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Quickly bootstrap a Squid Proxy Server on Amazon EC2

June 13, 2018 - Reading time: ~1 minute

Squid is the ubiquitituos proxy server, there just isnt any competetion :)

Quickly bootstrap a Squid Proxy Server on Amazon EC2 with this UserData/Bootstrp script:

#!/bin/bash
#Squid user-data.sh
yum update -y
yum install -y squid
mkdir /var/log/squid3/
mkdir /var/spool/squid3/
chown squid /var/log/squid3/ -R
chown squid /var/spool/squid3/ -R

cat > /etc/squid/squid.conf << EOF
# Local network access to proxy
#Recommended minimum configuration:
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl localnet src 0.0.0.0/8 10.76.0.0/16 10.78.0.0/16 
acl SSL_ports port 443
acl Safe_ports port 80      # http
acl Safe_ports port 21      # ftp
acl Safe_ports port 443     # https
acl Safe_ports port 70      # gopher
acl Safe_ports port 210     # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280     # http-mgmt
acl Safe_ports port 488     # gss-http
acl Safe_ports port 591     # filemaker
acl Safe_ports port 777     # multiling http

acl CONNECT method CONNECT

http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports

http_access deny to_localhost
icp_access deny all
htcp_access deny all

http_port 3128
hierarchy_stoplist cgi-bin ?
access_log /var/log/squid3/access.log squid

#Suggested default:
refresh_pattern ^ftp:       1440    20% 10080
refresh_pattern ^gopher:    1440    0%  1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern .       0   20% 4320
# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid3

# Allow all machines to all sites
http_access allow all 

EOF

service squid start
chkconfig squid on

Docker Image for Bamboo Build Agent

June 13, 2018 - Reading time: ~1 minute

A basic Dockerfile for Bamboo agent

FROM atlassian/default-image
RUN curl -sO https://releases.hashicorp.com/packer/1.2.3/packer_1.2.3_linux_amd64.zip
RUN echo 822fe76c2dfe699f187ef8c44537d10453a1545db620e40b345cf6991a690f7d packer_1.2.3_linux_amd64.zip  | sha256sum --status -c -
RUN unzip packer_1.2.3_linux_amd64.zip -d /usr/local/bin/
RUN apt-get -q update && apt-get -q -y install python-pip rubygems-integration
RUN pip install awscli
RUN wget https://github.com/stedolan/jq/releases/download/jq-1.5/jq-linux64
RUN echo c6b3a7d7d3e7b70c6f51b706a3b90bd01833846c54d32ca32f0027f00226ff6d jq-linux64 | sha256sum --status -c -
RUN chmod +x jq-linux64 && sudo mv jq-linux64 /usr/local/bin/jq

Alert on a new EC2 instance creation...

June 6, 2018 - Reading time: 353 minutes

I created new notification system in AWS to alert us when a new instance is created in the account.

Infrastructure details

A new CloudWatch rule is created:

This invokes a Lambda function InvokeCreationNotifier.

The lambda function parses the event and sent an email through SNS:

Octopus Deploy is a neat product...

June 5, 2018 - Reading time: 270 minutes

I really like Octopus Deploy, have used it at a Client for deploying .Net applications and I like the visibility it provides for the CD side of the DevOps process.