![]() Supports alphanumeric with dashes, underscores, and dots.The corresponding label values could be “production”, “testing,” and “development.” You can skip the prefix if you don’t intend to distribute your resources outside of your company (as long as you don’t expect a naming conflict with another third-party package installed in your environment using the same label without a prefix). For example, you may use /environment to designate the environment type. The name (in the example /) contains the label’s arbitrary property name. For example, gatekeeper is a Customer Resource Definition (CRD) policy enforcer that can be installed as a chart using helm, and its labels are prefixed with gatekeeper.sh/. The prefix also allows the use of multiple labels which might otherwise conflict with each other. If you are installing external modules using helm, their labels’ keys likely have prefixes attached. The prefix is helpful for modules that are not private to the user, such as kube-scheduler, kubectl, etc. Name: supports up to 63 characters, including: alphanumeric, dashes, underscores, and dot characters.Prefix: Optional must be a valid DNS subdomain (e.g., "/").Keys can have two segments: a prefix and a name separated by a slash, for example, "/". Kubernetes labels use a key-value pair structure. Include Required Labels in Pod Templates. ![]() Create Organization-Wide Label Naming Conventions.Labeling Best Practicesįollow these eight essential best practice recommendations to avoid common labeling mistakes: This command runs kubectl delete on all the returned objects that have the labels "environment": "dev" or "environment": "sit". Kubectl delete deployment,services,statefulsets -l environment in (dev,sit) For example, you may use a label to record an owner identifier for the person responsible for a pod/deployment. Kubernetes labels are commonly used for sharing information with other colleagues. Kubernetes provides built-in support for querying objects via labels and applying bulk operations on the subset selected. Labels are key-value pairs used to attach identifying metadata to Kubernetes objects. To help organize cluster resources, Kubernetes provides two ways to tag metadata to objects: 1. What You Should NOT Do With Kubernetes Labels.You use Kubecost to generate the report and group the data by the relevant label. You use labels to isolate those containers.Ĭost monitoring, allocation, and managementĪ handful of tenants share a cluster, and you want to generate a cost allocation report. You want to apply a patch but only to a dozen containers supporting your application front-end. ![]() Its label helps you quickly determine if it supports a test or a production environment. Labels can help simplify and solve many day-to-day challenges encountered in Kubernetes environments: ChallengeĪ pod’s CPU pegs at 100%. Kubernetes labels allow DevOps teams to perform in-cluster object searches, apply bulk configuration changes, and more. This can be set to the top level application being supported.Using metadata tags attached to different resources and objects is a must-have requirement for any Kubernetes (K8s) environment. For example, application software and a database to produce a website. ![]() When multiple charts or pieces of software are used together to make one application. This is a common label for marking the different roles that pieces may play in an application. This should be the app name, reflecting the entire app. Not relied upon frequently for operational purposes. These are idiomatic or commonly in use, but are Labels that are marked RECĪre recommended, and should be placed onto a chart for global consistency. Never requires that a particular label be present. The following table defines common labels that Helm charts use. ![]() If an item of metadata is not used for querying, it should be set as an Operators can conveniently find all of the instances of a particular chart to
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