What are the different types of IT automation tools for System Administration?

Tools like Ansible, Chef, and others are essential for configuring your services. They help maintain your platform's "baseline" and prevent deviations and ad-hoc setups. Today, sysadmins are responsible for managing not just a few machines, but often thousands of servers that require constant attention. To keep things organized, define a standard profile for your services, which serves as a reference for consistency and best practices. This ensures that your configurations align with your desired standards and helps avoid unexpected variations.

Tools such as Ansible, Chef, Puppet, and SaltStack each comes with its own set of advantages. For instance, Ansible's agentless architecture makes it easy to deploy, while Chef’s robustness & matured DSL (Domain Specific Language) are often appreciated for complex setups. Puppet, on the other hand, is known for its powerful framework & extensive module library, SaltStack for its speed and flexibility. Making an informed decision requires a deep dive into the specific needs of the infrastructure, learning curve of the tool, and the community and support around it. We also need to keep integration capabilities in mind as system administrators often need these tools to work with other automation, monitoring, or even custom in-house systems.

Tools such as Ansible, redhat Satelite , redhat insight each comes with its own set of advantages. both used to Automate tasks and helps in digital transformation of any organization .

Many orchestration tools take full advantage of cloud platforms. For those dealing with on-premises or hybrid architectures, there are tools available to help maintain and orchestrate server states. These tools include: Ansible Puppet Chef SaltStack Kubernetes (for containerized apps) Jenkins (for CI/CD) Apache Airflow (for workflows) Rundeck (for operational tasks) Microsoft SCCM (Windows) These tools offer a range of solutions to manage, automate, and orchestrate various aspects of your infrastructure and applications, ensuring they operate efficiently and according to your desired configurations.

Kubernetes, Terraform, AWS CloudFormation, and Azure DevOps serve different purposes. Kubernetes excels in container orchestration, Terraform in infrastructure as code, while AWS CloudFormation and Azure DevOps are cloud-specific. Interaction between orchestration and other automation tools is crucial. Orchestration tools can work with configuration management tools to ensure infrastructure readiness before deploying applications, providing a powerful toolset for automation.

Ansible: Automates configuration, application deployment, and task automation across multiple systems. Kubernetes: Orchestrates containerized applications and automates scaling and deployment. SolarWinds Monitoring. Veeam: Automates data backup, replication, and recovery for virtualized environments. Bash and Shell scripting: Common for automating tasks on Unix and Linux systems.

Scripts are like old and trusted companions. By utilizing tools like GIT, you can centralize and build your own toolkit. Depending on your operating system or platform, there are various scripting and programming languages available that can significantly simplify those constant and manual repetitive tasks.

People keep saying that something is going to replace Bash for Linux scripting, but so far nothing has, yet. And it's been 70 years. Python and others all have their place and can be absolutely useful. But nothing so far has made Bash obsolete. Just please, please, learn how to use Bash properly if you're going to use it. It's SO easy to shoot yourself in the foot if you're not careful. Use shellcheck on all scripts and use 'set -x' and 'set -e' as a basic minimum. Use error trapping, log files, error redirection, nohup, exit codes, and consider running in a screen container to easily monitor running jobs.

Frameworks within scripting languages like Python’s Fabric or PowerShell’s Desired State Configuration (DSC) are tailored for system administration tasks. These frameworks simplify automation tasks and can serve as a bridge between other automation tools. Scripts can trigger orchestration tools, interact with configuration management tools to ensure system consistency, or automate responses to alerts, serving as a glue in the automation toolkit.

Monitoring is your eyes and ears, allowing you to gain full visibility into your platform's activities. Start by configuring alerts, establishing baselines, defining self-remediation options, selecting relevant metrics, and setting Service Level Objectives (SLO) and Service Level Indicators (SLI) to ensure that any irregularities are promptly identified. The success of your platform often hinges on fine-tuning your monitoring system. Ensuring you have the right metrics, well-calibrated alerts, and effective alert delivery methods will make or break your platform's reliability.

Integrating monitoring tools with configuration management can alert or auto-remediate configuration drift. Integration with orchestration tools can automate resource scaling based on performance metrics. Tools like Prometheus and ELK Stack (Elasticsearch, Logstash, Kibana) are gaining traction. They provide insights and robust APIs for integration with other systems, enabling a holistic approach to system administration.

Selenium, Jenkins, SonarQube serve different testing and validation purposes. Integrating them within development and deployment workflows ensures functionality, quality, and security of IT resources. For instance, Jenkins can automate deployment, running tests via Selenium and code analysis via SonarQube before deployment, ensuring only tested and validated code is deployed, reducing bugs and vulnerabilities.

Testing is a crucial step that should never be overlooked. I recall an incident from years ago when our security team urgently requested a fix to be applied to one of our web servers. Despite expressing concerns about potential issues, the pressure to implement the fix quickly was significant. Regrettably, we proceeded without thorough testing, and a few weeks later, one of our applications began throwing 500 errors. It turned out that the issues stemmed from that hasty implementation. This experience reinforced the importance of testing, even when there's pressure to act hastily. In the end, you'll be the one tasked with fixing the problems.

Security is most effective when it's a top priority. Engaging security teams for guidance and best practices is essential. However, things can take a turn for the worse when security teams lack hands-on experience and technical knowledge. In such cases, you might find yourself grappling with overly restrictive security measures that don't consider the user experience. It's important to strike a balance between security and usability to ensure a smoother and more secure operation.

With the increasing complexity of enterprise environments, Security tooling is essential. Having multiple products managed by multiple teams with varying levels of security expertise is nearly impossible to patch and monitor closely without robust Security tooling. While the initial investment may be costly for these types of tools, in the long run the security benefits outweigh the costs.

I always recommend engineers begin automating tasks they frequently perform and find less engaging, such as generating reports, system restarts, disk expansion, application reinstalls, and more. Consider your scripts as evolving products that improve over time. Using tools like Git enables you to share your work and receive suggestions from others.