kubernetes Networks 101kubernetes Networks 101
This is an Overview of the Fundamental components for Kubernetes networks like Network Namespaces and Pods. How pods, in a k8s cluster communicate inside a k8s nodes and between Kubernetes
Author: Mauricio Rojas
MetalLB and ECMP with SRLinuxMetalLB and ECMP with SRLinux
BGP multipath allows you to install multiple internal BGP paths and multiple external BGP paths to the forwarding table. Selecting multiple paths enables BGP to load-balance traffic across multiple links.
Ingress and MetalLBIngress and MetalLB
MetalLB is a young project of a load-balancer implementation for bare metal Kubernetes clusters, using standard routing protocols. Ingress exposes HTTP and HTTPS routes from outside the cluster to services
Calico and MetalLB working together with BGPCalico and MetalLB working together with BGP
When we want to make Calico and MetalLB working together with BGP, we’ll run into the following issue: BGP only allows one session to be established per pair of nodes.
Upgrade kernel version in CentosUpgrade kernel version in Centos
You have centos 7.9 with an old kernel, like: [root@fss-a1 ~]# uname -r 3.10.0-1160.36.2.el7.x86_64 And you want to upgrade kernel version in Centos. Just execute: rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh
On-premises Fedora34 K8s HA Cluster with kubeadm and CalicoOn-premises Fedora34 K8s HA Cluster with kubeadm and Calico
Calico is a pure layer-3 network solution to interconnect workloads as containers or virtual servers. It relies on bird (BGP opensource project), iptables and the Linux IP stack to work.
On-premises Fedora34 K8s cluster with kubeadm and CalicoOn-premises Fedora34 K8s cluster with kubeadm and Calico
Calico is a pure layer-3 network solution to interconnect workloads as containers or virtual servers. It relies on bird (BGP opensource project), iptables and the Linux IP stack to work.
Get a newer version of e2fsckGet a newer version of e2fsck
You will hit an error with your e2fsck version. In my case the issue happened in Centos7, when I try to expand the disk for a fedora34 qcow2 image. qemu-img
One-node k8s setup with kubeadm and CalicoOne-node k8s setup with kubeadm and Calico
Calico is a pure layer-3 network solution to interconnect workloads as containers or virtual servers. I relies on bird (BGP opensource project), iptables and the Linux IP stack to work.
Script for TLS SRL and GNMI certificates, non-interactiveScript for TLS SRL and GNMI certificates, non-interactive
This is a script for TLS SRL and GNMI certificates, non-interactive. You can run it in any linux server with openssl. #Create Certificate for Certify Authority openssl genrsa -out CAKey.pem