JordansphereLinux
Upgrade Zabbix from 3.4 to 4.0 with Pacemaker/Corosync
Here are the instructions for upgrading Zabbix from 3.4 to 4.0 in a HA setup in a Pacemaker and Corosync environment. In this particular setup there are 6 servers – depicted below Two web front ends Two Zabbix Servers Two DB servers Steps Pre-requisite: As this was running in a VMware environment I snapshotted each […]
UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY
Problem A CentOS VM was rebooted but failed to start with the following error: /dev/ampper/VolGroup-lv_root: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY Solution 1) Enter CLI {Enter root password} 2) Run filesystem check . In my case. # fsck -y /dev/ampper/VolGroup-lv_root 3 Reboot system # reboot
Backup Postgres DB and Rotate using Logrotate – CentOS
Here is a rudimentary script to backup a specific Postgres DB. Logrotate then takes care of the log rotation. As you'll see below we will keep 7 days worth of compressed files. #! /bin/bash # This script is called from logrotate /etc/logrotate.d/my-dumps # It backs up myDB every evening and logrotate takes care of compression […]
Install NRPE on CentOS 7
1) Install required packages yum -y install wget openssl-devel 2) Download latest NRPE agent cd /tmp wget http://assets.nagios.com/downloads/nagiosxi/agents/linux-nrpe-agent.tar.gz 3) Unzip NRPEagent tar xzf linux-nrpe-agent.tar.gz 4) Install agent cd linux-nrpe-agent ./fullinstall You will get asked which hosts to add. include your Nagios Server here In this case my Nagios server is 10.0.0.50 6) […]
Install Postgres 10 for vCloud Director 9.5
Here are the steps to install Postgres 10 on CentOS 7 Spec: OS: CentOS 7 DB: Postgres 10.x RAM: 16GB vCPU: 4 HDD: 100 GB OS Installation: Use Guided GUI installation. Select to partition manually so that all data is on /root LVM. […]
Install RabbitMQ for vCloud Director 9
Here are the step-by-step instructions to install RabbitMQ. This install will be used for a vCloud Director 9.1 installation. Desired versions: Rabbit MQ : 3.7.7 Erlang: 20.1.7.1 (>19.3 is required for Rabbit MQ 3.7.7) 1. Install EPEL yum -y install epel-release 2. Create Erlang Repo vi /etc/yum.repos.d/rabbitmq-erlang.repo Inset this […]
How to Setup NTP on CentOS 7
This is a quick start guide to set up NTP on Centos 7 1. Install NTP service yum install ntp 2. Start service systemctl start ntpd 3. Enable service systemctl enable ntpd 4. Edit NTP configuration vi /etc/ntp.conf Edit values for "server" eg # Use public servers from the pool.ntp.org project. # […]
Installing Puppet Agent on Ubuntu 16.04
Problem: When trying to install the puppet agent on an Ubuntu 16.04 server the following error appeared Command: ​curl -k https://puppet:8140/packages/current/install.bash | sudo bash % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 25756 100 25756 0 0 162k 0 –:–:– –:–:– –:–:– 163k […]
Zabbix Graphs Showing Incorrect Time
Problem: After a new installation of Zabbix (appliance) 3.4.6 the time on the graphs were 2 hours ahead. The clock on the server was correct. Solution Edit Zabbix configuration file vi /etc/apache2/conf-enabled/zabbix.conf It appeared the timezone in the Zabbix settings is set to Europe/Riga Change php_value date.timezone Europe/Riga to you actual timezone for […]
Install Zabbix Agent on CentOS
The following describes how to install Zabbix agent 3.4.6 onto CentOS 6.9 1) Add Zabbix Repository rpm -ivh http://repo.zabbix.com/zabbix/3.4/rhel/6/x86_64/zabbix-release-3.4-1.el6.noarch.rpm 2) Install Zabbix yum install -y zabbix-agent 3) . Edit zabbix_agentd.conf vi /etc/zabbix/zabbix_agentd.conf Server={Zabbix_Monitoring_server} Hostname={your_server_name} 4) Start Zabbix agent service service zabbix-agent start 5) Add Zabbix Agent service to start up scripts […]