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@RagedUnicorn
RagedUnicorn / cloud_init_debugging.md
Last active January 22, 2025 12:55
Debugging tipps when working with cloud-init

Cloud-Init Debugging

Cloud-init combined with terraform can be a powerful tool to provision instances on startup. Debugging scripts that are run by cloud-init however are not the easiest to debug.

Logs

Usually on an Ubuntu machine a lot of what is happening can be found in the syslog

cat /var/log/syslog
@janeczku
janeczku / agent-register-handshake.sh
Last active January 8, 2021 23:33
Replay/test the initial registration handshake between Cattle node agent and Rancher server
#!/bin/bash
# Execute this script in a cattle-node-agent container
# Successful websocket handshake is indicated by following line being printed:
# HTTP/1.1 101 Switching Protocols
TOKEN=$(cat /cattle-credentials/token)
URL="$(cat /cattle-credentials/url)/v3/connect/register"
echo "Using TOKEN: $TOKEN"
echo "Using URL: $URL"
@patrick0057
patrick0057 / README.md
Last active October 2, 2020 21:48
Rancher 2.x lazy ssh

lssh function

Changelog

  • 06.03.2020 - added zsh function that works for WSL
  • 04.21.2020 - updated mac os x code to work with zsh and improved instructions.
  • 01.02.2020 - added Windows Subsystem for Linux and broke out each OS into its own section for easy copy and paste
  • 12.10.2019 - added support for Rancher 1.6 tar.gz files (requires gtar on mac)
  • 12.06.2019 - made command lazier by not requiring user to paste the IP.

Description

Quick bash function to make my life easier when sshing into Rancher nodes. Make sure to update your default web browser download directory by modifying line 2 of the script. For mac: brew install findutils

@patrick0057
patrick0057 / README.md
Last active May 1, 2021 18:05
go dumps for Rancher 2.x support

go dumps for Rancher 2.x support

If you are experiencing random crashing of your Rancher 2.x pods or docker container, sometimes Rancher support will ask you to take a go routine dump or a memory dump. Below are the commmands you need to run inside of your Rancher container or pod.

#exec into Rancher pod or container first
mkdir dumps
curl localhost:6060/debug/pprof/goroutine -o dumps/goroutine
curl localhost:6060/debug/pprof/heap -o dumps/heap
curl localhost:6060/debug/pprof/threadcreate -o dumps/threadcreate
curl localhost:6060/debug/pprof/block -o dumps/block
curl localhost:6060/debug/pprof/mutex -o dumps/mutex
@superseb
superseb / identify_rke_rancherlaunched_imported.md
Last active June 7, 2020 03:24
Identify RKE / Rancher Launched Kubernetes / Imported clusters

Identify RKE / Rancher Launched Kubernetes / Imported clusters

This will describe how to identify clusters that are created by RKE, created by Rancher or managed by Rancher

RKE

Clusters created by RKE CLI have:

  • Cluster state stored as Configmap called full-cluster-state in namespace kube-system (cluster-state before RKE v0.2.0)
  • kubectl -n kube-system get configmap full-cluster-state
@dkeightley
dkeightley / userdata.sh
Last active December 4, 2023 13:33
RKE2 AWS cloud controller manager
#!/bin/sh
PUBLIC_IP=$(curl ifconfig.io)
# export INSTALL_RKE2_VERSION="v1.20.5+rke2r1"
curl -sfL https://get.rke2.io | sh -
provider_id="$(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone)/$(curl -s http://169.254.169.254/latest/meta-data/instance-id)"