modified: README.md

README.md

@@ -4,8 +4,9 @@ Kubernetes is an open‑source platform that automates the deployment, scaling,
 
 - [k3s](#k3s)
   - [Install / Setup](#install--setup)
-- [Kubernetes DNS](#kubernetes-dns)
-  - [Services DNS Name](#services-dns-name)
+  - [misc](#misc)
+    - [prune old image](#prune-old-image)
+    - [check system logs](#check-system-logs)
 - [kubectl](#kubectl)
   - [Get Pod](#get-pod)
   - [Pod delete](#pod-delete)
@@ -45,6 +46,38 @@ K3s is a lightweight, certified Kubernetes distribution designed to run in resou
 curl -sfL https://get.k3s.io | sh -
 ```
 
+Install specific version and disable:
+
+- flannel (alternative example calico)
+- servicelb (alternative example metallb)
+- traefik (then install using helm chart or custom manifests for better control)
+
+```bash
+curl -sfL https://get.k3s.io | INSTALL_K3S_VERSION=v1.33.3+k3s1 INSTALL_K3S_EXEC="--flannel-backend=none \
+--disable-network-policy \
+--cluster-cidr=10.42.0.0/16 \
+--disable=servicelb \
+--disable=traefik" \
+ sh -
+```
+
+### misc
+
+#### prune old image
+
+prune old images, execute on kubernetes host node
+
+```bash
+crictl rmi --prune
+```
+
+#### check system logs
+
+```bash
+sudo journalctl -u k3s-agent --since "1h ago" --reverse --no-pager | more
+sudo journalctl -u k3s-agent --since "1 hour ago" --reverse | grep -i "Starting k3s-agent.service" 
+sudo journalctl -u k3s --reverse | grep -i "Starting k3s.service"
+
 ## Kubernetes DNS
 
 **Automatic DNS Records:** Kubernetes automatically creates DNS entries for Services and Pods. This allows workloads to connect using predictable names instead of IPs, which may change.