| Version 49 (modified by chris, 3 years ago) (diff) |
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Table of Contents
Puffin
puffin.webarch.net is a 4GB RAM, 14 CPU core Debian Squeeze virtual server which replaced NewLiveServer and DevelopmentServer for running the Transition Network Drupal sites. It went live in early 2013.
This server is due to be upgraded from LennyToSqueeze on ticket:535 in May 2013.
It was agreed to call this server puffin at the ttech meeting on 22nd November 2012, see ticket:463. The install and initial configuration of this server was tracked on ticket:466, see also the other PuffinServer#migrationtickets. Other services from the old server were migrated to PenguinServer.
Munin Stats
There are munin stats for the server available here
See ticket:555#comment:13 for the notes regarding the installation of the mysql munin stats package.
Console Access
There is a Xen shell available for console access, see wiki:XenShell.
Barracuda Octopus Ageir
The server is using Octopus to manage Ageir and also the updates to the Transition Network Drupal site, this system is installed and upgraded using Barracuda, the Barracuda Octopus Aegir combination is documented on the BOA wiki.
The BOA install script output has been saved on ticket:466#comment:22
php-fpm
Please note that the version of php-fpm that the http://transitionnetwork.org/ site needs to be running to work properly is:
/etc/init.d/php53-fpm
The config file for it is /opt/local/etc/php53-fpm.conf and when it is running it is listed in top and ps as php-fpm:
ps -lA | grep php 1 S 0 29482 1 0 80 0 - 188067 - ? 00:00:00 php-fpm 5 S 33 29483 29482 2 80 0 - 205351 - ? 00:01:32 php-fpm 5 S 33 29484 29482 2 80 0 - 199726 - ? 00:01:28 php-fpm ...
Please note the settings that we changed from the default BOA ones in /opt/local/etc/php53-fpm.conf below.
When the server boots another version of php-fpm starts, which is listed in top and ps as php5-fpm, this one:
/etc/init.d/php5-fpm
Which is configured via files in /etc/php5/fpm/. This version should be stopped if it is found to be running:
/etc/init.d/php5-fpm stop
Upgrading BOA
The steps are documented in UPGRADE.txt, to upgrade everything run these commands, this process can take around 30 mins:
sudo -i cd wget -q -U iCab http://files.aegir.cc/BOA.sh.txt bash BOA.sh.txt barracuda up-stable octopus up-stable all
To get the nginx and php-fpm munin stats working the following code starting with the comment needs adding to /var/aegir/config/server_master/nginx.conf in the nginx default server section:
#######################################################
### nginx default server
#######################################################
server {
limit_conn gulag 32; # like mod_evasive - this allows max 32 simultaneous connections from one IP address
listen *:80;
server_name _;
location / {
root /var/www/nginx-default;
index index.html index.htm;
}
## chris
location /nginx_status {
stub_status on;
access_log off;
allow 127.0.0.1;
allow 81.95.52.103;
deny all;
}
location ~ ^/(status|ping)$ {
fastcgi_pass 127.0.0.1:9090;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_intercept_errors on;
include fastcgi_params;
access_log off;
allow 127.0.0.1;
deny all;
}
}
And the following lines need uncommenting in /opt/local/etc/php53-fpm.conf:
pm.status_path = /status ping.path = /ping
Also the following lines are changed from the default BOA settings (see ticket:555 for the notes on this):
emergency_restart_threshold = 0 emergency_restart_interval = 0 pm.max_children = 90 pm.start_servers = 20 pm.min_spare_servers = 10 pm.max_spare_servers = 20 pm.max_requests = 0
After the edits above have been made nginx and php-fpm need restarting:
/etc/init.d/php53-fpm reload /etc/init.d/nginx restart
Best check the error log:
tail -f /var/log/php/php53-fpm-error.log
These fixes can be tested like this:
cd /etc/munin/plugins munin-run phpfpm_connections munin-run phpfpm_status munin-run nginx_status munin-run nginx_request
These settings in /etc/mysql/my.cnf are changed from the default and need checking after each upgrade:
max_connections = 75 max_user_connections = 75
To disable the clobbering of log files two shell scripts need editing and some lines commenting out (see ticket:555#comment:22):
vim /var/xdrago/graceful.sh /var/xdrago/clear.sh :1,$s/echo rotate/# echo rotate/gc
To adjust the restarting of nginx and the killing of nginx and php-fpm under heave loads edit /var/xdrago/second.sh changing these values (see ticket:563#comment:9):
CTL_ONEX_SPIDER_LOAD=1552 CTL_FIVX_SPIDER_LOAD=1552 CTL_ONEX_LOAD=5776 CTL_FIVX_LOAD=3552 CTL_ONEX_LOAD_CRIT=7552 CTL_FIVX_LOAD_CRIT=6220
Upgrade tickets:
- BOA-2.0.9 ticket:547
- BOA-2.0.8 ticket:530
- BOA-2.0.7 ticket:529
- ticket:466#comment:26
System Updates
Don't use the regular debian tools for updating packages, do this:
barracuda up-stable system
After running the above command to update the system you also need to follow the steps documented above at PuffinServer#UpgradingBOA for php-fpm to get the Munin stats working again.
See also ticket:548#comment:33 for the steps that need to be followed after this to get BOA to work with the Session443 plugin.
CSF / LDF
BOA installs CSF / LDF and automatically blocks IP addresses after too many failed SSH login attempts, if someone is blocked who shouldn't be then they can be unblocked like this:
csf -dr 12.34.56.78
To check if a IP address is blocked:
csf -g 12.34.56.78
See this ticket for problems caused by CSF / LDF blocking the monitoring server: ticket:544
Backupninja
backupninja has been installed and configured to backup to another server in the Sheffield colo, three backup tasks have been configured in /etc/backup.d/, 10.sys which does backups of system settings, like all the packages installed, 20.mysql which dumps all the mysql databases into /var/backups/mysql and uses /etc/mysql/debian.cnf for authentication and finally 90.rdiff which is set to backup all these directories:
include = /var/spool/cron/crontabs include = /var/backups include = /var/aegir include = /etc include = /root include = /home include = /usr/local/ include = /var/lib/dpkg/status* include = /opt include = /srv include = /data exclude = /home/*/.gnupg exclude = /home/*/.local/share/Trash exclude = /home/*/.Trash exclude = /home/*/.thumbnails exclude = /home/*/.beagle exclude = /home/*/.aMule exclude = /home/*/gtk-gnutella-downloads exclude = /var/cache/backupninja/duplicity
Postfix
Two changes were made the the default postfix install, it was set to send root emails out, see ticket:466#comment:23 and it was configured to use TLS with the transition network cert, see ticket:466#comment:25.
Nginx
The only changes made to the default nginx configuration was to move the key and cert it was using out of the way and symlink to the *.transitionnetwork.org ones, see ticket:466#comment:25.
Handy commands
There are some Bash aliases to quickly get around the system added by JK...
For root:
alias cdtn='cd /data/disk/tn/' # cd to tn directory
alias totn='su -s /bin/bash tn' # log into the tn user
# show file usages
alias duf='du -sk * | sort -n | perl -ne '\''($s,$f)=split(m{\t});for (qw(K M G)) {if($s<1024) {printf("%.1f",$s);print "$_\t$f"; last};$s=$s/1024}'\'
For tn
alias la='ls -Al --color=auto' alias lc='ls -ltcr --color=auto' alias lk='ls -lSr --color=auto' alias ll='ls -la --group-directories-first --color=auto' alias lr='ls -lR --color=auto' alias ls='ls -hF --color=auto' alias lt='ls -ltr --color=auto' alias lu='ls -ltur --color=auto' alias lx='ls -lXB --color=auto'
Vim config
To make vim the default editor for root the following was added to /root/.bashrc:
export EDITOR="vim"
To make config files nicer to read in vim the following was added to /root/.vimrc:
syntax on
And a /root/.vim/filetype.vim files was created with the following in it:
au BufRead,BufNewFile /etc/mysql/my.cnf, set ft=mycnf autocmd BufRead,BufNewFile /etc/php5/fpm/* set syntax=dosini autocmd BufRead,BufNewFile /opt/local/etc/php53-fpm.conf set syntax=dosini au BufRead,BufNewFile /etc/nginx/*,/etc/nginx/conf.d/*,/var/aegir/config/server_master/nginx/*/* set ft=nginx au BufRead,BufNewFile /data/disk/tn/config/server_master/nginx/vhost.d/* set ft=nginx
And a /root/.vim/syntax/ directory was created and mycnf.vim was created in it by downloading it from http://cvs.pld-linux.org/cgi-bin/cvsweb.cgi/packages/vim-syntax-mycnf/ and nginx.vim was downloaded from http://www.vim.org/scripts/script.php?script_id=1886
Migration Tickets
Tickets created during the migration of the http://www.transitionnetwork.org/ site from NewLiveServer to this server:
- ticket:466 Puffin install and configuration
- ticket:472 Script to copy files from NewLiveServer to puffin
- ticket:479 Transfer live transitionnetwork.org site to puffin
- ticket:480 Transfer news.transitionnetwork.org to puffin
- ticket:483 Nginx 502 Bad Gateway Errors with BOA see the summary on ticket:483#comment:46
- ticket:487 robots.txt files for development sites
