Development, Analysis And Research
by Andrew Johnstone
Archive for the ‘General’ Category
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 preinstall as such transferring any files that conflict with the packages configuration files, apt-get will prompt regardless of DEBIAN_FRONTEND=noninteractive. Not ideal if your trying to [...]
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- Tags: apt-get, Bash, non-interactive
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 request. The table’s purpose is to allow Apache modules to communicate. if (function_exists(‘apache_note’)) { if (isset($_SESSION) && !empty($_SESSION)) { apache_note(‘session_id’, session_id()); apache_note(‘users_id’, isset($_SESSION['users_id'])? $_SESSION['users_id'] : [...]
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- Tags: Apache, Apache Logs, Graphite, Logster, LogTailer, PHP, Python
Vagrant is simply a wrapper around Virtualbox headless that allows for provisioning virtual machines with support for puppet, chef-solo, chef, and bash. This allows you to automate the deployment and sandboxing of development sites. Additional base box images can be found at vagrantbox.es. Installing Vagrant apt-get install -y ruby1.9.1 ruby1.9.1-dev ln -svf /usr/bin/ruby1.9.1 /etc/alternatives/ruby gem [...]
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- Tags: Bash, MySQL, PHP, Slack, Virtualbox, Virtualization
A little while ago, I did an internal presentation on selenium at Everlution. I’ve put this on slideshare, which can be found here. The key problem to entry is simply getting people to record the actions and the issues they are reporting. I often find trying to reproduce the problem on complex software can take [...]
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- Tags: PHPUnit, Saucelabs, Selenium
This is something I commonly have to run and always seem to forget. In order to run unattended. Java 6 installation on Ubuntu add-apt-repository “deb http://archive.canonical.com/ $(lsb_release -s -c) partner” apt-get update echo “sun-java6-jdk shared/accepted-sun-dlj-v1-1 select true” | debconf-set-selections echo “sun-java6-jre shared/accepted-sun-dlj-v1-1 select true” | debconf-set-selections DEBIAN_FRONTEND=noninteractive aptitude install -y -f sun-java6-jre sun-java6-bin sun-java6-jdk Java [...]
Memcached multigets – ubuntu vs debian
14 Jun 2011I Spent a little while yesterday investigating why memcached causes problems with multigets returning results and ended up comparing debian vs ubuntu. I tested from virtual machines and physical hardware of relative specs. I have also tried a combination of libmemcached libraries and tuned the tcp stack, however here are some of the results from [...]
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- Tags: Debian, Memcached, PHP, Ubuntu
Currently I have been trying to migrate a 4 node production MySQL database to a blade G5/G7 with vmware ubuntu instances on top of netapp. Typically I would not use a virtual machine nor try to run MySQL on top of NFS, however this needs to fit within the clients infrastructure. Baseline Base line performance [...]
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- Tags: Blade Datacenters, MySQL, NetApp
One of our clients Gorkana was bought by Durrants. As such I have been working on integrating and merging data. As a result I wrote a script to synchronize data between MySQL and Oracle, which is presently a one way synchronization. The implementation The script(s) to synchronize data was broken into a few scripts. Automatically [...]
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- Tags: MySQL, Networking, Oracle, PHP, VPN
Server hacked: exim4 — arbitrary code execution
18 Dec 2010One of our servers was hacked, 5 days after a Debian Security Advisory. The exploit was executed in two phases, the first to gain access to the system and the second to escalate privileges. The exploit used targeted Exim with a memory corruption issue that allowed a remote attacker to execute arbitrary code as the [...]
EC2 Tools Installation: AMI, API, Elastic Load Balancing (ELB), Auto Scaling and Cloud Watch
In: General
16 Jan 2010Updated bash script 23/01/2010: The script was assumed to run from EC2 itself, however I have since modified this so its applicable to local environments and made a little more robust. There are quite a number of new tools from EC2, each requiring some form of setup on the server. As a result I have [...]
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Andrew Johnstone is a software engineer / lead developer working at Everlution Software.
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- John Cannon: Hey that was really needful. Thanks for sharing. I'll surely be looking for more. [...]
- apt-get unattended / non-interactive installation | Development, Analysis And Research: [...] previously wrote about “Installing Java & MySQL – unattended/non-interactive insta [...]
- franck: http://en.wikipedia.org/wiki/FreeBSD_jail [...]
- franck: That web server should not live in such close proximity to that SMTP server... chroot/jail may be th [...]
- Vagrant – Automating PHP Installation with bash/slack for continuous deployment | Development, Analysis And Research: [...] More examples of installing MySQL unattended can be found at Installing Java & MySQL – u [...]
- apt-get unattended / non-interactive installation
- PHP apache_note, Graphite & Logster for logging
- Vagrant – Automating PHP/MySQL Installation with bash/slack for continuous deployment
- PHP5.3 autoload/class_exists fail
- Selenium
- Installing Java & MySQL – unattended/non-interactive installation
- Memcached multigets – ubuntu vs debian
- Optimizing and testing MySQL over NFS with NetAPP
- MySQL oddity with disappearing body of stored procedures
- MySQL to Oracle synchronization using PHP over VPNC