# Systems Monitoring

This page contains information on monitoring system resources and performance.

For information on monitoring data content and activity see:

 * [[/contentdiscovery]]
 * [[/antivirus]]
 * [[/auditwatch]]
 * [[/audit/event/stream]]


## Network Monitoring

To check your site is accessible you can check that the login page of the web file manager is available and responsive.

To check also that server is operational over a network you can call an API to check, for example, that a folder exists. There is such a script available under [[https://github.com/SMEStorage/filefabric-scripts/tree/main/monitoring|Access Anywhere scripts for monitoring]].
## Appliance Monitoring

You can use any platform that supports monitoring of CentOS 7 including [[:snmp|SNMP]].

For example, with the Amazon Cloud you could use CloudWatch as noted in [[/aws-gettingstarted#systems_monitoring|Getting Started with AWS Cloud - Systems Monitoring]].

We recommend monitoring the following metrics.



### Base OS

    vmstat    
    Procs           
    r: The number of processes waiting for run time.           
    b: The number of processes in uninterruptible sleep.     
    Memory           
    swpd: the amount of virtual memory used.           
    free: the amount of idle memory.           
    active: the amount of active memory.       
    Swap           
    si: Amount of memory swapped in from disk (/s).           
    so: Amount of memory swapped to disk (/s).     
    IO           
    bi: Blocks received from a block device (blocks/s).           
    bo: Blocks sent to a block device (blocks/s).     
    CPU           
    us: Time spent running non-kernel code. (user time, including nice time)           
    sy: Time spent running kernel code. (system time)           
    id: Time spent idle.             
    st: Time stolen from a virtual machine.%%''


### Disk Space

    df -k
    Filesystem                1K-blocks         Used Available Use% Mounted on/dev/mapper/VolGroup00-LogVol00                                 18187836    2903080   14345956   17% //dev/sda1
         101086        20047      75820   21% /boottmpfs
         512468            0     512468    0% /dev/shm%%'

### MySQL

Number of connections

    SHOW STATUS LIKE "Connections"

If you are using MariaDB replication you could also use the database replication monitoring script. See [[https://github.com/SMEStorage/filefabric-scripts/tree/main/monitoring|Access Anywhere scripts for monitoring]].

### Network Usage

Monitor the network traffic using your monitoring system. Or you can get the information from

    cat /proc/net/dev

### Total Number of Processes

    ps -e|sed 1d|wc -l

## Recipes

### Increasing Disk Space

To increase the disk space please follow the instructions at the following [[http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&docTypeID=DT_KB_1_1&externalId=1006371|vmware kb article]]

### Attaching a new Disk to The Appliance

To add a new disk to the appliance please follow the instructions at the following [[http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003940|vmware kb article]]

### Using a New Disk as Local Storage

The appliance is already configured with an FTP server listening on ip address 127.0.0.1 and port 2001.

  * Add a new user with user home directory located on the newly attached disk mounted at _newdisk_

        adduser   -b /newdisk   -s /sbin/nologin localstorage#change the 

        passwd localstorage

  * Set home directory context for ///newdisk/localstorage//

        chcon -R -t user_home_dir_t   /newdisk/localstorage

  * Now you can add the a FTP provider to your NAA Account using the credentials
    - account login:localstorage
    - account password: the password you entered for localstorage user
    - server host:ftp://127.0.0.1
    - server port:2001
    - server home directory:/