Troubleshoot the system¶

This section describes how to verify the Linux system status.

To perform the Linux status check:

1. Log in to the OpenStack controller node that you want to troubleshoot.

2. Verify that there is enough space on the disk:

   df -h
   

   Example system response:

   Filesystem      Size  Used Avail Use% Mounted on
   /dev/sda1        20G  4.5G   15G  25% /
   tmpfs           939M  328K  939M   1% /dev/shm
   /dev/sdd1       3.9G   11M  3.7G   1% /tmp
   /dev/sdc1       9.8G  102M  9.2G   2% /var/log
   /dev/sde        3.9G   34M  3.6G   1% /var/log/audit
   tmpfs           512M     0  512M   0% /config
   

3. Check the available inodes:

   df -i
   

   Example system response:

   Filesystem       Inodes  IUsed    IFree IUse% Mounted on
   /dev/sda1      14589952 387481 14202471    3% /
   none            2038052     13  2038039    1% /sys/fs/cgroup
   udev            2035377    518  2034859    1% /dev
   tmpfs           2038052    591  2037461    1% /run
   none            2038052      5  2038047    1% /run/lock
   none            2038052    118  2037934    1% /run/shm
   none            2038052     35  2038017    1% /run/user
   

4. Verify that there is enough amount of memory:

   free m
   

   Example system response:

                total       used       free     shared    buffers     cached
   Mem:       1922208    1839352      82856        500     415068     525944
   -/+ buffers/cache:     898340    1023868
   Swap:      4193276       1544    4191732
   

5. Verify if there are no processes that use all available memory/CPU:

   htop
   

   Example system response:

   top - 11:46:28 up 40 days, 22:35,  3 users,  load average: 0.00, 0.00, 0.03
   Tasks: 218 total,   1 running, 217 sleeping,   0 stopped,   0 zombie
   Cpu(s):  2.8%us,  1.5%sy,  0.0%ni, 95.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
   Mem:   1922208k total,  1829060k used,    93148k free,   415108k buffers
   Swap:  4193276k total,     1544k used,  4191732k free,   526056k cached