geekbass

Elasticsearch Admin Endpoint Cheatsheet

/_cluster/health?pretty: For the cluster health indicator.

/_status?pretty : For all information about all the indices.

/_nodes?pretty : For all information about the nodes.

geekbass

Rescue ec2 via Cloud-Init

If something takes over your instance and you lose ssh, here is a way that you can recover it via Cloud-init (As long as you are using Cloud-Init). Use boot_cmd to recover or undo anychanges that caused this.

Find the instance ID and stop it.

aws ec2 stop-instances --instance-ids i-instanceID --force

Create your file. Use boot_cmd as this will execute on boot every time. See https://cloudinit.readthedocs.io/en/latest/topics/examples.html?highlight=systemd#run-commands-on-first-boot for the details.

Base64 encode it.

geekbass

# Find Public IP
data "http" "whatismyip" {
  url = "http://whatismyip.akamai.com/"
}

# Begin Variables 
variable "aws_ami" {
  description = "AMI to use"
  default     = "ami-4bf3d731"
}

geekbass

#!/bin/bash
ip route get 8.8.8.8 | awk '{print $7; exit}'

geekbass

#!groovy

node {

  def err = null
  def environment = "Development"
  currentBuild.result = "SUCCESS"
  load "$JENKINS_HOME/.envvars/.env.groovy"

  try {

geekbass

Useful Kubectl Commands

kubectl run -i --tty --rm debug --image=curlimages/curl --restart=Never -- www.google.com -vvv

kubectl run -i --tty --rm debug --image=busybox --restart=Never -- sh

Testing Volume Mount from Configmap

geekbass

My list of must have Plugins for PyCharm

1. Nord Theme

2. MicroPython

3. Terraform HCL

4. Docker

geekbass

Update Branch with Master if been updated since

git pull origin master

Check commit history for $N number of Commits

git reset --soft HEAD~$N
git commit -m "squashing commits"

If preivous push(s) to repo, force push (+)

git push origin +name-of-feature-branch

geekbass

curl -skSL \
    -H "Authorization: token=$(dcos config show core.dcos_acs_token)" \
    -H "Content-Type: application/json" \
    "$(dcos config show core.dcos_url)/mesos/slaves" | \
    jq -er '[.slaves[] | select(.active==true) | {id: .id, hostname: .hostname, active: .active, reserved_resources_full: (.reserved_resources_full)}]' | \
    jq -er '[.[] | select(.reserved_resources_full | length > 0)]' | \
    tee reservations.json

geekbass

• have fun with them
• projections
• filters
• resource-keys
• scripting-gcloud
• http://cloudplatform.googleblog.com/2018/03/introducing-GCPs-new-interactive-CLI.html
• https://medium.com/@Joachim8675309/getting-started-with-gcloud-sdk-part-1-114924737
• https://medium.com/@Joachim8675309/getting-started-with-gcloud-sdk-part-2-4d049a656f1a

auth