Development, Analysis And Research
by Andrew Johnstone
Archive for the ‘Linux’ Category
I previously wrote about “Installing Java & MySQL β 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
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 [...]
Setting up an FTP Server with ProFTPD on EC2
In: Linux
17 Jul 2010Itβs very rare that I setup FTP servers on our production environments and always forget parts of the configuration, so figured I would list it here. Active and Passive FTP There are two types of modes active and passive FTP, using normal or passive FTP, a client initiates a session by sending a request to [...]
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- Tags: EC2, FTP
Recently I started migrating an old server, which had skip-networking within my.cnf, which is not a dynamic option and requires you to restart the mysql server. I typically rsync the source code and static data to a new machine. Configure the webserver with the relevant vhosts and change the database connection details to point to [...]
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- Tags: Linux, MySQL
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Andrew Johnstone is a software engineer / lead developer working at Everlution Software.
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- apt-get unattended / non-interactive installation | Development, Analysis And Research: [...] previously wrote about “Installing Java & MySQL β 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 β u [...]
- Can the NIC ucarp uses be bridged? - Admins Goodies: [...] http://ajohnstone.com/achives/running-several-vips-on-the-same-interface-with-ucarp-and-haprox [...]
- 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