Software apps are made up of a number of components (servers, OS, databases, network config, app dependencies etc). If those components are configured differently in different environments then a minor change can easily lead to a failure. Configuration management is all about keeping the config the same across environments, tracking what has been changed and reducing the amount of manual work. A DevOps course in Kanchipuram would be of huge benefit to a beginner in terms of understanding how configuration management helps to deliver stable apps and makes the infrastructure much easier to manage.

Maintain Consistency Across Environments

Dev, test, staging and production environments will often need to be configured in a very similar way in order for the application to behave as expected. When you're doing it all manually there's a tendency for things to differ between environments in terms of software versions, permissions and so on. An app may work perfectly in tests and then simply fail in production as a result. Configuration management provides a way of structuring the way that configurations are defined and applied. You can define your required configuration and then re-use it as and when you create new environments. This leads to fewer avoidable errors and more predictable results when you go to deploy.

Reduce Manual Configuration Errors

Manual config becomes a nightmare to manage when you've got a large number of servers, cloud resources and application services involved. You're very easily going to get a value wrong, you're very easily going to miss a config setting or you'll just end up applying the config to a subset of the systems. Automation helps with all of those issues by taking the manual steps and applying the configuration via a repeatable process. Ansible, Puppet and Chef are all examples of tools which can be used to manage your system configuration in an automated fashion. DevOps training in Tirunelveli will give the learner an understanding of how such tools can be used to automate infrastructure and why having a consistent way of configuring your systems is such a useful thing in a real world development environment.

Track Changes and Maintain Configuration History

Config changes can have an impact on application performance, security and availability. If you don't have a record of them then it's very difficult for the engineers to work out which change has caused a problem. Storing your configuration definitions in version control enables you to look at what changes have been made, compare against earlier versions and work out who made the change. Git is the most common tool used to track configuration files in the same way as you would application code. 

Automate Infrastructure Setup and Maintenance

Modern apps may well require servers, networks, databases, storage and associated access permissions to be set up prior to deployment. Doing this manually is time consuming and can lead to inconsistent results. Infrastructure as code enables teams to define their infrastructure requirements in configuration files which can then be reviewed, re-used and applied via automation. A sensible DevOps course syllabus would include configuration management, infrastructure automation, version control and deployment pipelines.

Strengthen Security and Access Control

Wrong system settings can leave an app open to a range of security risks. Examples would be overly permissive user accounts, open network ports, outdated software packages and services that are misconfigured. Configuration management allows a team to define the approved set of security settings and then apply those consistently across their infrastructure. It enables engineers to define access rules, enforce system policies and ensure that key settings haven't changed in an unexpected way..

Improve Collaboration Between Development and Operations

Developers and Ops engineers need a common understanding of how their applications are configured and deployed. If the configuration is not documented or is based on individual knowledge then you're going to have problems when you're trying to do troubleshooting or doing a release. Having centralised configuration files and documented procedures provides a common reference point for everyone on the team to look at and maintain. DevOps training in Lucknow can be a good way for people looking to get into the field to get a feel for how configuration management fits into the way that teams work.

Detect Configuration Drift and Recover Quickly

Configuration drift is the phenomenon where a system gradually diverges from its intended configuration as a result of manual changes, software updates or inconsistent maintenance. A small difference between servers can have a significant effect on application behaviour. Configuration management tools can be used to compare the actual configuration against the approved definition and alert the team to any unexpected changes. The team can then go and investigate what has happened and revert to the required configuration if appropriate. 

Conclusion

Configuration management is all about keeping environments consistent, automating the various infrastructure tasks that need to be done, improving security and providing a way to track the changes that are made to systems. It's a key enabler of collaboration as it provides a common ground for both developers and the ops engineers to manage the configuration of systems. The value of this becomes increasingly apparent as applications are deployed across multiple servers and multiple cloud platforms. Anyone doing DevOps training in Chandigarh will come across the benefits of configuration management in terms of enabling reliable deployments and making infrastructure management a whole lot easier.