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by Andrew Johnstone

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Amazon ELB – monitoring packet count and byte size with Amazon Cloudwatch and VPC flow logs

andrew.johnstone December 16, 2015 Amazon ELB – monitoring packet count and byte size with Amazon Cloudwatch and VPC flow logs2015-12-16T05:30:53+00:00 AWS No Comment
We recently exceeded the capacity for one of our Amazon ELBs in a 60 second period. One of the points of our debrief was to monitor the network from the ELB.…
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SSL – Amazon ELB Certificates

andrew.johnstone June 20, 2015 SSL – Amazon ELB Certificates2015-06-20T23:19:35+00:00 No Comment
I always forget the order to concatenate SSL certificates and to upload to Amazon ELBs as well as commands to verify SSL certificates. Extract dates from certificate echo | openssl…
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Automatically update Amazon ELB SSL Negotiation Policies

andrew.johnstone May 31, 2015 Automatically update Amazon ELB SSL Negotiation Policies2015-06-01T08:56:16+00:00 No Comment
A quick script to update Amazon ELB SSL Negotiation policies for all Amazon ELBs. The security policies are managed from Amazon and will only update the predefined security policies, choosing…
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Amazon Opsworks – Dependent on Monit

andrew.johnstone October 17, 2014 Amazon Opsworks – Dependent on Monit2014-10-17T20:45:38+00:00 AWS 1 Comment
I recently converted a number Amazon Opsworks instances to be time based, so that they shut down at the end of the working day. After doing so, I kept seeing…
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Awk craziness: Processing log files

andrew.johnstone April 13, 2013 Awk craziness: Processing log files2014-07-09T21:55:44+00:00 No Comment
A while back I wrote an awk script to process a custom log file to work out how an application was performing over a period of time. The following script…
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Elastic Search Presentation

andrew.johnstone October 29, 2012 Elastic Search Presentation2014-07-09T21:52:32+00:00 No Comment
I’ve implemented a number of sites with Elastic Search and recently had a two-day spike to implement Elastic Search for Photobox’s backoffice systems. As a result I have since wrote…
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Requests per second from Apache logs

andrew.johnstone September 22, 2012 Requests per second from Apache logs2014-07-10T20:54:20+00:00 1 Comment
Whilst recently looking into usage of SSL, I needed to analyse some logs from apache to determine requests per second. Initially I wrote a quick bash script to do this,…
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Hackday @ Everlution

andrew.johnstone July 25, 2012 Hackday @ Everlution2014-07-09T21:14:15+00:00 No Comment
At Everlution we did a hack day to help motivate developers and to get the team working together. We started at and finished at 5pm. It was pretty impressive what…
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apt-get unattended / non-interactive installation

andrew.johnstone January 19, 2012 apt-get unattended / non-interactive installation2014-07-09T21:04:32+00:00 Linux 1 Comment
I previously wrote about “Installing Java & MySQL – unattended/non-interactive installation”. Whilst using slack, I have been running apt-get during postinstall rather than preinstall. Files are transferred from slack after…
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PHP apache_note, Graphite & Logster for logging

andrew.johnstone January 9, 2012 PHP apache_note, Graphite & Logster for logging2014-07-09T20:58:21+00:00 1 Comment
A nice tip for logging data against apache logs within requests. Apache_note is a wrapper for Apache’s table_get and table_set. It edits the table of notes that exists during a…
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Recent Posts

  • Amazon ELB – monitoring packet count and byte size with Amazon Cloudwatch and VPC flow logs
  • SSL – Amazon ELB Certificates
  • Automatically update Amazon ELB SSL Negotiation Policies
  • Amazon Opsworks – Dependent on Monit
  • Awk craziness: Processing log files

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