Question:- Can you tell me what a Puppet codedir is?
Answer:- It is the main directory for code and data in Puppet. It consists of environments (containing manifests and modules), a global modules directory for all the environments, and your Hiera data.
Question:- Where do you find codedir in Puppet?
Answer:- It is found at one of the following locations: Unix/Linus Systems: /etc/puppetlabs/code Windows: %PROGRAMDATA%PuppetLabscode (usually, C:ProgramDataPuppetLabscode) Non-root users: ~/.puppetlabs/etc/code
Question:- How does Ansible work?
Answer:- Ansible is an open-source automation tool, which is categorized into two types of servers: Controlling machines Nodes Ansible will be installed on the controlling machine, and using that machine nodes are managed with the help of SSH. Nodes’ locations are specified by inventories in that controlling machine. Since Ansible is an agentless tool, it doesn’t require any mandatory installations on remote nodes. So, there is no need of background programs to be executed while it is managing any nodes. Ansible can handle a lot of nodes from a single system over an SSH connection with the help of Ansible Playbooks. Playbooks are capable of performing multiple tasks, and they are in the YAML file format. Are you interested in learning DevOps from experts? Enroll in the DevOps Course in Bangalore provided by Intellipaat!
Question:- Sometimes, we use ad-hoc commands instead of Playbooks in Ansible. Can you tell me what’s the difference between Ansible Playbook and an ad-hoc command? Also, cite when to use them.
Answer:- Ad-hoc commands are used to do something quickly, and they are for, mostly, one-time use. Whereas, Ansible Playbook is used to perform repeated actions. There are scenarios where we want to use ad-hoc commands simply to perform a non-repetitive activity.
Question:- Why should I use Ansible?
Answer:- Ansible can help in: • Configuration Management • Application Deployment • Task Automation
Question:- What are handlers in Ansible?
Answer:- Handlers in Ansible are just like regular tasks inside an Ansible Playbook, but they are only run if the task contains a ‘notify’ directive. Handlers are triggered when it is called by another task.
Question:- Have you heard about Ansible Galaxy? What does it do?
Answer:- Yes, I have. Ansible Galaxy refers to the ‘Galaxy website’ by Ansible, where users share Ansible roles. It is used to install, create, and manage Ansible roles.
Question:- Can you write the syntax for building a docker image?
Answer:- To build a docker image, we use the following command: docker build –f -t image_name:version
Question:- What is the concept of sudo in Linux?
Answer:- Sudo is a program for Unix/Linux-based systems that provides the ability to allow specific users to use specific system commands in the system’s root level. It is an abbreviation of ‘superuser do’, where ‘super user’ means the ‘root user’.
Question:- Can you tell me the purpose of SSH?
Answer:- SSH is nothing but a secure shell that allows users to login with a secure and encrypted mechanism into remote computers. It is used for encrypted communications between two hosts on an unsafe network. It supports tunneling, forwarding TCP, and also transferring files.
Question:- What is NRPE in Nagios?
Answer:- NRPE stands for ‘Nagios Remote Plugin Executor’. As the name suggests, it allows you to execute Nagios plugins remotely on other Linux or Unix machines. It can be helpful in monitoring remote machine performance metrics such as disk usage, CPU load, etc. It can communicate with some of the Windows agent addons. We can execute scripts and check metrics on remote Windows machines as well.
Question:- Can you tell me why I should use Nagios?
Answer:- • To plan for infrastructure upgrades before the outdated systems fail • To respond to issues quickly • To fix problems automatically when detected • To coordinate with the responses from the technical team • To ensure that the organization’s service-level agreements with the clients are being met • To make sure that the IT infrastructure outages have only a minimal effect on the organization’s net income • To monitor the entire infrastructure and business processes
Question:- What is Nagios Log Server?
Answer:- Nagios Log Server simplifies the process of searching the log data. Nagios Log Server is the best choice to perform tasks such as setting up alerts, notifying when potential threats arise, simply querying the log data, and quickly auditing any system. With Nagios Log Server, we can get all of our log data in one location with high availability.
Question:- Can you tell me why I should use Nagios for HTTP monitoring?
Answer:- Nagios can provide us the complete monitoring service for our HTTP servers and protocols. Here are a few benefits of implementing effective HTTP monitoring with Nagios: • Server, services, and application availability can be increased. • Network outages and protocol failures can be detected quickly. • User experience can be monitored. • Web server performance can be monitored. • Web transactions can be monitored. • URLs can be monitored.