '\\x%02X' 2)" | dd of="superblock" bs=1 seek=1082 count=1 conv=notrunc &> /dev/null
dd of=/dev/sda3 if=superblock bs=1 count=2048
Verify that filesystem is not clean
tune2fs -l /dev/sda3 | grep "Filesystem state:"
reboot and verify that the filesystem is still not clean
Redo the same test with an image with this patch, and verify that at next reboot the filesystem is repaired and becomes clean.
fsck log is stored on syslog, using the string FSCK as markup.
when device disk is small, do not unzip dockerfs.tar.gz on disk.
keep the tar file on the disk, unzip to tmpfs in the initrd phase.
enabled this for 7050-qx32
Signed-off-by: Guohan Lu <gulv@microsoft.com>
* [ARISTA] adding 7060_cs32s to eMMC exclusions
Following PR 2774 we added the 7060-cx32s according to the guidelines of
PR 2780
This adds the 7060-cx32s to the list f devices that mount /var/log as a
tmpfs to mitigate eMMC wearout
Signed-off-by: Michel Moriniaux <m.moriniaux@criteo.com>
* [ARISTA] adding 7060_cs32s to eMMC exclusions
Following PR 2774 we added the 7060-cx32s according to the guidelines of
PR 2780
This adds the 7060-cx32s to the list f devices that mount /var/log as a
tmpfs to mitigate eMMC wearout
Signed-off-by: Michel Moriniaux <m.moriniaux@criteo.com>
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>
moving to initramfs unifies disk allocate on different platforms.
use fallocate instead of dd to speed up the disk allocation.
By default, mkfs.ext4 has -E discard option which discards the blocks
at the mkfs time, also speed up the initialization time.
On some platforms after the initramfs init scripts have mounted the root device its
block device disapear from /dev. The union-mount script therefore can't mount the
root device over the aufs. If this case happen, issue a rescan of the devices to
repopulate the /dev filesystem.
