Swift的相关问题

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swift配置时，一般会在系统里单独挂载一个目录，然后当修改配置后，有时候会在系统启动时挂载磁盘时出现错误。

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Continue to wait; or Press S to skip mounting or M for manual recovery

在配置swift时都会配置/etc/fstab这个文件，会让系统启动时自动挂载设备。
想要跳过这个错误，也可以在该配置文件中加参数nobootwait

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UUID=1234-5678 /osshare vfat utf8,auto,rw,user,nobootwait 0 0

具体的可以man fstab来查看相关信息

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The  mountall(8) program that mounts filesystem during boot also recognises additional options that the ordinary  mount(8) tool does not. These are:  bootwait which can be applied to remote filesystems mounted outside of /usr or /var, without which mountall(8) would not hold up the boot for these; nobootwait which can be applied to non-remote filesystems to explicitly instruct mountall(8) not to hold up the boot for them;

在用devstack安装开发环境后，如果重启，swift服务经常就不能用了。

根据信息查看了目录mount情况

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stack@magnum:/opt/stack/solum$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            987M  4.0K  987M   1% /dev
tmpfs           200M  544K  200M   1% /run
/dev/dm-0        91G  6.5G   80G   8% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
none            5.0M     0  5.0M   0% /run/lock
none           1000M  944K  999M   1% /run/shm
none            100M     0  100M   0% /run/user
/dev/sda1       236M   41M  183M  19% /boot

少了一个和swift相关的挂载

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/dev/loop0      6.0G  873M  5.2G  15% /opt/stack/data/swift/drives/sdb1

找到默认情况下，swift创建的swift.img，然后手动挂载上去

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mount -t xfs -o loop,noatime,nodiratime,nobarrier,logbufs=8 /opt/stack/data/swift/drives/images/swift.img /opt/stack/data/swift/drives/sdb1/

最后还要把这个加到/etc/fstab里，重启时自动挂载，注意这里也加了上面提到的nobootwait

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/opt/stack/data/swift/drives/sdb1/ /opt/stack/data/swift/drives/images/swift.img xfs noatime,nodiratime,nobootwait,nobarrier,logbufs=8 0 0