moio

#!/bin/bash

# Azure storage container SAS URL and token for uploading. Only creation permission is necessary
BLOB_URL=''
BLOB_TOKEN=''

cleanup() {
    echo "Cleaning up..."
    echo "Setting rancher logs back to error"
    kubectl -n cattle-system get pods -l app=rancher --no-headers -o custom-columns=name:.metadata.name | while read rancherpod; do kubectl -n cattle-system exec $rancherpod -c rancher -- loglevel --set error; done

moio

import { check, fail } from 'k6';
import http from 'k6/http';

// Parameters
const vus = __ENV.VUS || 1
const perVuIterations = __ENV.PER_VU_ITERATIONS || 30
const baseUrl = __ENV.BASE_URL
const user = __ENV.USER
const password = __ENV.PASSWORD
const cluster = __ENV.CLUSTER || "local"

moio

Explore a Rancher pprof CPU profile

Grab a kubeconfig file pointing to the Rancher upstream cluster, then copypaste:

export KUBECONFIG=/path/to/the/upstream_cluster.yaml

for pod in $(kubectl get pods -n cattle-system --no-headers -l app=rancher | cut -d ' ' -f1); do
  echo Collecting 30s worth of profile data for $pod...
 kubectl exec -n cattle-system $pod -- curl -s http://localhost:6060/debug/pprof/profile -o profile

moio

#!/usr/bin/env ruby
# encoding: UTF-8

# EXAMPLE
#
# {
#   "kind": "Event",
#   "apiVersion": "audit.k8s.io/v1",
#   "level": "Metadata",
#   "auditID": "f6618a15-8e4f-4f82-95b3-7592ed544eb9",

moio

#!/usr/bin/env ruby
# encoding: UTF-8

# Prints kubectl commands to trim Helm history in excess of the parameter below
# Assumes the default Helm history storage (Secrets)

HISTORY_ENTRIES_TO_RETAIN = 2

namespaces = `kubectl get ns -o name`
    .split

moio

#!/usr/bin/env ruby
# encoding: UTF-8

# EXAMPLE
#
# {
#   "kind": "Event",
#   "apiVersion": "audit.k8s.io/v1",
#   "level": "Metadata",
#   "auditID": "f6618a15-8e4f-4f82-95b3-7592ed544eb9",

moio

Run the following commands:

export KUBECONFIG=/path/to/the/downstream_cluster.yaml

while true; do
    for pod in $(kubectl get pods -n cattle-system --no-headers -l app=cattle-cluster-agent | cut -d ' ' -f1); do
      echo getting heap for $pod
      kubectl exec -n cattle-system $pod -- curl -s http://localhost:6060/debug/pprof/heap -o heap
 kubectl cp cattle-system/${pod}:heap ./${pod}-heap-$(date +'%Y-%m-%dT%H_%M_%S')

moio

Explore a fleet-agent pprof CPU profile

Grab a kubeconfig file pointing to the fleet-agent downstream cluster, then copypaste:

export KUBECONFIG=/path/to/kubeconfig.yaml

# get pod name
if kubectl get ns | grep cattle-fleet-system; then
 export NAMESPACE=cattle-fleet-system

moio

kubectl: install and run KWOK

Installation

# install KWOK
KWOK_WORK_DIR=$(mktemp -d)
KWOK_REPO=kubernetes-sigs/kwok
KWOK_LATEST_RELEASE=$(curl "https://api.github.com/repos/${KWOK_REPO}/releases/latest" | jq -r '.tag_name')

moio

kubectl: access a host's /proc filesystem from a (privileged) Pod

export NODE_NAME=35.93.96.175
kubectl apply -f - <<EOF
apiVersion: v1
kind: Pod
metadata:
  name: proc-writer
 labels: