DevOps

Running things in production: automation, deployments, monitoring, configuration management and the boring-but-critical operational glue.

206 posts on DevOps.

2026-06

2026-06-09 Transcribing my old podcast locally with open-source AI

2020-07

2020-07-09 Recap: measuring linux performance - how to avoid typical mistakes
2020-07-08 How to measure Linux Performance Avoiding Most Typical Mistakes: Network
2020-07-06 How to measure Linux Performance Avoiding Most Typical Mistakes: Memory
2020-07-02 How to measure Linux Performance Avoiding Most Typical Mistakes: Disk Storage

2020-06

2020-06-30 Adding SWAP to Linux
2020-06-29 How to measure Linux Performance Avoiding Most Typical Mistakes: CPU
2020-06-29 Git commit without the pre-commit hook
2020-06-04 Making life easier with cron

2020-05

2020-04

2020-04-29 Build & test your Laravel project via Bitbucket Pipelines
2020-04-27 Deploying a highly-available K3s with K3sup
2020-04-26 Set up a custom 404 page for static sites with Caddy 2
2020-04-26 Different ways of writing crontab syntax
2020-04-26 Clean up Linux Server Using These Simple Tips
2020-04-10 How to run HTTP/3 with Caddy 2
2020-04-10 Migrating to Caddy 2

2020-01

2020-01-17 Dumping specific tables in MySQL using mysqldump
2020-01-13 Auto-restart a crashed service in systemd

2019-12

2019-12-19 Name your Laravel Horizon workers for easier debugging at the CLI
2019-12-05 Set up a static IP address on Ubuntu 18.04 LTS server

2019-11

2019-11-27 VirtualBox: Failed to open/create the internal network 'HostInterfaceNetworking-en0' (VERR_SUPDRV_COMPONENT_NOT_FOUND)
2019-11-27 Auto-start VirtualBox VMs (headless) after reboot on Mac OSX
2019-11-21 Mac OS: xcrun: error: invalid active developer path, missing xcrun
2019-11-19 Specify a specific SSH private key for git pull/git clone
2019-11-15 Analysing webservers logs locally with goaccess
2019-11-08 Disable HTTP sessions in Laravel to speed up your API

2019-10

2019-10-03 A github CI workflow tailored to modern PHP applications (Laravel, Symfony, …)

2019-07

2019-07-10 Trigger an on demand uptime & broken links check after a deploy with the Oh Dear! API

2019-05

2019-05-01 I forgot how to manage a server

2019-04

2019-04-22 Requesting certificates with Let’s Encrypt’s official certbot client

2019-03

2019-03-24 Archiving the bitcoin-dev mailing lists
2019-03-19 MySQL 8 & Laravel: The server requested authentication method unknown to the client

2018-12

2018-12-12 Our Gitlab CI pipeline for Laravel applications – Oh Dear! blog
2018-12-04 Deploying laravel-websockets with Nginx reverse proxy and supervisord
2018-12-04 Benchmarking websocket server performance with Artillery

2018-11

2018-11-29 Increase the number of open files for jobs managed by supervisord
2018-11-07 Automatic monitoring of Laravel Forge managed sites with Oh Dear!
2018-11-06 How to size & scale your Laravel Queues
2018-11-04 Laravel Telescope: Data too long for column ‘content’

2018-10

2018-10-10 MySQL 8 removes shorthand for creating user + permissions

2018-09

2018-03

2018-03-28 It’s about what broke, not who broke it
2018-03-27 Why I usually run ‘w’ first when troubleshooting unknown machines
2018-03-19 The security footgun in etcd
2018-03-15 Enable the slow log in Elastic Search
2018-03-11 Laravel & MySQL auto-adding “on update current_timestamp()” to timestamp fields

2018-02

2018-02-20 Update a docker container to the latest version

2017-10

2017-10-15 Get shell in running Docker container
2017-10-04 Laravel Forge + Envoyer + Managed Hosting = Nucleus

2017-09

2017-08

2017-08-18 MariaDB: JSON datatype supported as of 10.2

2017-07

2017-07-17 mysqldump without table locks (MyISAM and InnoDB)

2017-06

2017-06-20 MariaDB MaxScale 2.1 defaulting to IPv6

2017-04

2017-04-24 cron.weekly issue #77: OpenStack, Moby, Caddy, Devuan, Linuxkit, Tmux, Jenkins & more
2017-04-19 DNS Spy has launched!

2017-03

2017-03-20 cron.weekly issue #72: FreeBSD, lkml, llvm, dnscontrol, buck, ReOpenLDAP, Postfix, Bash, Xargs & more
2017-03-16 Finding the biggest data (storage) consumers in Zabbix
2017-03-06 cron.weekly issue #70: GitHub, Kompose, Usql, tmux-cssh, HAProxy, icdiff, GlusterFS & more
2017-03-02 Podcast: Config Management Camp: Kubernetes, Sysdig & Mgmt
2017-03-01 DNS Spy enters public beta

2017-02

2017-02-09 Introducing Docker Secrets Management

2017-01

2017-01-16 Google Infrastructure Security Design Overview
2017-01-11 A collection of Drupal Drush one liners and commands

2016-12

2016-12-19 In virtual environments, less (CPU’s) is more

2016-10

2016-10-30 Run Nginx proxy in Docker container for HTTP/2

2016-08

2016-08-09 Docker Cheat Sheet
2016-08-08 Podcast: Ansible config management & deploying code with James Cammarata

2016-07

2016-07-26 Why do we automate?

2016-06

2016-06-03 I started a podcast for sysadmins and developers: SysCast

2016-05

2016-05-16 Redis: OOM command not allowed when used memory > ‘maxmemory’
2016-05-06 Podcast: Devops, SSL & HTTP2 op HTTP Café

2016-04

2016-04-19 Staying up-to-date on open source announcements & security issues via Twitter

2016-03

2016-02

2016-02-23 MongoDB performance tuning with ‘dex’

2016-01

2016-01-25 Coming soon: SysCast
2016-01-12 Apache 2.4 AH01762 & AH01760: failed to initialize shm (Shared Memory Segment)
2016-01-03 The best tech question to ask in a job interview
2016-01-02 apachectl on Linux: get the entire Apache vhost configuration in one output

2015-12

2015-12-29 Very simple ‘git push’ workflow to deploy code on your own server
2015-12-09 MySQL: Convert a table from MyISAM to InnoDB or vica versa

2015-11

2015-11-23 What is a 'unikernel'?
2015-11-17 Querying JSON data at the command line with ‘jq’
2015-11-06 Simulate low-bandwidth conditions with Chrome’s network throttling
2015-11-03 Auto resize screen size for Windows 10 guest VMs in Virtualbox

2015-09

2015-09-28 The Otto Project: Meet the Successor to Vagrant

2015-08

2015-07

2015-07-26 This American Life: The DevOps Episode
2015-07-20 The Worst Possible DevOps Advice

2015-06

2015-06-18 Increasing Nginx Performance With Thread Pooling
2015-06-18 How SSH In Windows Server Completely Changes The Game

2015-05

2015-05-21 rtop: Remote System Monitoring Via SSH
2015-05-09 Under The Hood: Facebook’s Cold Storage System
2015-05-02 Using Webserver Access Logs As A Database Storage System

2015-04

2015-04-29 Increase open-files-limit in MariaDB on CentOS 7 with systemd
2015-04-23 Using Zabbix To Notify If Your Site/Domain Makes It To The HackerNews Frontpage
2015-04-20 Nginx Open Sources TCP Load Balancing
2015-04-16 HTTP/1 vs HTTP/2 Page Loading
2015-04-16 Open Source Puppet 4 Released
2015-04-14 Taking Netflix's Vector (Performance Monitoring Tool) For A Spin
2015-04-08 Microsoft’s Nano Server & Hyper-V Containers
2015-04-03 Hosting Superheroes
2015-04-01 µPuppet & Ensible

2015-03

2015-03-22 Life Without Ops

2015-02

2015-02-17 Giving HTTPie a Chance
2015-02-14 Three Tiers of Package Managers
2015-02-02 Fosdem 2015 Notes
2015-02-01 What's New in systemd, 2015 Edition
2015-02-01 Live Migrations for Containers with CRIU
2015-02-01 Docker Storage Performance Tests

2015-01

2015-01-29 My Fosdem 2015 Schedule
2015-01-18 The Frontpage of Hacker News: Stats, Graphs & Some Analysis
2015-01-15 Does SPDY (or HTTP/2) Actually Help?
2015-01-06 Flush all the content from Memcached via the CLI

2014-12

2014-12-30 The (unexpected?) workload associated with migrating to HHVM
2014-12-22 Replacing Software Stacks Is Never The Solution
2014-12-17 Azure Cloud Outage Root Cause Analysis
2014-12-08 Apache’s mod_fastcgi and mod_deflate troubles
2014-12-03 Automating the Unknown

2014-11

2014-11-30 The Next-Generation PHP Server Stack For 2015
2014-11-27 Test Gzip Compression of Site via Curl
2014-11-24 Debugging Performance Problems With Zabbix Internal Items
2014-11-23 CPU Flame Graphs
2014-11-23 Enable MySQL’s slow query log without a restart
2014-11-19 The PHP circle: from Apache to Nginx and back
2014-11-18 Make HTTPerf use a proxy for connections
2014-11-18 Follow-up: 3 years of automation with Puppet
2014-11-17 3 Years of Puppet Config Management: lessons learned
2014-11-13 Microsofts Open Source Strategy
2014-11-12 Benchmarking the performance of ‘Wordfence’, a WordPress plugin
2014-11-09 Behind the scenes at World of Warcraft: the datacenter tech

2014-10

2014-10-03 Sysdig CLI examples

2014-06

2014-06-30 PHP-FPM environment variables are limited to 1024 chars

2014-04

2014-04-13 Follow-up: use ondemand PHP-FPM masters using systemd
2014-04-09 A better way to run PHP-FPM

2013-05

2013-05-29 Read all keys & values from a Memcached instance
2013-05-15 Setting custom puppet facts from within your Vagrantfile

2013-02

2013-02-20 Gearman Queue error: mysql_stmt_execute failed: Unknown prepared statement handler (1)

2012-07

2012-07-24 Prevent cronjobs from overlapping in Linux
2012-07-02 CentOS 6: /usr/sbin/qpidd eating up all CPU (at 100%)
2012-07-02 A fix for the Java Leap Second bug

2012-06

2012-05

2012-05-09 Autoloading MIB files in client SNMP configuration on Linux

2012-04

2012-04-20 MySQL error: table is marked as crashed and should be repaired

2012-03

2012-03-01 Remove a single mail from the postfix queue on Linux

2012-02

2012-02-26 Incoming bandwidth limitation on OpenVZ with CentOS 6.x running on VMware ESX(i)
2012-02-24 On removing users with %postun in RPM SPEC files
2012-02-20 Setting up a catch-all e-mail account on Linux using Postfix
2012-02-18 Hide PHP errors and log them to a file or syslog (php-fpm or mod_php)

2011-11

2011-11-19 Fixing MySQL master-slave replication upon query error
2011-11-19 MySQL purge the binary logs from replication (mysql-bin.xxxx files)
2011-11-17 VMWare ESXi 4.1 Update 2: warning: syslog not configured

2011-07

2011-07-25 Windows Virtuozzo: unable to copy registry key on container start
2011-07-02 Checking for MySQL optimizations via scripts

2011-04

2011-04-21 Amazon EC² downtime: a collection of horror stories

2011-03

2011-03-03 Profiling: Learning from Engadget's infrastructure on traffic spike handling (ie: iPad2 launch)

2011-02

2011-02-28 CentOS, Apache & mod_fcgid: IPCCommTimeout not working as expected
2011-02-03 CentOS, Heartbeat, DRBD & NFS: umount failed, device is busy

2010-12

2010-11

2010-10

2010-10-22 Advanced Monitoring Of HAProxy With Zabbix Agent
2010-10-13 Let Plesk Create Zend Directories Whenever A Physical Hosting (domain) Is Added

2010-09

2010-09-30 Maximizing PHP's Mail Throughput: To Fork Or Not To Fork?
2010-09-19 MoZBX: The Mobile Zabbix Client
2010-09-12 My BarCamp Antwerp Presentation: “High Availability in IT = AAARGH”
2010-09-07 Compile HAProxy With TPROXY Support
2010-09-01 Compile a (CentOS) Kernel And IPTables With TPROXY Support

2010-08

2010-08-26 Exclude Local Networks Via Juniper NetScreen-Remote VPN
2010-08-14 Facebook’s Techtalks Worth Watching
2010-08-07 MySQL Upgrade To 5.1: Database Name Prefix #mysql50#

2010-07

2010-07-31 Deploying Undersea Cables: Laying The Internet’s Backbone
2010-07-30 System Administrator Appreciation Day 2010 @ Nucleus
2010-07-06 How, What and Why – On Scalability, Availability & Manageability (Facebook)

2010-02

2010-02-23 “Show Full Processlist;” Equivalent Of MySQL For PostgreSQL

2009-07

2009-07-31 System Administrator Appreciation Day @ Nucleus = Win
2009-07-30 Why We Deserve Our System Administration Appreciation Day

2009-04

2009-04-29 Webcast: Database Sharding at Netlog with MySQL and PHP
2009-04-15 Case Insensitive Table And Column Names In MySQL

2009-03

2009-03-11 Connect SQL Server Management Studio Express To Alternate TCP Port

2008-11

2008-11-23 Permanent Failure – Probe failed: Illegal To: address (invalid domain name)

2008-10

2008-10-13 Explaining Port Forwarding & Routing To A Novice
2008-10-09 How The Internet Works – Peering & Transit

2008-09

2008-09-03 Easiest Way To Create A MySQL Database Copy

2008-07

2008-07-21 Controlling the San Fransisco Computer Network – The Powers Of A SysAdmin
2008-07-16 Installing SQL 2000 and SQL 2005 on the same server
2008-07-13 Stress test your windows server

2008-06

2008-06-13 A technical look at Myspace’s growth
2008-06-03 ThePlanet datacenter nog steeds offline
2008-06-02 Google opens up
2008-06-01 And all the UPS’ in the world …