From 8081a5520a441b43a8a7a73f3a90c7aacfaa8e10 Mon Sep 17 00:00:00 2001 From: Timotej Lazar Date: Sun, 24 Feb 2019 21:05:27 +0100 Subject: Move everything one level up --- tasks/snmp_agent_uptime/howtos/en/index.html | 319 +++++++++++++++++++++++++++ 1 file changed, 319 insertions(+) create mode 100644 tasks/snmp_agent_uptime/howtos/en/index.html (limited to 'tasks/snmp_agent_uptime/howtos/en') diff --git a/tasks/snmp_agent_uptime/howtos/en/index.html b/tasks/snmp_agent_uptime/howtos/en/index.html new file mode 100644 index 0000000..bef6792 --- /dev/null +++ b/tasks/snmp_agent_uptime/howtos/en/index.html @@ -0,0 +1,319 @@ + + + + snmp_agent_uptime + + +

snmp_agent_uptime

+

Quick instructions

+

+ Set up three virtual computers, SimpleArbiter with the disk image + simpleArbiterDhcp, SNMPServer and SNMPClient. Write a program + called upminutes. This program should output the uptime of the + computer in minutes. Set it up on SNMPClient in the home directory + of the user test with the password test. +

+

+ Make sure that the SNMP server reports it's uptime in seconds + over SNMP under NET-SNMP-EXTEND-MIB::nsExtendOutput2Table. +

+

+ Write a script called beri.sh that reads the value from the + OID 1.3.6.1.4.1.8072.1.3.2.4.1.2 on SNMPServer. Set it up on + SNMPClient in the home directory of the user test. +

+

Instructions

+

Set up of VM VirtualBox

+
    +
  1. + Download the following virtual images (*.vid) from the directory + with images of virtual computers: +
      +
    1. + simpleArbiterDhcp.vdi +
      2. +
    2. + some-bash-console.vdi – twice, one for SNMPServer + and second for SNMPClient +
      3. +
    +
    2. +
  2. + VM VirtualBox WARNING! If you want to use one same virtual image + (some-bash-console.vdi) for two virtual computers + (SNMPServer and SNMPClient), you must change UUID + of one image. +
      +
    1. + Use this command + vboxmanage internalcommands sethduuid name-of-disk.vdi + to change UUID (hint). +
      2. +
    +
    3. +
  3. + Final view of sets VM VirtualBox machines.
    + VM VirtualBox machines +
    4. +
+ +

Set up of SNMPServer machine

+
    +
  1. + setup network as “Bridged Adapter” -> Machine-> Settings ->Network + + Install snmpd and snmp packages and tools for inspecting the + data available over SNMP. +
      +
    1. + command apt-get install snmpd snmp snmp-mibs-downloader +
      2. +
    +
  2. + RECOMMENDATION! Before doing any changes to your /etc/snmp/snmpd.conf + file take a copy of original file. +
      +
    1. + command cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.orig +
      2. +
    +
    3. +
  3. + Set up the snmp server to allow all other computers to access it = edit + snmpd.conf file. +
      +
    1. + command nano /etc/snmp/snmpd.conf + (you can use different editor) +
      2. +
    2. + Check this 4 rows and make sure they look like this:
      + # Listen for connections from the local system only
      + # agentAddress udp:127.0.0.1:161
      + # Listen for connections on all interfaces (both IPv4 *and* IPv6)
      + agentAddress udp:161,udp6:[::1]:161       +
      3. +
    +
    4. +
  4. + Add a group (community) of computers we deem to be worthy of + accessing all data. This group will be called students = again edit + snmpd.conf file. +
      +
    1. + rocommunity students 0.0.0.0/0 +
      2. +
    2. + change 0.0.0.0./0 into correct address ifconfig -a +
      3. +
    +
    5. +
  5. + OPTIONAL CONFIGURATION. Lower in the same file you can set the + location of the computer snmpd is running on and the name + of the administrator. +
      +
    1. + find under # SYSTEM INFORMATION +
      2. +
    +
    6. +
  6. + Make sure that the SNMP server reports it's uptime in seconds + over SNMP under NET-SNMP-EXTEND-MIB::nsExtendOutput2Table. +
      +
    1. + create script upseconds containing this and save it where + you want:
      + #!/bin/bash
      + uptime=$(</proc/uptime)
      + seconds=${uptime%%.*}
      + echo "Uptime in seconds:" $seconds
      + exit 0       +
      2. +
    2. + don't forget to make the script runnable:
      + command chmod +x /your_path_to_script/upseconds +
      3. +
    3. + Then edit file snmpd.conf and under # EXTENDING THE AGENT + comment all three tests and add your line of your code + with upsecond script. It will look like this:
      + # extend test1 /bin/echo Hello, world!
      + # extend-sh test2 echo Hello, world! ; echo Hi there ; exit 35
      + # extend-sh test3 /bin/sh /tmp/shtest
      + extend-sh "your_name" "your_path_to_script_upseconds" +       +
      4. +
    +
    7. +
  7. + You need to restart the snmp services. +
      +
    1. + command /etc/init.d/snmpd restart +
      2. +
    +
    8. +
  8. + You can test your configuration through localhost. +
      +
    1. + command snmpwalk localhost -c public -v1 +
      2. +
    +
    9. +
  9. + Also test the correct return of server's uptime in seconds SNMP under + NET-SNMP-EXTEND-MIB::nsExtendOutput2Table. +
      +
    1. + command snmpwalk -c students -v1 IPaddressOfServer + 1.3.6.1.4.1.8072.1.3.2.4.1.2 +
      2. +
    2. + you should get string: "Uptime in seconds: xyz" +
      3. +
    +
    10. +
+ +

Set up of SNMPClient machine

+
    +
  1. + Install snmpd and snmp packages. +
      +
    1. + command apt-get install snmpd snmp +
      2. +
    +
  2. + RECOMMENDATION! Before doing any changes to your /etc/snmp/snmpd.conf + file take a copy of original file. +
      +
    1. + command cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.orig +
      2. +
    +
    3. +
  3. + Set up the snmp client to allow all other computers to access it = edit + snmpd.conf file. +
      +
    1. + command nano /etc/snmp/snmpd.conf + (you can use different editor) +
      2. +
    2. + (un)comment these four lines as below:
      + # Listen for connections from the local system only
      + # agentAddress udp:127.0.0.1:161
      + # Listen for connections on all interfaces (both IPv4 *and* IPv6)
      + agentAddress udp:161,udp6:[::1]:161       +
      3. +
    +
    4. +
  4. + Add a group (community) of computers we deem to be worthy of + accessing all data. This group will be called students = again edit + snmpd.conf file. +
      +
    1. + rocommunity students 0.0.0.0/0 +
      2. +
    2. + write correct network address = command ifconfig -a +
      3. +
    +
    5. +
  5. + OPTIONAL CONFIGURATION. Lower in the same file you can set the + location of the computer snmpd is running on and the name + of the administrator. +
      +
    1. + find under # SYSTEM INFORMATION +
      2. +
    +
    6. + +
  6. + You need to restart the snmp services. +
      +
    1. + command /etc/init.d/snmpd restart +
      2. +
    +
    7. +
  7. + You can test your configuration through localhost. +
      +
    1. + command snmpwalk localhost -c public -v1 +
      2. +
    +
    8. +
  8. Create the user test with password test +
      +
    1. + command adduser test +
      2. +
    +
    9. +
  9. Login as user test and create program upminutes + in the home directory. This program should output the uptime of the + computer in minutes. +
      +
    1. + command nano upminutes (you can use different editor) +
      2. +
    2. + add the source code:
      + #!/bin/bash
      + uptime=$(</proc/uptime)
      + uptime=${uptime%%.*}
      + minutes=$(( uptime / 60 ))
      + echo $minutes
      + exit 0       +
      3. +
    3. + don't forget to make the program runnable:
      + command chmod +x /home/test/upminutes +
      4. +
    4. + test the program (it should output the uptime of the + computer in minutes)
      + command /home/test/upminutes +
      5. +
    +
    10. +
  10. As user test and create next script called + beri.sh that reads the value from the OID + 1.3.6.1.4.1.8072.1.3.2.4.1.2. on SNMPServer. Set it up on SNMPClient + in the home directory of the user test. +
      +
    1. + command nano beri.sh (you can use different editor) +
      2. +
    2. + add the source code:
      + #!/bin/bash
      + snmpwalk -c students -v1 IPServerAddress 1.3.6.1.4.1.8072.1.3.2.4.1.2
      + exit 0       +
      3. +
    3. + don't forget to make the program runnable:
      + command chmod +x /home/test/upminutes + you can test it with ./beri.sh +
      4. +
    +
    11. +
+ +

Setting SimpleArbiter

+ User: tester + Password: test + + apt-get install libsnmp-python + + -- cgit v1.2.1