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cg2112
Joined: 11 Jul 2008
Posts: 7
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| Posted: Tue Dec 08, 2009 8:55 pm Post subject: IP faillover |
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Anyone know exactly how the IP Failover option works (or how I can get it to work). I have two linodes...one has two public IP addresses.
I want one of those IP addresses to fail over to the other linode when necessary.
I've been beating myself up with linux-ha (another drama altogether), and I thought I'd take a break from that and just see if the IP address would work on the second server. So far, manually assigning the IP to an interface doesn't work at all.
Any ideas? |
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BarkerJr
Joined: 02 Aug 2009
Posts: 220
Location: Connecticut, USA
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| Posted: Tue Dec 08, 2009 10:21 pm Post subject: |
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I assume that you did check the IP in the IP Failover Configuration page in the Network tab, right?
Here's what I do in a minutely cron job on both servers:
Code: ping -c 5 -w 30 74.207.247.xxx > /dev/null
if [ $? -eq 1 ]
then
echo 'No response from main IP... Adding IP to eth0...'
ip address add 74.207.247.xxx/24 dev eth0
arping -UI eth0 -qc 5 74.207.247.xxx
fi |
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cg2112
Joined: 11 Jul 2008
Posts: 7
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| Posted: Wed Dec 09, 2009 8:55 am Post subject: |
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That's essentially what I was doing, with no luck.
It appears that a reboot is necessary once you give a linode permission to use an IP address from another. I rebooted, everything works fine now.
Still a little disappointed that linux-ha won't work right, but I'll get something figured out now that this is working. Thanks. |
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ohkus
Joined: 13 Jun 2008
Posts: 59
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| Posted: Wed Dec 09, 2009 10:10 am Post subject: |
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cg2112 wrote: That's essentially what I was doing, with no luck.
It appears that a reboot is necessary once you give a linode permission to use an IP address from another. I rebooted, everything works fine now.
Still a little disappointed that linux-ha won't work right, but I'll get something figured out now that this is working. Thanks.
Try this out, been using it for years for ip failover.
http://www.linux-ha.org/ |
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cg2112
Joined: 11 Jul 2008
Posts: 7
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| Posted: Wed Dec 09, 2009 10:53 am Post subject: |
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I'm not having any luck with linux-ha.
The two sides don't see each other for some reason. I'll get it eventually, I just don't have time to mess with it right now. |
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nfn
Joined: 21 Jan 2009
Posts: 89
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| Posted: Wed Dec 09, 2009 11:24 am Post subject: |
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Hello,
Have you ever evaluate a Dns failover solution like Dns Made Easy or Postpart?
I never used one but would like to understand if its a valid solution.
Postpart even has Geo Redundancy. |
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BarkerJr
Joined: 02 Aug 2009
Posts: 220
Location: Connecticut, USA
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| Posted: Wed Dec 09, 2009 1:12 pm Post subject: |
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| I host DNS on each of my three servers and have them ping each-other every 15 mins and update the DNS zone appropriately. Works for me :) |
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