zerogvt

* [Kubernetes production best practices](https://learnk8s.io/production-best-practices/)
* [Coursera SRE course](https://www.coursera.org/learn/site-reliability-engineering-slos/home/welcome)

zerogvt

git squash:
> git rebase -i HEAD~5
> git push --force origin yourbranchname

zerogvt

/*
Exercise: Errors
Copy your Sqrt function from the earlier exercise and modify it to return an error value.

Sqrt should return a non-nil error value when given a negative number, as it doesn't support complex numbers.

Create a new type

type ErrNegativeSqrt float64
and make it an error by giving it a

zerogvt

/*
Exercise: Stringers
Make the IPAddr type implement fmt.Stringer to print the address as a dotted quad.

For instance, IPAddr{1, 2, 3, 4} should print as "1.2.3.4".

https://tour.golang.org/methods/18
*/

zerogvt

/*
Exercise: Fibonacci closure
Let's have some fun with functions.

Implement a fibonacci function that returns a function (a closure) that returns successive fibonacci numbers (0, 1, 1, 2, 3, 5, ...).

https://tour.golang.org/moretypes/26
*/

zerogvt

/*
Exercise: Maps
Implement WordCount. It should return a map of the counts of each “word” in the string s. The wc.Test function runs a test suite against the provided function and prints success or failure.

You might find strings.Fields helpful.

https://tour.golang.org/moretypes/23
*/

package main

zerogvt

/*
Exercise: Slices
Implement Pic. It should return a slice of length dy, each element of which is a slice of dx 8-bit unsigned integers. When you run the program, it will display your picture, interpreting the integers as grayscale (well, bluescale) values.

The choice of image is up to you. Interesting functions include (x+y)/2, x*y, and x^y.

(You need to use a loop to allocate each []uint8 inside the [][]uint8.)

(Use uint8(intValue) to convert between types.)

zerogvt

#!/usr/bin/env python
"""
mocking requests calls

"""
import mock
import unittest
import requests
from requests.exceptions import HTTPError

zerogvt

#!/bin/bash
set -e
set -u

CI_MASTER_URL="http://ci-1"

node_online() {
    curl --silent "$CI_MASTER_URL/computer/$1/api/json" | grep --silent '"temporarilyOffline":false'
}

zerogvt

#!/usr/bin/env bash

set -o nounset -o errexit -o pipefail

usage() {
    cat <<EOM
    Usage:
      $(basename $0) [OPTIONS]
      $(basename $0) [ -j | --jenkins-url | -n | --node-name | -s | -d | --desc | --slave-home | -e | --executors | -sh | --ssh-host | -sp | --ssh-port
                              | -c | --cred-id | -l | --labels | -u | --user-id | -p | --password | -h | --help ]