Squids
From Wikitech
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==Logs== | ==Logs== | ||
| − | Currently on [[yongle]] in /var/backup/archiv | + | Currently on [[yongle]] in /var/backup/archiv, and/or on [[zwinger]] in /home/wikipedia/logs/archiv/ |
Revision as of 14:17, 17 July 2004
DNS and squid
- to add new IPs for squid:
- add the IPs in /var/named/master/wikipedia.zone in the obvious places (on zwinger)
- make sure to update the serial number in the zone file!
- run rndc reload to make it update - no need to restart named
- for 3 squids - use 6 IPs, to allow even load-balancing if 1 or 2 squids go down
- 2 scripts in /home/wikipedia/bin:
- takeip
-
dropip(vapourware)
- some useful commands:
- dig ANY en.wikipedia.org @zwinger.wikipedia.org
- dig +short ANY en.wikipedia.org
Virtual IPs
browne: 207.142.131.235, 207.142.131.247 coronelli: 207.142.131.236, 207.142.131.248 maurus: 207.142.131.245, 207.142.131.246
- According to damyta, should use 255.255.255.255 for netmask for the IPs of virtual eth interfaces - otherwise there can be routing confusion.
- You must ping through the switch via a virtual interface which you have just brought up (using ping -I), to update the switch's idea of who has what IP. When pinging with -I207.142.131.248 or similar, use suda as the ping target; pinging the broadcast address does not always work.
- Can use script takeip in /h/w/bin to take over an IP if a squid goes down.
- To take down a virtual eth interface, /sbin/ifconfig eth0:n down
- TODO: set up heartbeat for automatic IP takeover.
Logs
Currently on yongle in /var/backup/archiv, and/or on zwinger in /home/wikipedia/logs/archiv/
