https://wenhan.blog/en/tags/rancher/ Recent content in Rancher on Wenhan blog Hugo -- gohugo.io en-US Wed, 26 Jan 2022 11:33:00 +0900 https://wenhan.blog/en/posts/20220126_--node-cidr-mask-size_error/ Wed, 26 Jan 2022 11:33:00 +0900 https://wenhan.blog/en/posts/20220126_--node-cidr-mask-size_error/ When I changed the CIDR of an rke cluster, I encountered the following error and the cluster creation failed. 1 {"log":"F1203 01:36:22.168496 1 node_ipam_controller.go:115] Controller: Invalid --cluster-cidr, mask size of cluster CIDR must be less than or equal to --node-cidr-mask-size configured for CIDR family\n","stream":"stderr","time":"2021-12-03T01:36:22.16859524Z"} The relevant part of cluster.yaml is as follows: 1 2 3 4 5 6 services: kube-controller: cluster_cidr: 10.42.0.0/25 service_cluster_ip_range: 10.43.0.0/25 kube-api: service_cluster_ip_range: 10.43.0.0/25 The problematic part is the mask size of the CIDR. https://wenhan.blog/en/posts/20211111_fleet-demo/ Thu, 11 Nov 2021 16:18:38 +0900 https://wenhan.blog/en/posts/20211111_fleet-demo/ This article builds a single-node Rancher server and two k3s cluster environments, and uses Rancher’s Continuous Delivery feature to operate both k3s clusters via GitOps. Step 1: Deploying a Rancher Server First, on the rancher node, run the following docker command to set up a single-node Rancher server. 1 2 3 4 sudo docker run -d --restart=unless-stopped \ -p 80:80 -p 443:443 \ --privileged \ rancher/rancher:v2.5.10 The Rancher server will start in about a minute.