tiewei

kubebuilder vs operator-sdk

Abstract

kubebuilder and operator-sdk are two major tools used to set up a controller/operator code base for kubernetes CRDs. Both of them under the hood using controller-runtime to adding a manager, api scheme and creates an structs implements a reconciler interface, thus the major difference are around the tools for integration, testing and etc.

Backgroud

tiewei

import uuid

from datetime import datetime
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, Boolean, Enum, ForeignKey, DateTime

TEMPLATE_ID = '00000000-0000-0000-0000-000000000003'
CREDENTIAL_ID = '00000000-0000-0000-0000-000000000001'

tiewei

---
- hosts: tenant_compute*
  gather_facts: no
  tasks:
    - shell: ovs-vsctl list-ports br-int | egrep "tap" | sed "s/^tap//"
      register: qvo

    - shell: ovs-vsctl get Port qvo{{item}}  tag
      with_items: qvo.stdout_lines
      register: qvo_tags

tiewei

# This is a lookup for yaml file
# e.g /path/to/yaml/file
# ---
# foo: foo_value
# users:
#   user_one: Jim
#   user_two: Tom
#
# With inline lookup, the value of the key has to be a string
# 1. var1: "{{lookup('yaml_file', '/path/to/yaml/file key=foo')"

tiewei

- What do Etcd, Consul, and Zookeeper do?
  - Service Registration:
    - Host, port number, and sometimes authentication credentials, protocols, versions
      numbers, and/or environment details.
  - Service Discovery:
    - Ability for client application to query the central registry to learn of service location.
  - Consistent and durable general-purpose K/V store across distributed system.
    - Some solutions support this better than others.
    - Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
    - Centralized locking can be based on this K/V store.

tiewei

#! /bin/bash

gerrit_user='<user>'
gerrit_pass='<pass>'
gerrit_ip='<gerrit_ip>'
gerrit_port='8083'
gerrit_clone_port='29418'

backup_dir="/path/to/git_backup/dir"

tiewei

require 'rufus-scheduler'

module Clipper

  class TaskScheduler

    def initialize(logger)
      @scheduler = build_scheduler(logger)
      @scheduled_tasks = []
      @running = false