Vladyslav V. Prodan click0
marcusphi
/ ansible_conditionals_examples.yaml
Created
October 2, 2013 09:48
Ansible 1.3 Conditional Execution -- Very complete example with comments -- I find the conditional expressions to be ridiculously hard to get right in Ansible. I don't have a good model of what's going on under the surface so I often get it wrong. What makes it even harder is that there has been at least three different variants over the course …
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| --- | |
| # This has been tested with ansible 1.3 with these commands: | |
| # ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=false" | |
| # ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=true" | |
| # ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts" | |
| # NB: The type of the variable is crucial! | |
| - name: Ansible Conditionals Examples | |
| hosts: $hosts | |
| vars_files: |
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| #!/bin/bash | |
| DBSTATUS=$(sqlite3 "$1" "PRAGMA integrity_check") | |
| if [ "$DBSTATUS" == "ok" ] ; then | |
| echo DB ALREADY OK | |
| else | |
| echo FIXING CORRUPT DB | |
| TMPDB=$(mktemp -t sarim) | |
| echo ".mode insert | |
| .dump" | sqlite3 "$1" > $TMPDB |
dmytro
/ ssh-multi.sh
Created
October 31, 2012 03:46
Start multiple synchronized SSH connections with Tmux
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| #!/bin/bash | |
| # ssh-multi | |
| # D.Kovalov | |
| # Based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html | |
| # a script to ssh multiple servers over multiple tmux panes | |
| starttmux() { | |
| if [ -z "$HOSTS" ]; then |
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| 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 |
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| /*********************************************************************** | |
| * connect.c -- Make socket connection using SOCKS4/5 and HTTP tunnel. | |
| * | |
| * Copyright (c) 2000-2004 Shun-ichi Goto | |
| * Copyright (c) 2002, J. Grant (English Corrections) | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License | |
| * as published by the Free Software Foundation; either version 2 | |
| * of the License, or (at your option) any later version. |
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