[users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Stephen Liu 
Hi all,

I have following problem:

Host   Ubuntu 14.04 desktop
VMs   Ubuntu 14.04 desktop/server edition
VirtualBox

I have several web-servers running on VMs, each with its own domain/subdomain 
and internal IP address.  But I have only one Fixed IP/External IP. 

All VMs are Apache server running WordPress.  I can create many internal IPs on 
router.
Please advise how can I make all web-servers be browsed on Internet
Thanks in advance.
Regardssatimis

Re: [users@httpd] 回覆︰ [users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Marat Khalili 
Have no experience with HA Proxy, sorry. Your task can be solved with 
plain Apache, information about using one as reverse proxy is easier to 
find.


--

With Best Regards
Marat Khalili

On 25/12/15 18:44, Stephen Liu wrote:

Hi Marat,

Thanks for your advice.  I suppose you referred to HA Proxy
HAProxy
http://www.haproxy.org/

I'm now busily googling on document re its setup on domain base.  Can 
you help?  Thanks


Regards
Stephen L


Marat Khalili  於 2015年12月25日 (週五) 11:31 PM 寫道﹕



Reverse proxy running on host may be the answer. It may
discriminate sites by domain name and redirect requests to
corresponding virtual hosts.

--

With Best Regards
Marat Khalili

On 25/12/15 18:11, Stephen Liu wrote:

Hi all,

I have following problem:

Host   Ubuntu 14.04 desktop
VMs   Ubuntu 14.04 desktop/server edition
VirtualBox

I have several web-servers running on VMs, each with its own
domain/subdomain and internal IP address.  But I have only one
Fixed IP/External IP.

All VMs are Apache server running WordPress.  I can create many
internal IPs on router.

Please advise how can I make all web-servers be browsed on Internet

Thanks in advance.

Regards
satimis

[users@httpd] 回覆︰ [users@httpd] 回覆︰ [users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Stephen Liu 
Hi, Marat,
Whether following document is good for me to follow;
Building Apache for Proxying
http://www.apachetutor.org/admin/reverseproxies
?

Thanks
RegardsStephen L

|   |
|   |   |   |   |   |
| Running a Reverse Proxy with Apache:As with any modules, the first thing to 
do is to load them in httpd.conf (this is not necessary if we build them 
statically into Apache).  |
|  |
| 查看於 www.apachetutor.org | Yahoo 預覽 |
|  |
|   |

 

Marat Khalili  於 2015年12月26日 (週六) 12:01 AM 寫道﹕
 
 

  Have no experience with HA Proxy, sorry. Your task can be solved with plain 
Apache, information about using one as reverse proxy is easier to find.
 
 --
 
 With Best Regards
 Marat Khalili  
  On 25/12/15 18:44, Stephen Liu wrote:
  
  Hi Marat, 
  Thanks for your advice.  I suppose you referred to HA Proxy HAProxy
 http://www.haproxy.org/ 
  I'm now busily googling on document re its setup on domain base.  Can you 
help?  Thanks 
  Regards Stephen L
  
 
  Marat Khalili  於 2015年12月25日 (週五) 11:31 PM 寫道﹕
  
 
 
Reverse proxy running on host may be the answer. It may discriminate sites 
by domain name and redirect requests to corresponding virtual hosts.
 
  --
 
 With Best Regards
 Marat Khalili
 
   On 25/12/15 18:11, Stephen Liu wrote:
  
  Hi all,
 
 I have following problem:
 
 Host   Ubuntu 14.04 desktop
 VMs   Ubuntu 14.04 desktop/server edition
 VirtualBox
 
 I have several web-servers running on VMs, each with its own domain/subdomain 
and internal IP address.  But I have only one Fixed IP/External IP. 
 
 All VMs are Apache server running WordPress.  I can create many internal IPs 
on router. 
  Please advise how can I make all web-servers be browsed on Internet 
  Thanks in advance. 
  Regards satimis

Re: [users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Marat Khalili 
Reverse proxy running on host may be the answer. It may discriminate 
sites by domain name and redirect requests to corresponding virtual hosts.


--

With Best Regards
Marat Khalili

On 25/12/15 18:11, Stephen Liu wrote:

Hi all,

I have following problem:

Host   Ubuntu 14.04 desktop
VMs   Ubuntu 14.04 desktop/server edition
VirtualBox

I have several web-servers running on VMs, each with its own 
domain/subdomain and internal IP address.  But I have only one Fixed 
IP/External IP.


All VMs are Apache server running WordPress.  I can create many 
internal IPs on router.


Please advise how can I make all web-servers be browsed on Internet

Thanks in advance.

Regards
satimis

Re: [users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Nick Kew 
On Fri, 25 Dec 2015 15:11:13 + (UTC)
Stephen Liu  wrote:

> Hi all,
> 
> I have following problem:
> 
> Host   Ubuntu 14.04 desktop
> VMs   Ubuntu 14.04 desktop/server edition
> VirtualBox
> 
> I have several web-servers running on VMs, each with its own
> domain/subdomain and internal IP address.  But I have only one Fixed
> IP/External IP. 
> 
> All VMs are Apache server running WordPress.  I can create many
> internal IPs on router. Please advise how can I make all web-servers
> be browsed on Internet Thanks in advance.

This may be an issue for your networking config.
That is to say, check what networking options your
OS and VM environment provide.

If you can't find a native solution, you could run
an apache instance on your external IP, with a 
VirtualHost proxying to each of the VMs.

Of course, if you could dispense with the VMs and
substitute plain old VirtualHosts, that's a far more
efficient solution.

-- 
Nick Kew

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[users@httpd] 回覆︰ [users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Stephen Liu 
Hi Marat,
Thanks for your advice.  I suppose you referred to HA ProxyHAProxy
http://www.haproxy.org/
I'm now busily googling on document re its setup on domain base.  Can you help? 
 Thanks
RegardsStephen L
 

Marat Khalili  於 2015年12月25日 (週五) 11:31 PM 寫道﹕
 
 

  Reverse proxy running on host may be the answer. It may discriminate sites by 
domain name and redirect requests to corresponding virtual hosts.
 
  --
 
 With Best Regards
 Marat Khalili
 
  On 25/12/15 18:11, Stephen Liu wrote:
  
  Hi all,
 
 I have following problem:
 
 Host   Ubuntu 14.04 desktop
 VMs   Ubuntu 14.04 desktop/server edition
 VirtualBox
 
 I have several web-servers running on VMs, each with its own domain/subdomain 
and internal IP address.  But I have only one Fixed IP/External IP. 
 
 All VMs are Apache server running WordPress.  I can create many internal IPs 
on router. 
  Please advise how can I make all web-servers be browsed on Internet 
  Thanks in advance. 
  Regards satimis

Re: [users@httpd] 回覆︰ [users@httpd] 回覆︰ [users@httpd] How to solve ONE fixed IP serving multiple web-servers running on VMs

2015-12-25 Thread Marat Khalili 
Looks ok at first glance.

--

With Best Regards
Marat Khalili

On December 25, 2015 7:17:47 PM GMT+03:00, Stephen Liu 
 wrote:
>Hi, Marat,
>Whether following document is good for me to follow;
>Building Apache for Proxying
>http://www.apachetutor.org/admin/reverseproxies
>?
>
>Thanks
>RegardsStephen L
>
>|   |
>|   |   |   |   |   |
>| Running a Reverse Proxy with Apache:As with any modules, the first
>thing to do is to load them in httpd.conf (this is not necessary if we
>build them statically into Apache).  |
>|  |
>| 查看於 www.apachetutor.org | Yahoo 預覽 |
>|  |
>|   |
>
> 
>
>Marat Khalili  於 2015年12月26日 (週六) 12:01 AM 寫道﹕
> 
> 
>
>Have no experience with HA Proxy, sorry. Your task can be solved with
>plain Apache, information about using one as reverse proxy is easier to
>find.
> 
> --
> 
> With Best Regards
> Marat Khalili  
>  On 25/12/15 18:44, Stephen Liu wrote:
>  
>  Hi Marat, 
>  Thanks for your advice.  I suppose you referred to HA Proxy HAProxy
> http://www.haproxy.org/ 
>I'm now busily googling on document re its setup on domain base.  Can
>you help?  Thanks 
>  Regards Stephen L
>  
> 
>  Marat Khalili  於 2015年12月25日 (週五) 11:31 PM 寫道﹕
>  
> 
> 
>Reverse proxy running on host may be the answer. It may discriminate
>sites by domain name and redirect requests to corresponding virtual
>hosts.
> 
>  --
> 
> With Best Regards
> Marat Khalili
> 
>   On 25/12/15 18:11, Stephen Liu wrote:
>  
>  Hi all,
> 
> I have following problem:
> 
> Host   Ubuntu 14.04 desktop
> VMs   Ubuntu 14.04 desktop/server edition
> VirtualBox
> 
>I have several web-servers running on VMs, each with its own
>domain/subdomain and internal IP address.  But I have only one Fixed
>IP/External IP. 
> 
>All VMs are Apache server running WordPress.  I can create many
>internal IPs on router. 
>  Please advise how can I make all web-servers be browsed on Internet 
>  Thanks in advance. 
>  Regards satimis
>   
>  
>   
> 
>  
> 
> 
> 
>
>

[users@httpd] Re: AH00273: apr_proc_mutex_lock failed, possibly caused by cron, systemd or su

2015-12-25 Thread Mark Ziesemer 
Rainer Canavan  sevenval.com> writes:

> we've got an obscure problem with the apache httpd that was shipped
> with CentOS 7.2. We perform automatic builds and updates via cron,
> and, since the update to CentOS 7.2. The update script is triggered by
> cron and stops, yum updates and starts the httpd. When the next cron
> job that is run as the same user as the httpd (not the update job)
> terminates, the httpd frequently fails, starting with a AH00273:
> apr_proc_mutex_lock failed message, and then a never ending loop of
> AH00272 messages, one from each httpd process that is forked, until
> the listener process is stopped.
 
> Does anyone have any ideas what may cause these mutex errors?

Sorry - no ideas, but I'm having the exact same issue, and have been trying
for the better part of a week to figure out what is causing this.

My symptoms are identical, albeit with a slightly different execution path.
 I'm running the packaged and OS-provided httpd, but executed as an
alternate service account with a provided configuration directory (httpd -d
/opt/app/myApp/httpd).  This works for at least days on-end without issue. 
I then added a logrotate cron job, executing as the same user, with a
postrotate command to run "/usr/sbin/httpd -d /opt/app/myApp/httpd -k
graceful".  Once executed through cron, I see exactly the same issue that
you are.  If I execute directly in a bash shell of the service account
without cron, I can repeatedly execute without any concerns.

I tried a compile-from-source HTTPD (2.4.18), suspecting something amiss
with the CentOS-provided HTTPD - but still experienced the exact same issue.

So cron appears to be a common factor here.  My only work-around so far has
been to disable the logrotate cron job.

I've run multiple instances of similar configurations previously without
issue, and am not exactly sure what has changed to cause this in my new
builds.  I am curious if this is new to CentOS 7.2, or possibly 7.1.

I had suspected SELinux.  I tried setting the SELINUX=permissive in
/etc/sysconfig/selinux and rebooting, but still experienced the same issue.

I created a 2nd CentOS VM, installed and configured identically - and as of
yet, have been unsuccessful in re-creating the issue there.  The only
outstanding significant difference I can think of (outside of the server and
user names used) is that it is largely a default HTTP configuration - where
the problem instance has SSL and a minimal ProxyPass configuration running.
 I guess I'll try to clone these configurations over next to see if they
make any difference.

For completeness (from the VM where I am experiencing the issue):

$ cat /etc/centos-release
CentOS Linux release 7.2.1511 (Core)

$ uname -srvmpio
Linux 3.10.0-327.3.1.el7.x86_64 #1 SMP Wed Dec 9 14:09:15 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux



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