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Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

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set -e, -u, -o, -x pipefail

The set lines

• These lines deliberately cause your script to fail. Wait, what? Believe me, this is a good thing.
• With these settings, certain common errors will cause the script to immediately fail, explicitly and loudly. Otherwise, you can get hidden bugs that are discovered only when they blow up in production.

• set -euxo pipefail is short for:

set -e
set -u

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#!/bin/bash

####
# Split MySQL dump SQL file into one file per table
# based on http://blog.tty.nl/2011/12/28/splitting-a-database-dump
# TO be tested
####

if [ $# -lt 1 ] ; then
  echo "USAGE $0 DUMP_FILE [TABLE]"

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version: '3.7'
services:
  traefik:
    image: traefik:v2.2.0
    ports:
      - "${FRONT_HTTP_PORT:-80}:80"
      # - "${TRAEFIK_PORT:-8080}:8080"
    environment: 
      # - TRAEFIK_LOG_LEVEL=DEBUG
      - TRAEFIK_PROVIDERS_DOCKER_EXPOSEDBYDEFAULT=false

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Traefik: redirect base or root path to a subpath

This is tested with Traefik 1.7

This is how to redirect the root or base path to a sub path in Traefik using Docker labels:
Goals

• https://example.com -> https://example.com/abc/xyz/
• https://example.com/ -> https://example.com/abc/xyz/
• https://example.com/something -> no redirect

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if [ ! -f .env ]
then
  export $(cat .env | xargs)
fi

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#!/bin/bash 

# https://cloud.google.com/compute/docs/faq#find_ip_range
# nslookup -q=TXT _cloud-netblocks.googleusercontent.com  8.8.8.8

myarray=()
for LINE in `dig txt _cloud-netblocks.googleusercontent.com +short | tr " " "\n" | grep include | cut -f 2 -d :`
do
	myarray+=($LINE)
	for LINE2 in `dig txt $LINE +short | tr " " "\n" | grep include | cut -f 2 -d :`

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Steps to Install Kubernetes on CentOS7 with Kubeadm and vSphere

1. On the master node: Edit the vsphere.conf file within the kubeadm-master.sh to match your environment. Copy kubeadm-master.sh to the master node:

sudo chmod u+x kubeadm-master.sh
sudo ./kubeadm-master.sh

2. On each worker node copy kubeadm-worker.sh:

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autoload -U compinit colors vcs_info
colors
compinit

REPORTTIME=3
HISTFILE=~/.zhistory
HISTSIZE=5000
SAVEHIST=5000
setopt INC_APPEND_HISTORY
setopt EXTENDED_HISTORY

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release(){
#!/bin/bash

# current Git branch
branch=$(git symbolic-ref HEAD | sed -e 's,.*/\(.*\),\1,')

# v1.0.0, v1.5.2, etc.
versionLabel=v$1

# establish branch and tag name variables