![]() ![]() One great feature of yamllint is that it has native integration with GitHub and can do annotations directly on the lines of code with issues, making it easier for developers to identify problems and resolve them (Figure 1).įigure 1: This illustrates a yamllint error GitHub annotation. Uses: actions/checkout name: Validate YAML github/workflows/validate-manifests.yaml in your project containing the following: name: Validate Manifests To add a yamllint GitHub action, we can utilize a pre-built GitHub action and create a file called. Running yamllint locally is a great option for developers to get feedback while making changes to a repo, however running yamllint directly in a CI tool such as GitHub actions can help enforce standards and prevent improperly formatted YAML from ever making it into the main branch. github/workflows/ Automating with GitHub actions The following is a common configuration used in many GitOps repos: extends: default The default options can easily be configured by creating a file called. The yamllint provides a default configuration that may provide warnings for some style standards that you many not wish to enforce. Or an entire directory structure: yamllint. Once installed, users can use the yamllint cli tool to manually validate individual files: yamllint my- file.yaml To install yamllint you can run the following command with pip, the Python package management tool: pip install - user yamllint The yamllint is built with Python, making it easy to set up on most Linux and MacOS environments since Python is installed by default and easily installed on any Windows environment. ![]() ![]() Many different YAML linter tools exists, but one that I recommend is yamllint. YAML linters are a great tool to help validate requirements on a repo and enforce consistent style for some of the optional configurations. Additionally, there are many recommended best practices that may not be required but can help improve the consistency and readability of the YAML. As you would expect, YAML has specific syntax standards for validity. YAML is the basis of nearly all GitOps repos. We will discuss automating these validations with GitHub actions, but all of these validations can be configured with another CI tool of your choice. To reduce the number of errors in changes to a GitOps manifest and eliminate the dreaded Unknown state in an ArgoCD application, this article will discuss tools and best practices. When working with GitOps, that feedback cycle is often delayed and users don't receive feedback on changes until they are applied to the cluster, which could be hours or even weeks depending on the approval lifecycle of a change. The user is able to troubleshoot and resolve those issues with the knowledge of the context of the changes they just made. When making changes to objects directly on the cluster, the user is immediately presented with feedback when issues exist. One of the major challenges of managing a cluster and application resources with GitOps is validating that changes to the GitOps manifests are correct. ![]()
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