Month: January 2023

Ansible Contd Tomcat Playbook optimization Refer Here for the rest of steps added Generally there are some tasks which need to be executed as a reaction to other task i.e. restart tomcat only when configuration files have changed For acheiving the above we need to know about ansible Handlers Refer Here for the changes done… Continue reading DevOps Classroomnotes 08/Jan/2023

AWS Application Migration Applications: This is set of Source Servers Waves: Choose multiple Applications and Source Servers Storage Migration Migrating Data from NFS (Network File Shares) NAS (Network Attached Storage) SAN (Storage Area Networks) Online Migration: This approach is used when you are supposed to sync the data post migration as well and data to… Continue reading AWS Classroomnotes 08/Jan/2023

Azure Migration Contd.. Perform Test Migration, login into vm Complete Test Migration and stop replication Azure Database Migration Service Lets migrate from SQL Server 2017 to Azure SQL Refer Here for the SQL Server setup on the source and Refer Here for the sample database Azure Database Migration supports Assessment for only SQL Servers Migration… Continue reading Azure Classroomnotes 08/Jan/2023

Inventory Ansible allows groups in inventory. Inventory is list of hosts where the playbook has to be executed. Inventory can be written in two formats ini file yaml Ansible inventory ini file format ini file is a text file The inventory can be written as follows all entries directly 172.31.24.180 172.31.24.181 dev.internal.qt.com This falls under… Continue reading DevOps Classroomnotes 07/Jan/2023

AWS Migration Contd Lets launch test instances After testing is success ful create the cutover instances Overall workflow Redo the migration of a simple apache server by linux requirements Refer Here On linux GRUB Bootloading On Windows UEFI Boot

Azure VM Migration Contd After setting up the replication appliance and waiting for initial sync we got the following Lets perform test migration When we did test migration, we migrated for vms with ssh key and we didnot preserve the private key of the source server. To fix this issue, we have generated the new… Continue reading Azure Classroomnotes 07/Jan/2023

AWS Application Migration As of now the agent is stalled, we are restarting post resizing Refer Here for troubleshooting issues After replication is complete launch test instances Wait for the test instance to be launched. To be continued in the next session

Possible fixes When we execute ansible playbook on the node where everything is installed, changes shouldn’t happen. But as of now there are changes during every execution done by ansible Context xml with same contents is created as two files and two times the copy is handled in two tasks Ansible playbook which we have… Continue reading DevOps Classroomnotes 05/Jan/2023

Azure Server Migrate We have installed azure migrationation discovery and assesment agent on the hyperv host Create a global administrator user in Azure Now give permissions at subscription level Give the necessary credentials in the Discover and assement appliance Ideally Discovery should be up for 24 hours before assessment to get accurate assessment reports. We… Continue reading Azure Classroomnotes 05/Jan/2023

AWS Server Migrations Refer Here for the official docs for Server Migration Service AWS now recommends using AWS Application Migration Service AWS Application Migration Service supports migrations from Windows Linux Agentless Migration (For VmWare Vcenter) Agentless Migration Architecture AWS Application Migration Service Lets migrate one ubuntu 20.04 vm into AWS using Application migration service Refer… Continue reading AWS Classroomnotes 04/Jan/2023