Re: Second apache as fallback server (Apache Users)

Bob,

simple diagram for what you are looking for:

http://www.1stserv.com/images/Load-balancer-Setup1.png

And here is a more detailed document:

https://f5.com/resources/white-papers/load-balancing-101-nuts-and-bolts

If you're using MS Windows Server to host your Apache Servers you can look into using Microsoft NLB. It's a low cost solution that works fine and does not require any extra HW:

https://technet.microsoft.com/en-us/library/cc725691.aspx

About your questions:

>What can be done to assure the high-availability of the reverse proxy itself ?

User redundant LBs or MS NLB.

>What about the latency if the master and hot standby located in two different data center

I don't have that scenario so can't help you much with this question.

If you are looking into geographically distribute your application I would suggest the DNS route:

https://www.digitalocean.com/community/tutorials/how-to-configure-dns-round-robin-load-balancing-for-high-availability

Cheers,

John

On Mon, Feb 15, 2016 at 9:33 AM, Bob <bobnlinux@xxxxxxxxx> wrote:

Hello John,

Could you please give me some more clue / pointers/ link ?

Please allow me repeating my questions again

What can be done to assure the high-availability of the reverse proxy itself ?
What about the latency if the master and hot standby located in two different data center ?

On Monday 15 February 2016 09:02 AM, Meta Correio wrote:

We have it implemented using and external, redundant , load balancer.
It really comes down to your budget.

John

On Mon, Feb 15, 2016 at 8:58 AM, Bob <bobnlinux@xxxxxxxxx> wrote:

Hello,

Thanks for the valuable suggestions.

What can be done to assure the high-availability of the reverse proxy itself ?
What about the latency if the master and hot standby located in two different data center ?

On Sunday 14 February 2016 10:43 PM, Yehuda Katz wrote:

We use three different methods:
1. Content on NFS server
2. Content auto-committing and auto-pulling over git about every 15 minutes
3. Separate database server - with replication for backup.

- Y

Sent from a device with a very small keyboard and hyperactive autocorrect.

On Feb 14, 2016 5:28 PM, "Rose, John B" <jbrose@xxxxxxx> wrote:

What is your preferred approach to keeping content in sync?

Sent from my iPad

On Feb 14, 2016, at 3:47 PM, Daniel <dferradal@xxxxxxxxx> wrote:

with a reverse proxy in front of both, you use balancer setup specifying the second web server as hot standby

El dom., 14 feb. 2016 a las 16:49, Bob (<bobnlinux@xxxxxxxxx>) escribió:

Hello list,

I have two servers. One is already up with apache, mysql etc..
Now I wonder if I can configure the second server as a fallback web server.
The idea is.. if first web server is down , the second one will serve
the requests.

Any suggestion / idea is very much welcome.

Thanks and regards,
Bob

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