No output from SNMP

Discussion in 'Install/Configuration' started by garnser, Mar 1, 2010.

  1. garnser

    garnser New Member

    Hi all,

    I recently tried getting SNMP working with my Litespeed server but for some reason no data is presented when quering it with SNMP.

    I followed this guide:
    http://www.litespeedtech.com/support/wiki/doku.php?id=litespeed_wiki:snmp_cacti_monitoring

    Code:
    # apt-get install php5-cli php5-common php5-snmp 
    Added the following to /etc/snmp/snmpd.conf (There's preexisting configuration for other MIBs which works)
    Code:
    pass .1.3.6.1.4.1.22253 /usr/bin/php /usr/local/lsws/add-ons/snmp_monitoring/sample.php
    Running it locally returns:
    Code:
    # php -q ./sample.php -n .1.3.6.1.4.1.22253.101
    .1.3.6.1.4.1.22253.101.1
    string
    LiteSpeed Web Server
    The SNMP log only shows that a SNMP query has been requested but not output was provided.

    Please advice.
  2. mistwang

    mistwang LiteSpeed Staff

    Maybe it is because snmp agent call an external application to serve the request.
    You got the result from sample.php, right? it is working.
  3. garnser

    garnser New Member

    Wouldn't the log return some kinds of errors if that was the case?
  4. mistwang

    mistwang LiteSpeed Staff

    I think it is just the way it works.
    You should ask net-snmp developers about this, it is not something develop by LiteSpeed.
  5. garnser

    garnser New Member

    Quering the script with extend rather than pass gave this output:
    SNMPv2-SMI::enterprises.22253.1.0 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "/usr/local/lsws/add-ons/snmp_monitoring/sample.php"
    SNMPv2-SMI::enterprises.22253.2.1.3.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.4.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.5.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 5
    SNMPv2-SMI::enterprises.22253.2.1.6.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.7.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.20.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 4
    SNMPv2-SMI::enterprises.22253.2.1.21.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.1.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "/usr/local/lsws/add-ons/snmp_monitoring/sample.php: Permission denied"
    SNMPv2-SMI::enterprises.22253.3.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "/usr/local/lsws/add-ons/snmp_monitoring/sample.php: Permission denied"
    SNMPv2-SMI::enterprises.22253.3.1.3.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.4.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.4.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112.1 = STRING: "/usr/local/lsws/add-ons/snmp_monitoring/sample.php: Permission denied"

    Gives you a bit more to work on.
  6. mistwang

    mistwang LiteSpeed Staff

    chmod a+x /usr/local/lsws/add-ons/snmp_monitoring/sample.php

    add
    #!/usr/local/bin/php

    at the beginning of sample.php if it is not there.
  7. garnser

    garnser New Member

    Ok getting a bit closer however I'm still not getting the full output:

    root@mon:~# snmpwalk -c public -v 1 10.254.11.101 .1.3.6.1.4.1.22253
    SNMPv2-SMI::enterprises.22253.1.0 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "/var/lib/snmp/snmp_monitoring/sample.php"
    SNMPv2-SMI::enterprises.22253.2.1.3.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.4.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.5.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 5
    SNMPv2-SMI::enterprises.22253.2.1.6.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.7.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.20.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 4
    SNMPv2-SMI::enterprises.22253.2.1.21.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.1.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.3.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.3.1.3.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.4.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 0
    SNMPv2-SMI::enterprises.22253.4.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112.1 = ""
  8. mistwang

    mistwang LiteSpeed Staff

    Maybe you need to use

    #!/usr/local/bin/php -q

    to silence PHP header output.
  9. garnser

    garnser New Member

    Hm, did seam to help, however as the file is executeble I configured snmpd to query the script directly instead extend .1.3.6.1.4.1.22253 /var/lib/snmp/snmp_monitoring/sample.php

    Which gives me this:
    root@mon:~# snmpwalk -c public -v 1 10.254.11.101 .1.3.6.1.4.1.22253
    SNMPv2-SMI::enterprises.22253.1.0 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.2.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = STRING: "
    "
    SNMPv2-SMI::enterprises.22253.2.1.3.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.4.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.5.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 5
    SNMPv2-SMI::enterprises.22253.2.1.6.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.7.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.20.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 4
    SNMPv2-SMI::enterprises.22253.2.1.21.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.1.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = STRING: "No such file or directory"
    SNMPv2-SMI::enterprises.22253.3.1.2.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = STRING: "No such file or directory"
    SNMPv2-SMI::enterprises.22253.3.1.3.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.4.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.4.1.2.40.47.118.97.114.47.108.105.98.47.115.110.109.112.47.115.110.109.112.95.109.111.110.105.116.111.114.105.110.103.47.115.97.109.112.108.101.46.112.104.112.1 = STRING: "No such file or directory"

    Any idea what file that could be missing?
  10. mistwang

    mistwang LiteSpeed Staff

    Maybe you should use
    remove "#!/usr/bin/php -q" from sample.php
  11. garnser

    garnser New Member

    Back on square one using pass, with extend I get:

    root@mon:~# snmpwalk -c public -v 1 10.254.11.101 .1.3.6.1.4.1.22253
    SNMPv2-SMI::enterprises.22253.1.0 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "-q"
    SNMPv2-SMI::enterprises.22253.2.1.3.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "/var/lib/snmp/snmp_monitoring/sample.php"
    SNMPv2-SMI::enterprises.22253.2.1.4.12.47.117.115.114.47.98.105.110.47.112.104.112 = ""
    SNMPv2-SMI::enterprises.22253.2.1.5.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 5
    SNMPv2-SMI::enterprises.22253.2.1.6.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.7.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.2.1.20.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 4
    SNMPv2-SMI::enterprises.22253.2.1.21.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.1.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "-q: No such file or directory"
    SNMPv2-SMI::enterprises.22253.3.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112 = STRING: "-q: No such file or directory"
    SNMPv2-SMI::enterprises.22253.3.1.3.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.3.1.4.12.47.117.115.114.47.98.105.110.47.112.104.112 = INTEGER: 1
    SNMPv2-SMI::enterprises.22253.4.1.2.12.47.117.115.114.47.98.105.110.47.112.104.112.1 = STRING: "-q: No such file or directory"
  12. mistwang

    mistwang LiteSpeed Staff

    try quoting "/usr/bin/php -q"

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