A Technical I.T./DevOps Blog
Problem scenario
You want to monitor Docker containers. Therefore you want to install Sysdig to try it out. How do you pull down a Docker container that has Sysdig installed in it?
Solution
Prerequisites
Docker needs to be installed. If you need to install Docker on a CentOS/RedHat/Fedora distribution, see this posting. If you need to install Docker on a Debian/Ubuntu,
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Continue reading “How Do You Install Sysdig in a New Docker Container to Try It Out?”
Problem scenario
The web UI for Zabbix shows the Zabbix server is not running. In “Status of Zabbix” there is a parameter “Zabbix server is running” and it has a value of “No.” To investigate on the back-end of the Zabbix server you run this command: tail -f /var/log/zabbix/zabbix_server.log
You see this error: “Access denied for user ‘zabbix’@’localhost’ (using password: YES)”
What should you do?
Solution
Examine the zabbix_server.conf file.
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Problem scenarios
One, or both, of the following apply to your situation:
Problem scenario #1
How do you use AWS (the SNS component) to set up an email alert to be notified of a server going down?
Problem scenario #2
You want to use Amazon Route 53 to see how this component works. You do not want to register a domain name.
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Question
Will current trends in DevOps and automation affect the role SDETs play?
Answer
If you want a definition of an SDET (and its etymology), see this posting. (As of 9/2/19, Wikipedia has no definition of the job title SDET.) If you Google the phrase “devops venn diagram” for images you will not see pictures of merely two overlapping circles with one circle representing “development” and another representing “operations.” You will see DevOps in the middle of an intersection of three circles — one of the circles is also QA!
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Continue reading “How Will Trends in DevOps and Automation Affect SDETs?”
Problem scenario
You are running Ubuntu Linux in AWS. You want to monitor it with your Zabbix server. (To set up a Zabbix server in AWS, see this posting.) How do you install the Zabbix client on an Ubuntu server?
Solution
Section 1
Make sure your AWS Security group allows for inbound connections from the internal IP address of the Zabbix server on any TCP port.
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Continue reading “How Do You Install the Zabbix Client on an Ubuntu AWS Instance?”
Problem scenario
You have a RedHat Linux server with only 1 vCPU and 1 GB of RAM. You want to install Zabbix Server to monitor other servers. How do you deploy Zabbix server to an AWS instance of RHEL?
Solution
1. Install the LAMP stack components by running this command:
sudo yum -y install php httpd mariadb-server
2. Install essential Zabbix components with these four commands:
sudo rpm –import http://repo.zabbix.com/RPM-GPG-KEY-ZABBIX
sudo rpm -Uv
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Continue reading “How Do You Install Zabbix Server on RHEL 7.x Running in AWS?”
Problem scenario
You have set up Zabbix server (i.e., using these directions). How do you configure another RedHat Linux server in AWS to be configured with the client so the Zabbix will monitor it?
Solution
Section 1
1. Make sure your AWS Security group (that governs this AWS instance that will be a client) allows for inbound connections from the internal IP address of the Zabbix server on any TCP port.
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Continue reading “How Do You Install the Zabbix Client on a RHEL 7.x Server in AWS?”
Problem scenario
You have Nagios core installed on a server in AWS. You want a new AWS RedHat Enterprise Linux server to have the NRPE agent. You want thorough directions for this process to potentially automate it. How do you install and configure the NRPE agent on a RHEL server and configure a Nagios core server to monitor it?
Solution
Prerequisites
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Problem scenario
You have a small AWS server (e.g., t2.micro with 1 GB of RAM) running RedHat Enterprise Linux. How do you install Nagios on it? You want thorough directions to install and configure the Nagios monitoring server on RHEL.
Solution
As root or a sudoer user, run a script with the following content:
# Written by continualintegration.com
# This script installs Nagios.
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Continue reading “How Do You Install Nagios on RedHat Linux Step-By-Step?”
Problem scenario
You want the Nagios Core server to monitor another AWS server. How do you install and configure the NRPE agent on Ubuntu?
Solution
Follow these step-by-step directions if you are using AWS. If the servers are not in AWS, the directions below may still work. These directions assume that the Nagios core server is running on Ubuntu in AWS. (If you want to know how to set up Nagios core on Ubuntu,
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Continue reading “How Do You Install and Configure the NRPE Agent on Ubuntu?”