Month: January 2023

parallelism in ansible Ansible forks: This represents the number of hosts in which ansible will parallely execute the playbook The default number of forks are 5, This value can be changed while executing ansible command or in the configuration file. Refer Here for the setting number of forks If you want to run the whole… Continue reading DevOps Classroomnotes 28/Jan/2023

Networking Lets try to understand home network with internet access * Every device connected to the network gets an unique ip address * IP Address: * unique number to identify a device on the network * Network interface: * This device enables network connectivity to the system * The number of network interfaces can be… Continue reading AWS Classroomnotes 28/Jan/2023

Story of Build/Releases Architecture of payroll application For developing this application we have following teams Payroll dev team LeaveMgmt dev team Browser UI team App UI team Duration: 1 year Clients: coca cola Amul Approach 1 (Big Bang integration): Each team will start devloping the components independently This has 4 teams working independently for 9… Continue reading DevOps Classroomnotes 28/Jan/2023

Networking Physical Network: We use cables/medium to connect systems. Virtual Network: This is software defined network used to connect virtual machines Ip address: A unique number used to identify a system in a network Network interface connects system to network and gets an ip address IP Address Execute ipconfig ip address : 192.168.0.11 subnet mask… Continue reading Azure Classroomnotes 28/Jan/2023

Ansible roles Lets create a role for tomcat playbook. Refer Here for the changes done to refactor the tomcat playbook into a role. In roles main.yml is the default file that gets called, from there we can call many other yaml files using include_tasks Refer Here Refer Here for sample Ideal usage of role —… Continue reading DevOps Classroomnotes 26/Jan/2023

Ansible roles Lets try to create a simple ansible playbook Refer Here for the playbook that can be used to install utilities Refer Here for the playbook to install java Refer Here for the basic structure of ansible role Refer Here for using the roles

Azure Recovery In the last session we had setup replication for a VM and the synchronization was in progress. Lets perform test failover As test failover seems to be working lets clean test failover Once the cleanup is complete, whenever in need we can do failover.

AWS Operations Status Checks of EC2 Launch an EC2 instance and verify the status System Status checks are reported if there are issues with power, network etc in AWS AZ’s Instance status checks are reported if the ec2 instance is unable to boot. Generally the issues will be resolved by reboot If the instance status… Continue reading AWS Classroomnotes 23/Jan/2023

Ansible Roles Ansible Roles help in creating re-usable ansible assets. Ansible has huge collection of community roles developed and hosted in Ansible Galaxy Refer Here We can create our own custom ansible roles. using existing Ansible role from Ansible Galaxy Lets use a role to install mysql Refer Here Refer Here for the usage of… Continue reading DevOps Classroomnotes 23/Jan/2023

Enabling Disaster Recovery for Azure Vms using Azure Site Recovery Enabling replication of vms The vm replication can be set up for Azure VMS On-premises Once the replication is complete we can perform Test failover Cleanup test failover failover Initial synchronization will sync the disk contents Once the initial synchronization is complete we can perform,… Continue reading Azure Classroomnotes 23/Jan/2023