https://www.chenshaowen.com/en/tags/pod/Recent content in Pod on Shaowen Chen's WebsiteHugo -- gohugo.ioen©2016 - {year}, All Rights Reserved.Mon, 31 Mar 2025 00:00:00 +0000weeklyhttps://www.chenshaowen.com/en/blog/kube-proxy-abnormal-causes-pod-on-node-unable-to-access-service.htmlMon, 31 Mar 2025 00:00:00 +0000Mon, 31 Mar 2025 00:00:00 +0000https://www.chenshaowen.com/en/blog/kube-proxy-abnormal-causes-pod-on-node-unable-to-access-service.html1. Problem Description Related Pods 1 2 3 4 5 6 kubectl -n istio-system get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES istiod-647c7c9d95-7n7n6 1/1 Running 0 77m 10.244.173.51 docs-ai-a800-4 <none> <none> istiod-647c7c9d95-k6l88 1/1 Running 0 30m 10.244.210.160 ai-a40-2 <none> <none> istiod-647c7c9d95-pj82r 1/1 Running 0 51m 10.微信公众号Kuberneteskube-proxyPodServiceOperationshttps://www.chenshaowen.com/en/blog/using-calico-to-limit-pod-bandwidth.htmlWed, 12 Feb 2025 00:00:00 +0000Wed, 12 Feb 2025 00:00:00 +0000https://www.chenshaowen.com/en/blog/using-calico-to-limit-pod-bandwidth.html1. Testing the Full Bandwidth Start the iperf3 server on the target host 1 2 3 4 5 iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Test from the client host 1 iperf3 -c x.x.x.x -p 5201 -t 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Connecting to host x.微信公众号CalicoPodBandwidthLimitingKubernetesNetworkOperationsLearningCNITraffic Controlhttps://www.chenshaowen.com/en/blog/source-analysis-kubernetes-management-of-pod-ip.htmlThu, 02 Nov 2023 19:45:31 +0000Thu, 02 Nov 2023 19:45:31 +0000https://www.chenshaowen.com/en/blog/source-analysis-kubernetes-management-of-pod-ip.html1. Subnet Management by kube-controller-manager kube-controller-manager has many controllers; the one related to Pod IP is NodeIpamController. The NodeIpamController mainly manages the podcidr of nodes: when a new node joins the cluster, it allocates a subnet to that node; when a node is deleted, it reclaims the subnet. The subnets微信公众号Source Code AnalysisKubernetesPodIPNetworkLearningOperationshttps://www.chenshaowen.com/en/blog/how-to-set-hpa-for-kubernetes-app.htmlThu, 08 Jun 2023 00:00:00 +0000Thu, 08 Jun 2023 00:00:00 +0000https://www.chenshaowen.com/en/blog/how-to-set-hpa-for-kubernetes-app.html1. Business Background Once an enterprise reaches a certain scale, relying entirely on public cloud infrastructure makes IT costs very high. The cost of purchasing physical machines can be amortized over the next 3 to 5 years, and afterwards the machines are not scrapped; instead they continue to serve beyond their planned lifespan.微信公众号KubernetesHPAPodElastic ScalingOperationsHybrid CloudLearninghttps://www.chenshaowen.com/en/blog/kubernetes-cluster-troubleshooting.htmlTue, 01 Nov 2022 01:00:00 +0000Tue, 01 Nov 2022 01:00:00 +0000https://www.chenshaowen.com/en/blog/kubernetes-cluster-troubleshooting.htmlFailedCreatePodSandBox Error Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: process_linux.go:402: getting the final child's pid from pipe caused: EOF: unknown Resolution Clear the cache 1 echo 3 > /proc/sys/vm/drop_caches Cause Too much memory fragmentation calico-node Keeps Restarting increase max user Error runtime: failed to微信公众号KubernetesClusterTroubleshootingOperationsLearningFault DiagnosisPodBest PracticesProblem Localizationhttps://www.chenshaowen.com/en/blog/how-to-set-up-pod-to-run-to-a-specified-node.htmlMon, 27 Jun 2022 00:00:00 +0000Mon, 27 Jun 2022 00:00:00 +0000https://www.chenshaowen.com/en/blog/how-to-set-up-pod-to-run-to-a-specified-node.html1. Specify a Node via nodeSelector When Creating a Workload Add a label to the node 1 kubectl label node node2 project=A Create the workload with the specified nodeSelector 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 cat <<EOF | kubectl apply -f - apiVersion: apps/v1 kind: Deployment metadata: name: nginx-nodeselector spec: replicas: 1 selector: matchLabels: app: nginx-nodeselector template: metadata: labels: app: nginx-nodeselector spec: nodeSelector: project: A containers: - name: nginx image: nginx EOF Check the workload 1 2 3 4 kubectl get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES nginx-nodeselector-7bb75b7687-7r5xk 1/1 Running 0 19s 10.微信公众号PodKubernetesSchedulingOperationsnodeSelectorLearning