DanyC97

#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which

DanyC97

---
AWSTemplateFormatVersion: 2010-09-09
Description: Copy tags from EC2 to associated resources

Resources:

  Role:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:

DanyC97

function decode-authorization-failure-message {
    if [ $# -ne 1 ] || [ "$1" = -h ] || [ "$1" = --help ]; then
        cat <<'EOT'
Usage: decode-authorization-failure-message <message>

Use this when Amazon gives you an "Encoded authorization failure message" and
you need to turn it into something readable.
EOT
        return 1
    fi

DanyC97

# shortform git commands
alias g='git'

# pretty tab'd git log
git log --graph --pretty="tformat:%h*(%ar)*<%an>*%d %s" $* | sed -Ee 's/(^[^<]*) ago\)/\1)/' | sed -Ee 's/(^[^<]*), [[:digit:]]+ .*months?\)/\1)/' | column -s '*' -t | cat

# change author of all git repos
git filter-branch -f --env-filter "GIT_AUTHOR_NAME='yourname'; GIT_AUTHOR_EMAIL='[email protected]'; GIT_COMMITTER_NAME='yourname'; GIT_COMMITTER_EMAIL='[email protected]';" HEAD;

# stage only deleted files

DanyC97

Generating CloudFormation Templates from YAML Dictionaries

The security group and Network ACLs parts of CloudFormation templates can be difficult to read. This template containing Jinja macros converts easier-to-read YAML dictionaries of security group and NACL rules into JSON.

Here ais a generic macro template and some example files showing how to use it.

• cloudformation.macros.j2 - the macros
• cf_vars.yml - YAML dictionaly of security groups and NACLs, including some complex rules for both
• test.template.j2 - a simple CloudFormation template that uses the macro file
• cf_test.yml - a simple Ansible playbook that generates CloudFormation JSON from thr previous file.

DanyC97

Tabs and Windows

Function	Shortcut
Fullscreen	⌘+ Enter
Previous Tab	⌘+ Left Arrow
Next Tab	⌘+ Right Arrow
Go to Tab	⌘ + Number
Go to Window	⌘ + Option + Number
Go to Split Pane by Direction	⌘ + Option + Arrow

DanyC97

Libvirt

yum group install -y "Development Tools"
yum -y install qemu-kvm libvirt virt-install bridge-utils libvirt-devel  libxslt-devel libxml2-devel libvirt-devel libguestfs-tools-c

echo "net.ipv4.ip_forward = 1"|sudo tee /etc/sysctl.d/99-ipforward.conf
sysctl -p /etc/sysctl.d/99-ipforward.conf

DanyC97

AWS CloudFormation YAML template - appending to list parameter types

Documenting this here, as I often forget (what I have found) is the best way to do this at the moment.

For example, you have a list of two existing security groups given to a stack and wish to create (and use) a third - attaching all to an ALB:

AWSTemplateFormatVersion: "2010-09-09"
Description: "Example template"

Parameters:

DanyC97

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

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# ------------------------------------
# Docker alias and function
# ------------------------------------

# Get latest container ID
alias dl="docker ps -l -q"

# Get container process
alias dps="docker ps"