Production-Grade Container Orchestration

Production-Grade Container Orchestration

Overview Package v1beta4 defines the v1beta4 version of the kubeadm configuration file format. This version improves on the v1beta3 format by fixing some minor issues and adding a few new fields. A list of changes since v1beta3: Support custom environment variables in control plane components under ClusterConfiguration. Use apiServer.extraEnvs, controllerManager.extraEnvs, scheduler.extraEnvs, etcd.local.extraEnvs. The ResetConfiguration API type is now supported in v1beta4. Users are able to reset a node by passing a --config file to kubeadm reset.

Package v1beta1 is the v1beta1 version of the API. Resource Types AuthenticationConfiguration AuthorizationConfiguration EgressSelectorConfiguration TracingConfiguration TracingConfiguration Appears in: KubeletConfiguration TracingConfiguration TracingConfiguration TracingConfiguration provides versioned configuration for OpenTelemetry tracing clients. FieldDescription endpoint string Endpoint of the collector this component will report traces to. The connection is insecure, and does not currently support TLS. Recommended is unset, and endpoint is the otlp grpc default, localhost:4317. samplingRatePerMillion int32 SamplingRatePerMillion is the number of samples to collect per million spans.

Recommendations for designing and deploying admission webhooks in Kubernetes.

Production-Grade Container Orchestration

This page explains how to add Linux worker nodes to a kubeadm cluster. Before you begin Each joining worker node has installed the required components from Installing kubeadm, such as, kubeadm, the kubelet and a container runtime. A running kubeadm cluster created by kubeadm init and following the steps in the document Creating a cluster with kubeadm. You need superuser access to the node. Adding Linux worker nodes To add new Linux worker nodes to your cluster do the following for each machine:

This page shows how a Pod can use a downwardAPI volume, to expose information about itself to containers running in the Pod. A downwardAPI volume can expose Pod fields and container fields. In Kubernetes, there are two ways to expose Pod and container fields to a running container: Environment variables Volume files, as explained in this task Together, these two ways of exposing Pod and container fields are called the downward API.

Debugging common cluster issues.

This task shows how to scale a StatefulSet. Scaling a StatefulSet refers to increasing or decreasing the number of replicas. Before you begin StatefulSets are only available in Kubernetes version 1.5 or later. To check your version of Kubernetes, run kubectl version. Not all stateful applications scale nicely. If you are unsure about whether to scale your StatefulSets, see StatefulSet concepts or StatefulSet tutorial for further information. You should perform scaling only when you are confident that your stateful application cluster is completely healthy.