You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@tomcat.apache.org by Alan Chandler <al...@chandlerfamily.org.uk> on 2006/02/12 18:07:06 UTC
Setting up a parallel test environment on the same machine as main server
I have a setup on my home web site that consists of apache2 front ending
Tomcat 4.1, connected via jk_mod. Both software packages actually sit on the
same machine, which is the gateway between the WAN and my LAN, and has two
Ethernet Cards The external web site (www.chandlerfamily.org.uk) has the WAN
address, my other addresses are several IP addresses from the 192.168.0.0
range, all simultaneously served off the LAN side interface. An internal dns
allocates lan addresses with names of the form *.home
At the current time, the definition of all the jk directives is held in a file
called jk.conf, which is included into the apache configuration at a global
level (ie outside any virtual hosts directives). There is a single
workers.properties file which defines a worker called tomcat sitting on
appserv.home (one of the ip addresses refered to in the first paragraph)
There is a single JkMountFile directive inside the jk.conf file that refers to
a urimap.properties file that maps what gets mapped to be served by the
tomcat worker and what gets mapped to be served as static content.
I want to set up a testing environment in apache such that prior to new
versions of the application going live, I would like to run them in some form
of test mode in a separate (apache) virtual host. I will use the name
test.home which is yet another ip address on this same box for the apache
virtual host. I am doing that so I can access the same database engine (also
on this machine) [Full testing on a separate machine will have happened
first, so this not as daft as it might seem]
Unless anyone here can suggest a better way, I would like to move the
JkMountFile directive from global scope to virtual host scope and have two
separate files urimap files so that I can map different things dependent on
which virtual host.
However, since this is a live site I don't want to just conduct the simple
experiment to see if will work, so I am asking here if this is OK.
Although this is a simplistic approach, the downside seems to be that unless I
also separate tomcat into two separate virtual hosts I cannot use the same
servlet name for both production and test instances of my application.
However, I don't fully understand the relationship between <service>, <engine>
and <host> stanza's in the server.xml file, and until I do, I am reluctant to
muck about with it and potentially screw the currently working arrangement.
Can I ask, am I right in thinking...
<server> and <engine> have a one to one mapping and effectively map on to a
single IP address assigned to the server (although it never seems to be
specified directly as it gets picked up from one of the defaulthost
attribute), and that each <host> represents a single name from the dns that
maps onto that IP address. Therefore there may be several host stanza's but
all hosts must have the same IP address.
However I am confused about workers and the jvmRoute attribute on the <engine>
tag. Inside the workers.properties file you define the host for a given
instance of a worker. Therefore, how to the workers get mapped on to the
virtual hosts?
In otherwords, in order to separate namespaces for my apache virtual hosts'
connection to tomcat do I need one or two <server/engine> stanza's mapped to
one or two separate <host>
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: Setting up a parallel test environment on the same machine as main server
Posted by Tim Lucia <ti...@yahoo.com>.
I believe you need to have a virtual host in Tomcat for each one on Apache.
I also believe that the name of the workers is irrelevant, as is the IP
address over which they communicate -- as long as the servers are bound to
the right address(es). All differentiation takes place on the host header
only.
The https part (having to use Ips) is unfamiliar to me (I have one site on
my server running secure, and that works fine.)
Someone else feel free to jump in here and correct me if I am wrong.
Tim
> > So, you should have two virtual hosts (by name) in both
> server.xml and
> > httpd.conf. Not sure how to solve the https problem --
> never tried to
> > myself.
>
> This is where I get lost. I currently have two virtual hosts
> on apache
> pointing at the same virtual host on tomcat ALL with
> different names - so
> this doesn't square with what you are saying of there being
> a one to one
> mapping.
>
> This server is running linux, with two ethernet cards. On the
> WAN side (which
> is what you can see) my ISP allocated via dhcp a single IP
> address. That is
> the www.chandlerfamily.org.uk address. On the lan side, I can
> allocate
> multiple IP addresses to the card in a set of "psuedo
> devices", so at the
> moment it has address 192.168.0.20 and 192.168.0.30, 31, 32
> and 39. Each of
> these is given separate names such as roo.home, appserv.home,
> webmail.home
> money.home and test.home by a nameserver also running on that machine
>
> On apache I have a number of virtual hosts set up (but
> because of the https
> problem they MUST be differenciated by ip address). At the
> moment I have the
> virtual hosts www.chandlerfamily.org.uk and money.home
> directing traffic to
> tomcat on the host appserv.home (the home page you saw was
> being generated in
> a java application).
>
> I want to add a tomcat host to serve java applications to an
> apache virtual
> host running on test.home. If I understand you correctly you
> would advocate
> creating additional <host> elements of my server.xml file
> with names of
> www.chandlerfamily.org.uk and test.home (I presume I have to
> keep default
> host of appserv.home just so that tomcat knows which ip
> address to listen
> on). If I do that how do I pick up traffic to money.home?
> add another <host>
> statement with repeated contexts?
>
>
>
> --
> Alan Chandler
> http://www.chandlerfamily.org.uk
> Open Source. It's the difference between trust and antitrust.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Setting up a parallel test environment on the same machine as main server
Posted by Alan Chandler <al...@chandlerfamily.org.uk>.
On Wednesday 15 February 2006 01:13, Tim Lucia wrote:
> The http host header is sent by the user-agent ("browser") based on the
> address requested in the URL. This is how virtual hosts are
> differentiated. Tomcat supports a <host> container for virtual host
> differentiation, just like Apache does. You do not need to change the
> workers at all. Tomcat sees the same host header that Apache does. I.e.,
> using Tamper Data and FireFox, I see
>
> Host=www.chandlerfamily.org.uk
Yes - I get that part.
>
> When I request your web site. (Along with a photo of you, presumably, in a
> tie & sunglasses ;-) You might also want to send just "Apache" for the
> server, rather then
Yes its me (although they are my normal glasses that I wear all the time -
they just have light sensitive lenses), taken at my daughters graduation from
Southampton University in the summer 2004 :-)
>
> Server=Apache/2.0.54 (Debian GNU/Linux) mod_auth_pgsql/2.0.2b1 DAV/2
> SVN/1.1.4 mod_jk/1.2.14 mod_python/3.1.3 Python/2.3.5 PHP/4.3.10-16
> mod_ssl/2.0.54 OpenSSL/0.9.7e mod-xslt/1.0.0rc1
>
> As it is "more secure". How to do this was recently discussed on this
> list.
Low priority - but I'll look at it.
>
> So, you should have two virtual hosts (by name) in both server.xml and
> httpd.conf. Not sure how to solve the https problem -- never tried to
> myself.
This is where I get lost. I currently have two virtual hosts on apache
pointing at the same virtual host on tomcat ALL with different names - so
this doesn't square with what you are saying of there being a one to one
mapping.
This server is running linux, with two ethernet cards. On the WAN side (which
is what you can see) my ISP allocated via dhcp a single IP address. That is
the www.chandlerfamily.org.uk address. On the lan side, I can allocate
multiple IP addresses to the card in a set of "psuedo devices", so at the
moment it has address 192.168.0.20 and 192.168.0.30, 31, 32 and 39. Each of
these is given separate names such as roo.home, appserv.home, webmail.home
money.home and test.home by a nameserver also running on that machine
On apache I have a number of virtual hosts set up (but because of the https
problem they MUST be differenciated by ip address). At the moment I have the
virtual hosts www.chandlerfamily.org.uk and money.home directing traffic to
tomcat on the host appserv.home (the home page you saw was being generated in
a java application).
I want to add a tomcat host to serve java applications to an apache virtual
host running on test.home. If I understand you correctly you would advocate
creating additional <host> elements of my server.xml file with names of
www.chandlerfamily.org.uk and test.home (I presume I have to keep default
host of appserv.home just so that tomcat knows which ip address to listen
on). If I do that how do I pick up traffic to money.home? add another <host>
statement with repeated contexts?
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: Setting up a parallel test environment on the same machine as main server
Posted by Tim Lucia <ti...@yahoo.com>.
The http host header is sent by the user-agent ("browser") based on the
address requested in the URL. This is how virtual hosts are differentiated.
Tomcat supports a <host> container for virtual host differentiation, just
like Apache does. You do not need to change the workers at all. Tomcat
sees the same host header that Apache does. I.e., using Tamper Data and
FireFox, I see
Host=www.chandlerfamily.org.uk
When I request your web site. (Along with a photo of you, presumably, in a
tie & sunglasses ;-) You might also want to send just "Apache" for the
server, rather then
Server=Apache/2.0.54 (Debian GNU/Linux) mod_auth_pgsql/2.0.2b1 DAV/2
SVN/1.1.4 mod_jk/1.2.14 mod_python/3.1.3 Python/2.3.5 PHP/4.3.10-16
mod_ssl/2.0.54 OpenSSL/0.9.7e mod-xslt/1.0.0rc1
As it is "more secure". How to do this was recently discussed on this list.
So, you should have two virtual hosts (by name) in both server.xml and
httpd.conf. Not sure how to solve the https problem -- never tried to
myself.
Hope this is helpful,
Tim
-----Original Message-----
From: Alan Chandler [mailto:alan@chandlerfamily.org.uk]
Sent: Tuesday, February 14, 2006 3:09 PM
To: users@tomcat.apache.org
Subject: Re: Setting up a parallel test environment on the same machine as
main server
On Tuesday 14 February 2006 12:36, Tim Lucia wrote:
> 1. Moving the JkMount directive inside a <VirtualHost...> will make it
> accesible from only that virtual host. So, you must repeat common
> ones, such as /jkmanager. I put the mappings (JkMount(s)) right in
> the virtual host definition(s) with no trouble at all.
Thanks - just what I needed confirmation on
>
> 2. The virtual host is determined by the http host header, not by the
> connector host name. This is true for both httpd and tomcat (and any
> other web server.)
Not sure I understand what you are mean here by "http host header", isn't
that
the name of the web site that I am accessing (ie as known by apache) rather
than as known by a backend topcat
At the moment, I have apache, with two virtual host names of
home.chandlerfamily.org.uk (also known as www.chandlerfamily.org.uk) (ip
address of my WAN)
money.home (ip address of 192.168.0.32)
based on ip addressing only (ie not named virtual hosts - because it also
needs to support https where named virtual hosts are not supported)
which all end up using tomcat services for parts of the web site (urls as
defined in JkMountFile). It is all directed to a single tomcat host via a
single worker.properties file with the following
worker.list=tomcat
worker.tomcat.type=ajp13
worker.tomcat.host=appserv.home
worker.tomcat.port=8009
worker.tomcat.connect_timeout=10
and a single host on the server.xml line defined as
appserv.home
This appserv.home (ip address 192.168.0.31) is certainly currently getting
all
the traffic it should get from apache - but I don't see how that is related
to the http host in the header.
BUT ...
Do you mean that if I had changed my workers thusly
worker.list=production,test
worker.production.host=prodserv.home
worker.test.host=testserv.home
... for the other parameters
but where both prodserv.home, and testserv.home had the SAME ip address (say
127.0.0.1 :-) )
AND i add an apache virtual host of test.home (ip address 192.168.0.39)
That I can differenciate them in the server.xml file by having an engine
running of localhost, but with two hosts with names of prodserv.home and
testserv.home respectively, and that provided the JkMountFile was then moved
into the correct apache virtual host context, then the same url could be
mapped by one apache virtual host to worker production and the other apache
virtual host could map to worker test.
I could then have different versions of the same app running on production
and
test.
>
> You can always install Apache httpd + Tomcat on a second machine (or
> on the same machine on a separate set of ports), if you are reluctant
> to try it on you production host.
>
> HTH,
> Tim
>
>
> -----Original Message-----
> From: Alan Chandler [mailto:alan@chandlerfamily.org.uk]
> Sent: Tuesday, February 14, 2006 3:50 AM
> To: users@tomcat.apache.org
> Subject: Re: Setting up a parallel test environment on the same
> machine as main server
>
>
> On Sunday 12 February 2006 17:07, Alan Chandler wrote:
> ...
>
> > Unless anyone here can suggest a better way, I would like to move
> > the JkMountFile directive from global scope to virtual host scope
> > and have two separate files urimap files so that I can map different
> > things dependent on which virtual host.
> >
> > However, since this is a live site I don't want to just conduct the
> > simple experiment to see if will work, so I am asking here if this
> > is OK.
>
> Is there really nobody on this list who can answer this simple
> question?
>
> ...
>
> > However, I don't fully understand the relationship between
> > <service>, <engine> and <host> stanza's in the server.xml file, and
> > until I do, I am reluctant to muck about with it and potentially
> > screw the currently working arrangement.
>
> Specifically, there was some conversation here about it best that if
> tomcat was running on the same box as the web server (which it is in
> my case) that it would be best to make the connection between apache2
> and tomcat be via localhost. That being the case, how can I map the
> SAME servlet name but from a different virtual host (albeit ip based)
> on apache to DIFFERENT hosts on the same tomcat engine.
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Setting up a parallel test environment on the same machine as main server
Posted by Alan Chandler <al...@chandlerfamily.org.uk>.
On Tuesday 14 February 2006 12:36, Tim Lucia wrote:
> 1. Moving the JkMount directive inside a <VirtualHost...> will make it
> accesible from only that virtual host. So, you must repeat common ones,
> such as /jkmanager. I put the mappings (JkMount(s)) right in the virtual
> host definition(s) with no trouble at all.
Thanks - just what I needed confirmation on
>
> 2. The virtual host is determined by the http host header, not by the
> connector host name. This is true for both httpd and tomcat (and any other
> web server.)
Not sure I understand what you are mean here by "http host header", isn't that
the name of the web site that I am accessing (ie as known by apache) rather
than as known by a backend topcat
At the moment, I have apache, with two virtual host names of
home.chandlerfamily.org.uk (also known as www.chandlerfamily.org.uk) (ip
address of my WAN)
money.home (ip address of 192.168.0.32)
based on ip addressing only (ie not named virtual hosts - because it also
needs to support https where named virtual hosts are not supported)
which all end up using tomcat services for parts of the web site (urls as
defined in JkMountFile). It is all directed to a single tomcat host via a
single worker.properties file with the following
worker.list=tomcat
worker.tomcat.type=ajp13
worker.tomcat.host=appserv.home
worker.tomcat.port=8009
worker.tomcat.connect_timeout=10
and a single host on the server.xml line defined as
appserv.home
This appserv.home (ip address 192.168.0.31) is certainly currently getting all
the traffic it should get from apache - but I don't see how that is related
to the http host in the header.
BUT ...
Do you mean that if I had changed my workers thusly
worker.list=production,test
worker.production.host=prodserv.home
worker.test.host=testserv.home
... for the other parameters
but where both prodserv.home, and testserv.home had the SAME ip address (say
127.0.0.1 :-) )
AND i add an apache virtual host of test.home (ip address 192.168.0.39)
That I can differenciate them in the server.xml file by having an engine
running of localhost, but with two hosts with names of prodserv.home and
testserv.home respectively, and that provided the JkMountFile was then moved
into the correct apache virtual host context, then the same url could be
mapped by one apache virtual host to worker production and the other apache
virtual host could map to worker test.
I could then have different versions of the same app running on production and
test.
>
> You can always install Apache httpd + Tomcat on a second machine (or on the
> same machine on a separate set of ports), if you are reluctant to try it on
> you production host.
>
> HTH,
> Tim
>
>
> -----Original Message-----
> From: Alan Chandler [mailto:alan@chandlerfamily.org.uk]
> Sent: Tuesday, February 14, 2006 3:50 AM
> To: users@tomcat.apache.org
> Subject: Re: Setting up a parallel test environment on the same machine as
> main server
>
>
> On Sunday 12 February 2006 17:07, Alan Chandler wrote:
> ...
>
> > Unless anyone here can suggest a better way, I would like to move the
> > JkMountFile directive from global scope to virtual host scope and have
> > two separate files urimap files so that I can map different things
> > dependent on which virtual host.
> >
> > However, since this is a live site I don't want to just conduct the
> > simple experiment to see if will work, so I am asking here if this is
> > OK.
>
> Is there really nobody on this list who can answer this simple question?
>
> ...
>
> > However, I don't fully understand the relationship between <service>,
> > <engine> and <host> stanza's in the server.xml file, and until I do, I
> > am reluctant to muck about with it and potentially screw the currently
> > working arrangement.
>
> Specifically, there was some conversation here about it best that if tomcat
> was running on the same box as the web server (which it is in my case) that
> it would be best to make the connection between apache2 and tomcat be via
> localhost. That being the case, how can I map the SAME servlet name but
> from
> a different virtual host (albeit ip based) on apache to DIFFERENT hosts on
> the same tomcat engine.
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: Setting up a parallel test environment on the same machine as main server
Posted by Tim Lucia <ti...@yahoo.com>.
Well, you can run Apache on any number of ports you wish, so if you are
limited by machines, then that is a way out. Personally, I run IIS+2
tomcats clustered and Apache httpd + 2 tomcats clustered all on one dev
machine, just keep the ports straight. That way, I can compare
configurations on the same hardware, same OS, etc.
Tim
-----Original Message-----
From: Alan Chandler [mailto:alan@chandlerfamily.org.uk]
Sent: Tuesday, February 14, 2006 3:14 PM
To: users@tomcat.apache.org
Subject: Re: Setting up a parallel test environment on the same machine as
main server
On Tuesday 14 February 2006 12:36, Tim Lucia wrote:
>
>
> You can always install Apache httpd + Tomcat on a second machine (or
> on the same machine on a separate set of ports), if you are reluctant
> to try it on you production host.
Of course in an ideal world I would - but this is my home, and I don't have
any more spare machines. I am already testing on an independant machine
first, but I want to essentially bring a new version gently into play -
running off of a single database on my main server - just to prove that I
can
bring the application up in as close to production environment as possible
in
a test environment before switching it to live.
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Setting up a parallel test environment on the same machine as main server
Posted by Alan Chandler <al...@chandlerfamily.org.uk>.
On Tuesday 14 February 2006 12:36, Tim Lucia wrote:
>
>
> You can always install Apache httpd + Tomcat on a second machine (or on the
> same machine on a separate set of ports), if you are reluctant to try it on
> you production host.
Of course in an ideal world I would - but this is my home, and I don't have
any more spare machines. I am already testing on an independant machine
first, but I want to essentially bring a new version gently into play -
running off of a single database on my main server - just to prove that I can
bring the application up in as close to production environment as possible in
a test environment before switching it to live.
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: Setting up a parallel test environment on the same machine as main server
Posted by Tim Lucia <ti...@yahoo.com>.
1. Moving the JkMount directive inside a <VirtualHost...> will make it
accesible from only that virtual host. So, you must repeat common ones,
such as /jkmanager. I put the mappings (JkMount(s)) right in the virtual
host definition(s) with no trouble at all.
2. The virtual host is determined by the http host header, not by the
connector host name. This is true for both httpd and tomcat (and any other
web server.)
You can always install Apache httpd + Tomcat on a second machine (or on the
same machine on a separate set of ports), if you are reluctant to try it on
you production host.
HTH,
Tim
-----Original Message-----
From: Alan Chandler [mailto:alan@chandlerfamily.org.uk]
Sent: Tuesday, February 14, 2006 3:50 AM
To: users@tomcat.apache.org
Subject: Re: Setting up a parallel test environment on the same machine as
main server
On Sunday 12 February 2006 17:07, Alan Chandler wrote:
...
> Unless anyone here can suggest a better way, I would like to move the
> JkMountFile directive from global scope to virtual host scope and have
> two separate files urimap files so that I can map different things
> dependent on which virtual host.
>
> However, since this is a live site I don't want to just conduct the
> simple experiment to see if will work, so I am asking here if this is
> OK.
Is there really nobody on this list who can answer this simple question?
...
> However, I don't fully understand the relationship between <service>,
> <engine> and <host> stanza's in the server.xml file, and until I do, I
> am reluctant to muck about with it and potentially screw the currently
> working arrangement.
Specifically, there was some conversation here about it best that if tomcat
was running on the same box as the web server (which it is in my case) that
it would be best to make the connection between apache2 and tomcat be via
localhost. That being the case, how can I map the SAME servlet name but
from
a different virtual host (albeit ip based) on apache to DIFFERENT hosts on
the same tomcat engine.
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Setting up a parallel test environment on the same machine as main server
Posted by Alan Chandler <al...@chandlerfamily.org.uk>.
On Sunday 12 February 2006 17:07, Alan Chandler wrote:
...
> Unless anyone here can suggest a better way, I would like to move the
> JkMountFile directive from global scope to virtual host scope and have two
> separate files urimap files so that I can map different things dependent on
> which virtual host.
>
> However, since this is a live site I don't want to just conduct the simple
> experiment to see if will work, so I am asking here if this is OK.
Is there really nobody on this list who can answer this simple question?
...
> However, I don't fully understand the relationship between <service>,
> <engine> and <host> stanza's in the server.xml file, and until I do, I am
> reluctant to muck about with it and potentially screw the currently working
> arrangement.
Specifically, there was some conversation here about it best that if tomcat
was running on the same box as the web server (which it is in my case) that
it would be best to make the connection between apache2 and tomcat be via
localhost. That being the case, how can I map the SAME servlet name but from
a different virtual host (albeit ip based) on apache to DIFFERENT hosts on
the same tomcat engine.
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org