Your public key has been saved in /root/.ssh/id_rsa.pub. Your identification has been saved in /root/.ssh/id_rsa. # ssh-keygenĮnter file in which to save the key (/root/.ssh/id_rsa):Įnter passphrase (empty for no passphrase): Generate a SSH Key on server using ssh-keygen command. Repeat the above command on lightttpd-01 and mariadb-01 machines.Ĭonfigure SSH for key-based authentication on CentOS 7: Otherwise, you have to add the name resolution entries in Local DNS Resolver (/etc/hosts) file. If you have configured a Authoritative DNS Server for you domain, then you can add the RR (Resource Records) of all three servers in it. Here, we will install Ansible on and configure the other two servers as Ansible managed nodes.Ĭonfigure Name Resolution of Linux Servers: We are using three CentOS 7 virtual machines with following specifications. Using Ansible Playbooks to configure CentOS 7 nodes.Configure Ansible Managed Nodes in Adhoc mode.Configure SSH for key-based authentication on CentOS 7.Configure Name Resolution of Linux Servers.In this article, we are installing Ansible on CentOS 7 and then write and execute Ansible playbooks to configure our Linux servers using Ansible. RHCE (Red Hat Certified Engineer) specific to Red Hat Enterprise Linux 8. One major shift is the inclusion of Ansible by Red Hat in Industry’s most reputable certification i.e. But it is getting famous and converting the users from competitors’ technologies. We just need to configure the key-based ssh authentication on the nodes and Ansible will then uses the ssh to perform configurations on the nodes.Īs compare to Puppet and Chef Ansible is a new candidate in the domain of configuration management. And because of this agent-less architecture, installation and configuration of Ansible is very easy and straight-forward. The main functionality that differs Ansible from other configuration management software is it's agent-less architecture. Ansible uses its own declarative language, based on YAML (Yet Another Markup Language), to describe system configurations. We have successfully installed Apache Tomcat using Ansible playbook on ubuntu, Kindly report in case you are facing defeculties with follwing details.Ansible is an open-source software provisioning, configuration management, and application-deployment tool. ansible-playbook tomcat-playbook.yml Conclusion Now we are ready to use the tomcat’s PlayBook, To execute the PlayBook you need to use the given command. name: Creating service for Apache tomcat. Shell: tar -xzvf /tmp/apache-tomcat-8*tar.gz -C /opt/tomcat -strip-components=1 name: Creating Apache Tomcat home directory. Shell: groupadd tomcat & useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat name: Adding Group and user for Tomcat. You need to create a tomcat-playbook.yml and you change it according to your requirement. Here our host configuration is completed and now we can go for next step to write play book. Localhost ansible_connection=ssh ansible_ssh_user=ubuntu ansible_ssh_pass=xxxxxxxĬhange the credentials as per your environment, Save and exit from the vim text editor and verify the host machine connectivity with ansible by using the given command. sudo vim /etc/ansible/hostsĪnd add the web server entry like this. You need to add your server in ansible host file, Syntax is given below, You need to open the /etc/ansible/hosts file with nano or vim text editor. We believe, You have already installed Ansible if not you need to click on given link to install Ansible on ubuntu server.īy default ansible host configuration file is /etc/ansible/hosts Here you need to add the tomcat server details like this, Use the following step for the same, In my case i have 1 apache tomcat server. Some time we need to automate the packages installation on multiple server, Here we are about to create Ansible Playbook to install Apache Tomcat server.
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