Ronald Petty ronaldpetty

Hack 1 - Replace scheduler

Process #1 - build replacement scheduler

NOTE - if control changes IPs, code will need updates (for api, currently not ENV or file)
On a machine with Docker
git clone http://github.com/ronaldpetty/scheduler.git (derived from kelseyhightower/scheduler)
cd ~/scheduler
git checkout tls_healthz
build image - sudo docker build -t k8s.gcr.io/kube-scheduler:v1.22.4 --no-cache .
extract image - sudo docker save k8s.gcr.io/kube-scheduler:v1.22.4 -o hightower.tar

ronaldpetty@Ronalds-MBP src % pwd
/Users/ronaldpetty/go/src
ronaldpetty@Ronalds-MBP src % tree pc                         
pc
└── driver.go

0 directories, 1 file
ronaldpetty@Ronalds-MBP src % cat pc/driver.go 
package main

Convert:

kubectl run curler --image giantswarm/tiny-tools --serviceaccount app-sa --command -- /usr/bin/tail -f /dev/null

Since --serviceaccount is deprecated. One alternative is using kustomize. Its more work, but a good technique you can reuse for other deprecated options or automation.

kubectl --dry-run=client -o yaml run curler --image giantswarm/tiny-tools --command -- /usr/bin/tail -f /dev/null > curler.yaml

cat &lt; addsa.yaml


	![](images/2022-07-28-15-30-32.png)

	```
	~$ pip install SQLAlchemy

	Defaulting to user installation because normal site-packages is not writeable
	Collecting SQLAlchemy
	Downloading SQLAlchemy-1.4.39-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl (1.6 MB)
	━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.6/1.6 MB 8.5 MB/s eta 0:00:00

	import threading
	import time

	class X:
	def __init__(self):
	self.a = 1
	self.b = 2
	self.lock = threading.RLock()

	def changeA(self):

	* `docker container run --rm -d --name mdb mongo`
	* `docker container inspect mdb \| grep IPA` # to get IP for code unless this is the only container
	* `python3 -m venv faster`
	* cd `faster`
	* `source ./bin/activate`
	* `python3 -m pip install pymongo

	To run the code:

	* `python3 code.py #writers #readers #docs`

	from multiprocessing import Pool
	from pymongo import MongoClient
	import datetime
	import sys

	def insert(x):
	print("insert")
	print(f"instance {x}")
	client = MongoClient('172.17.0.2', 27017)
	db = client.test_database

	/game-of-life# cat pom.xml
	<?xml version="1.0" encoding="UTF-8"?>
	<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.wakaleo.gameoflife</groupId>
	<artifactId>gameoflife</artifactId>
	<version>1.0-SNAPSHOT</version>
	<packaging>pom</packaging>
	<name>gameoflife</name>
	<url>https://github.com/wakaleo/game-of-life</url>

	package main

	import (
	"strconv"
	"time"
	)

	func main() {
	c := make(chan string)
	w := make(chan struct{})

	package main

	import (
	"context"
	"time"
	)

	func one(ctx context.Context) {
	print("one create\n")
	ctx5, _ := context.WithTimeout(ctx, time.Second*5)