This page shows how to assign a memory request and a memory limit to a Container. A Container is guaranteed to have as much memory as it requests, but is not allowed to use more memory than its limit. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts.| Kubernetes
This page shows how to assign a CPU request and a CPU limit to a container. Containers cannot use more CPU than the configured limit. Provided the system has CPU time free, a container is guaranteed to be allocated as much CPU as it requests. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plan...| Kubernetes
Kubernetes nodes can be scheduled to Capacity. Pods can consume all the available capacity on a node by default. This is an issue because nodes typically run quite a few system daemons that power the OS and Kubernetes itself. Unless resources are set aside for these system daemons, pods and system daemons compete for resources and lead to resource starvation issues on the node. The kubelet exposes a feature named 'Node Allocatable' that helps to reserve compute resources for system daemons.| Kubernetes
Node-pressure eviction is the process by which the kubelet proactively terminates pods to reclaim resources on nodes. FEATURE STATE: Kubernetes v1.31 [beta] (enabled by default: true) Note:The split image filesystem feature, which enables support for the containerfs filesystem, adds several new eviction signals, thresholds and metrics. To use containerfs, the Kubernetes release v1.32 requires the KubeletSeparateDiskGC feature gate to be enabled. Currently, only CRI-O (v1.29 or higher) offers ...| Kubernetes
This page introduces Quality of Service (QoS) classes in Kubernetes, and explains how Kubernetes assigns a QoS class to each Pod as a consequence of the resource constraints that you specify for the containers in that Pod. Kubernetes relies on this classification to make decisions about which Pods to evict when there are not enough available resources on a Node. Quality of Service classes Kubernetes classifies the Pods that you run and allocates each Pod into a specific quality of service (Qo...| Kubernetes
Learn about the differences between the CPU Manager's policies and get recommendations for specifying CPU requests and limits.| Datadog
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- tl;dr - My cluster-wide prometheus scraping config was picking up port 25 as a good place to send GET /metrics requests, and broke my surprisingly fragile email setup (Haraka -> Maddy), simply by inundating it with invalid HTTP requests to a port meant for SMTP. My mailer setup makes use of two pretty good F/OSS tools that I rarely have problems with: Haraka Maddy They work great, and I don’t spend much time thinking about them – I often set up a new maddy instance with separate backups...| vadosware.io
