Troubleshoot the system

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