Add warning about FS incompatibility to the log

[rufengsuixing]

Prerequisites

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed

Issue Details

• Version of AdGuard Home server:
  0.99.2
• How did you setup DNS configuration:
  Router manual config
• If it's a router or IoT, please write device model:
  newifi d1 with mipsel mt7621
• Operating system and version:
  openwrt 18.06

Expected Behavior

start the software

Actual Behavior

root@newifi-d1-home:/usr/bin/AdGuardHome/data# /usr/bin/AdGuardHome/AdGuardHome
-v
2019/11/20 16:16:32 1118#1 [info] AdGuard Home, version v0.99.2, channel release

2019/11/20 16:16:32 1118#1 [debug] Current working directory is /usr/bin/AdGuardHome
2019/11/20 16:16:33 1118#36 [debug] github.com/AdguardTeam/AdGuardHome/home.(*clientsContainer).AddHost(): '127.0.0.1' -> 'localhost' [1]
2019/11/20 16:16:33 1118#36 [debug] github.com/AdguardTeam/AdGuardHome/home.(*clientsContainer).AddHost(): '::1' -> 'localhost' [2]
2019/11/20 16:16:33 1118#36 [debug] github.com/AdguardTeam/AdGuardHome/home.(*clientsContainer).AddHost(): 'ff02::1' -> 'ip6-allnodes' [3]
2019/11/20 16:16:33 1118#36 [debug] github.com/AdguardTeam/AdGuardHome/home.(*clientsContainer).AddHost(): 'ff02::2' -> 'ip6-allrouters' [4]
2019/11/20 16:16:33 1118#36 [debug] Added 4 client aliases from /etc/hosts
2019/11/20 16:16:33 1118#36 [debug] github.com/AdguardTeam/AdGuardHome/home.(*clientsContainer).addFromSystemARP(): executing arp [arp -a]
2019/11/20 16:16:33 1118#36 [debug] command arp has failed: exec: "arp": executable file not found in $PATH code:-1
2019/11/20 16:16:33 1118#36 [debug] Added 0 client aliases from DHCP
2019/11/20 16:16:33 1118#1 [debug] github.com/AdguardTeam/AdGuardHome/home.upgradeConfig(): got schema version 5
2019/11/20 16:16:33 1118#1 [debug] Reading config file: /usr/bin/AdGuardHome/AdGuardHome.yaml
2019/11/20 16:16:33 1118#1 [debug] Writing YAML file: /usr/bin/AdGuardHome/AdGuardHome.yaml
2019/11/20 16:16:33 1118#1 [debug] github.com/AdguardTeam/AdGuardHome/stats.(*statsCtx).dbOpen(): db.Open...
2019/11/20 16:16:33 1118#1 [error] Stats: open DB: /usr/bin/AdGuardHome/data/stats.db: invalid argument
2019/11/20 16:16:33 1118#1 [fatal] Couldn't initialize statistics module

Screenshots

Additional Information

https://github.com/etcd-io/bbolt

[szolin]

As a workaround we can resolve this issue by not loading Stats module if it's disabled in config (statistics_interval: 0)

[rufengsuixing]

no still cannot start ,the same problem

[szolin]

This isn't implemented yet, I'm just proposing one solution (for us to think about), so in next versions users can overcome similar problems.

[ameshkov]

@szolin it would be better to fix this properly instead of disabling the whole module

[rufengsuixing]

i run ln -s /tmp/stats.db /usr/bin/AdGuardHome/data/stats.db and it start
maybe it is a bug due to file system
similar to etcd-io/bbolt#102
my file system info
root@newifi-d1-home:/etc# mount
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
cgroup on /sys/fs/cgroup type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,cpu,cpuacct,blkio,memory,devices,freezer,net_cls,perf_event,pids)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
/dev/mtdblock6 on /overlay type jffs2 (rw,noatime)
overlayfs:/overlay on / type overlay (rw,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/work)
tmpfs on /dev type tmpfs (rw,nosuid,relatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600,ptmxmode=000)
debugfs on /sys/kernel/debug type debugfs (rw,noatime)

[ameshkov]

Hmm, maybe the stats DB was corrupted? What happens if you restart the service?

[szolin]

[error] Stats: open DB: /usr/bin/AdGuardHome/data/stats.db: invalid argument

bolt.Open returns this error and it's not easy to determine what could have caused this. Almost all system methods can return this type of error.

[ameshkov]

bolt.Open returns this error and it's not easy to determine what could have caused this. Almost all system methods can return this type of error.

"invalid argument"? This is weird, they don't provide any details?

[rufengsuixing]

with the code here,i can use it ,but reboot will lost all the database

        touch /usr/bin/AdGuardHome/data/stats.db
	if [ ! -L /usr/bin/AdGuardHome/data/stats.db ]; then
	mv -f /usr/bin/AdGuardHome/data/stats.db /tmp/stats.db
	ln -s /tmp/stats.db /usr/bin/AdGuardHome/data/stats.db
	fi
	touch /usr/bin/AdGuardHome/data/sessions.db
	if [ ! -L /usr/bin/AdGuardHome/data/sessions.db ]; then
	mv -f /usr/bin/AdGuardHome/data/sessions.db /tmp/sessions.db
	ln -s /tmp/sessions.db /usr/bin/AdGuardHome/data/sessions.db
	fi

[ameshkov]

So this is a bug of boltdb then.

@rufengsuixing could you please archive & attach one of these databases? We'd like to check what exactly is wrong with them.

[szolin]

archive & attach one of these databases

I think it's not necessary, because it's most likey this FS isn't supported (tested by bbolt devs):

overlayfs:/overlay on / type overlay