| # | |
| # This is the ultimate HAProxy 2.0 "Getting Started" config | |
| # It demonstrates many of the features available which are now available | |
| # While you may not need all of these things, this can serve | |
| # as a reference for your own configurations. | |
| # | |
| # Have questions? Check out our community Slack: | |
| # https://slack.haproxy.org/ | |
| # |
Let's assume we have following line in our HA proxy file:
reqrep ^([^\ :]*)\ /api/v1/api-name/(.*) \1\ /staging/path-name/\2
Here is our sample domain:
https://example.com/api/v1/api-name/
The goal here is to rewrite /api/v1/api-name/ to /staging/path-name/ leaving anything else unchanged.
Breaking the Regex and understanding in parts:
There are basically 3 parts in the regex:
| Copyright 2022 Peter Malmgren | |
| Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OT |
| 0. pxname [LFBS]: proxy name | |
| 1. svname [LFBS]: service name (FRONTEND for frontend, BACKEND for backend, | |
| any name for server/listener) | |
| 2. qcur [..BS]: current queued requests. For the backend this reports the | |
| number queued without a server assigned. | |
| 3. qmax [..BS]: max value of qcur | |
| 4. scur [LFBS]: current sessions | |
| 5. smax [LFBS]: max sessions | |
| 6. slim [LFBS]: configured session limit | |
| 7. stot [LFBS]: cumulative number of connections |
| #!/bin/bash | |
| # Parameters | |
| socket="/run/foo.sock" | |
| dump="/tmp/capture.pcap" | |
| # Extract repetition | |
| port=9876 | |
| source_socket="$(dirname "${socket}")/$(basename "${socket}").orig" |
| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
| RAGEL=ragel | |
| JAVAC=javac | |
| default: generate | |
| generate: lexer_java.rl | |
| $(RAGEL) -J lexer_java.rl -o LexerJava.java | |
| compile: LexerJava.java |
As configured in my dotfiles.
start new:
tmux
start new with session name:
| #!/bin/bash | |
| # This script analyses the log files /var/log/auth.log* for | |
| # illegal break-in attempts and writes all output to $logdir. | |
| # <http://blog.philippklaus.de/2010/02/analyse-illegal-ssh-login-attempts/#comment-12211> | |
| # inspired by <http://goo.gl/QMOhiU> | |
| # and <http://filipivianna.blogspot.com/2009/10/checking-authlog-for-ssh-brute-force.html> | |
| logbasedir=~/logs |