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• 0.1. References
• 0.2. Other cheatsheets
• 0.3. Manage multiple gcloud config configurations
  • 0.3.1. Switch gcloud context with gcloud config
• 0.4. Credentials
• 0.5. info
• 0.6. projects
• 0.7. zones & regions
• 0.8. Organization
• 0.9. billing

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Some useful resources regarding Kubernetes Operators, CRDs, etc.

• Kubernetes sample controller: https://github.com/kubernetes/sample-controller
• Joe Beda's TGIK sample repo and YouTube videos: https://github.com/jbeda/tgik-controller
• Thomas Stringer's blog post: https://medium.com/@trstringer/create-kubernetes-controllers-for-core-and-custom-resources-62fc35ad64a3
• Kube-controller-demo by Aaron Levy: https://github.com/aaronlevy/kube-controller-demo
• Analyzing value of Operator Framework for Kubernetes community: https://itnext.io/analyzing-value-of-operator-framework-for-kubernetes-community-5a65abc259ec
• Steps to generate CRD/Operator code: cloud-ark/kubeplus#14
• kubebuilder: https://github.com/kubernetes-sigs/kubebuilder
• CoreOS operator framework: https://coreos.com/blog/introducing-operator-framework
• A thread on Reddit: https://www.reddit.com/r/kubernetes/comments/8ien90/if_i_were_to_build_an_operator_what_should_i_use/

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Reference

• https://www.linuxtrainingacademy.com/systemd-cheat-sheet/
• https://www.linux.com/training-tutorials/understanding-and-using-systemd/
• https://www.digitalocean.com/community/tutorials/how-to-use-systemctl-to-manage-systemd-services-and-units
• https://www.digitalocean.com/community/tutorials/systemd-essentials-working-with-services-units-and-the-journal
• https://www.youtube.com/watch?v=ZUX9Fx8Rwzg&index=9&list=PLCq0ZVVxGP0Y-xlum2pnhqwsrIf61J6Ka
• https://www.youtube.com/watch?v=AtEqbYTLHfs

show service unit file

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#!/usr/bin/env bash

set -euo pipefail
IFS=$'\n\t'

readonly _CISCO_VPN="/opt/cisco/anyconnect/bin/vpn"
readonly _GREEN='\033[0;32m'
readonly _RED='\033[0;31m'
readonly _NC='\033[0m'

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Application Instance Identity and Intro to Envoy in PCF

(the content below is heavily borrowed from Eric Malm's blog post on application identity and Aaron Hurley's CFSummit talk on upcoming changes to routing tier in CF)

• Application Instance Identity and Intro to Envoy in PCF
  • Timeline :
    • PCF 1.12 - Enabled Application Instance Identity
• PCF 2.0 - Secure Service-Instance Credential Delivery

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#!/bin/bash
# Based on kizbitz/dockerhub-v2-api-organization.sh at https://gist.github.com/kizbitz/175be06d0fbbb39bc9bfa6c0cb0d4721

# Example for the Docker Hub V2 API
# Returns all images and tags associated with a Docker Hub organization account.
# Requires 'jq': https://stedolan.github.io/jq/

# set username, password, and organization
UNAME=""
UPASS=""

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#!/bin/bash
# Based on kizbitz/dockerhub-v2-api-organization.sh at https://gist.github.com/kizbitz/175be06d0fbbb39bc9bfa6c0cb0d4721

# Example for the Docker Hub V2 API
# Returns all images and tags associated with a Docker Hub organization account.
# Requires 'jq': https://stedolan.github.io/jq/

# set username, password, and organization
UNAME=""
UPASS=""

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Program to create an ansible inventory from all the deployments, jobs and
instances managed by a BOSH Director.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

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#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog

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# Add Neutron security groups for ping and ssh

neutron security-group-rule-create   \
        --protocol icmp              \
        --direction ingress          \
        --remote-ip-prefix 0.0.0.0/0 \
        default

neutron security-group-rule-create   \
        --protocol tcp               \