Install AWS cloud provider on a k3s cluster

2 min read

One of the drawbacks of installing k3s on a EC2 instance versus using EKS is that we loose the AWS integration, so we cannot use AWS load balancers by default. Thanks to the AWS cloud provider we can overcome this limitation

10/05/2022

Backup and restore a K3S cluster

3 min read

If we have a K3S Kubernetes cluster that we want to create a backup of, we can use the k3s etcd-snapshot, but that's just going to backup the information related to Pods and other Kubernetes objects, it won't backup data that resides outside of the cluster such as disks (PersistentVolumes, emptyDirs, ...), or even it's state.

Having clarified that we are just going to backup some of the data, let's take a look how to do it.

06/05/2022

K3s: Upgrade your Traefik ingress controller to version 2

2 min read

If you have K3s' system-upgrade-controller installed you might have noticed how charts appear under /var/lib/rancher/k3s/server/static/charts but your traefik Ingress controller is not being updated:

# pwd
/var/lib/rancher/k3s/server/static/charts
# ls -lrt
total 104
-rw------- 1 root root 27292 May 21  2021 traefik-1.81.0.tgz
-rw------- 1 root root   914 Nov 21 17:19 traefik-crd-9.18.2.tgz
-rw------- 1 root root 17008 Nov 21 17:19 traefik-9.18.2.tgz
-rw------- 1 root root   914 Dec  3 07:14 traefik-crd-9.18.201.tgz
-rw------- 1 root root 17041 Dec  3 07:14 traefik-9.18.201.tgz
-rw------- 1 root root 17685 Dec 22 19:07 traefik-10.3.001.tgz
-rw------- 1 root root  7396 Dec 22 19:07 traefik-crd-10.3.001.tgz

27/12/2021

Install longhorn on a K3S cluster

3 min read

Longhorn is a highly available persistent storage for Kubernetes. It implements distributed block storage using containers and microservices creating a dedicated storage controller for each block device volume and synchronously replicating the volume across multiple replicas stored on multiple nodes. It might sound intimidating, but it's very straightforward to install

13/12/2021

Install a multi-master K3S cluster with embedded etcd

2 min read

K3s has added full support for embedded etcd as of release v1.19.5+k3s1, so now we can create a multi-master cluster without the need of having an external MySQL database

08/11/2021