Welcome to docs.opsview.com

Installation Guide - Debian Linux

Before you start

  • For supported Debian releases please refer to platforms.
  • When planning your system please see our design notes for further information on planning for separate database servers, disk partitioning and security.

Preparation

Prerequisites

See the installation prerequisites information to setup users, groups and MySQL.

Importing Repository Signatures

For security, this repository is gpg signed. Follow our instructions to add the key to your server.

If you do not import our gpg keys, you could see errors such as:

W: GPG error: https://downloads.opsview.com squeeze Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FB4C675977CB2CF6

The “NO_PUBKEY” portion of this message indicates that your system does not have the public key for this repository and so cannot verify its contents. You can ignore these warnings and import the keys later.

You could also see:

WARNING: The following packages cannot be authenticated!
  opsview-perl opsview-base libapache2-mod-auth-tkt-prefork-opsview opsview-core opsview-web opsview
Install these packages without verification [y/N]?

You can continue, though we recommend you verify the packages.

Opsview repositories

To install Opsview, use your favourite editor to edit the file /etc/apt/sources.list (or create a new file /etc/apt/sources.list.d/opsview.list) and add the following line to it:

# Opsview packages
deb http://downloads.opsview.com/opsview-core/latest/apt <OS> main

Where:

  • OS is your distribution name, such as etch or lenny

For example:

deb http://downloads.opsview.com/opsview-core/latest/apt lenny main

Updating the Package Lists

When configuration is complete, update the repository information:

apt-get update

Installation

Once the sources list has been updated to include the Opsview apt repository, the latest release of Opsview can be installed by running the following command as root.

apt-get install opsview

You may get prompted for the mysql root user password. This is required to setup the databases used by Opsview.

The Opsview Web server is now listening on port 3000, i.e. http://opsview.example.com:3000/.

To secure your instance of Opsview Web, you should change the authtkt secret to be unique to this instance. In /usr/local/nagios/etc/opsview.conf, add the following and change the secret value to be a unique string:

$authtkt_shared_secret = "shared-secret-please-change";

Restart Opsview Web for this value to take effect: /etc/init.d/opsview-web restart.

Using Apache as a proxy server

The performance of Opsview will be significantly improved by using Apache at the front end. All the following commands should be run as root.

Firstly, copy the Apache configuration file into the appropriate location:

cp /usr/local/nagios/installer/apache_proxy.conf /etc/apache2/sites-available/opsview
a2ensite opsview
a2dissite default

Then, edit the Apache configuration file so that the same shared secret is used:

TKTAuthSecret "shared-secret-please-change"

You will also need to install the Apache proxy_html module in order to use this configuration. On Debian, you can install the libapache2-mod-proxy-html package:

apt-get install libapache2-mod-proxy-html
a2enmod proxy_http

Now Apache can be restarted

/etc/init.d/apache2 force-reload

You can now access Opsview at http://opsview.example.com/

Logging in

Once Opsview has been installed, a single administrative user will have been created. The credentials for this user are:

username: admin
password: initial

You should change this password to prevent unauthorised access to Opsview - this can be done from the Administrator link at the top right of the page.

Check out our quick start guide to help you get familiar with Opsview.

Upgrading Opsview

Opsview can be upgraded by running the following command as root:

apt-get install opsview

See the upgrade notes before doing any upgrades.

Troubleshooting

SNMP MIBs Missing

On Debian squeeze, SNMP MIBs are not installed by default.

You will need to install the SNMP MIBs manually with:

apt-get install snmp-mibs-downloader

See http://wiki.debian.org/SNMP for more information.

Note, you may still get some MIB reading errors, for example:

$ snmpwalk -mALL -v2c -cpublic host | head
Unlinked OID in IPATM-IPMC-MIB: marsMIB ::= { mib-2 57 }
Undefined identifier: mib-2 near line 18 of /usr/share/mibs/ietf/IPATM-IPMC-MIB
Bad operator (INTEGER): At line 73 in /usr/share/mibs/ietf/SNMPv2-PDU
Undefined OBJECT-GROUP (diffServMIBMultiFieldClfrGroup): At line 2195 in /usr/share/mibs/ietf/IPSEC-SPD-MIB
Undefined OBJECT-GROUP (diffServMultiFieldClfrNextFree): At line 2157 in /usr/share/mibs/ietf/IPSEC-SPD-MIB
Undefined OBJECT-GROUP (diffServMIBMultiFieldClfrGroup): At line 2062 in /usr/share/mibs/ietf/IPSEC-SPD-MIB
Expected "::=" (RFC5644): At line 493 in /usr/share/mibs/iana/IANA-IPPM-METRICS-REGISTRY-MIB
Expected "{" (EOF): At line 651 in /usr/share/mibs/iana/IANA-IPPM-METRICS-REGISTRY-MIB
Bad object identifier: At line 651 in /usr/share/mibs/iana/IANA-IPPM-METRICS-REGISTRY-MIB
Bad parse of OBJECT-IDENTITY: At line 651 in /usr/share/mibs/iana/IANA-IPPM-METRICS-REGISTRY-MIB
RFC1213-MIB::sysDescr.0 = STRING: "Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-J1S3-M), Version 12.2(15)T7,  RELEASE SOFTWARE (fc2)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Sat 09-Aug-03 07:18 by ccai"
RFC1213-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.9.1.186
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (813825536) 94 days, 4:37:35.36
RFC1213-MIB::sysContact.0 = STRING: "support@opsera.com"
RFC1213-MIB::sysName.0 = STRING: "2611"
RFC1213-MIB::sysLocation.0 = STRING: "Reading"

MRTG Emails Due to Permissions

NOTE: there maybe a bug in the mrtg package which may cause a warning email to be sent to the system administrator every 5 minutes. This can be fixed by running:

sudo mkdir /var/www/mrtg

See this bug report and also this one for more information

MRTG Warning Email

Subroutine SNMP_Session::sockaddr_in6 redefined at /usr/share/perl/5.14/Exporter.pm line 67. at /usr/share/perl5/SNMP_Session.pm line 149
Subroutine SNMPv1_Session::pack_sockaddr_in6 redefined at /usr/share/perl/5.14/Exporter.pm line 67. at /usr/share/perl5/SNMP_Session.pm line 608

If the system administrator receives an email containing messages similar to the ones above, the cause is the system MRTG having an issue with the system SNMP_Session. This is not an Opsview problem as such, but can be rectified by replacing all “import Socket6;” lines in /usr/share/perl5/SNMP_Session.pm with “Socket6->import(qw(inet_pton getaddrinfo));”. We've only seen this on Debian 7 systems.

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