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Posted to users@tomcat.apache.org by Manisha Chermadurai <ma...@gmail.com> on 2023/01/09 14:22:59 UTC
Re: Having two servers and controlling my secondary server with the primary server
Good evening Sir,
I am trying to control my secondary server with the primary server of mine.
Bothe are of versions 9.0. Primary server has been available in my physical
machine and my secondary server is in virtual machine. Both are of windows
10. I am connecting the vm's 8080 port through the ip address from primary
machine. It works fine. But I have a doubt like , Can I create my secondary
server without allocating port ? I have tried it works fine, but there is
no entry point for my server. I have doubt of creating a comnector for my
vm's server from my primary server and the condition is also like I have to
create a connector for my secondary server and it can be accessible only
when my primary server is down. I have researched and tried many things for
literally 2 weeks. But I got stuck in this. So, once again I repeat my
question, it's I have to create a connector for my secondary server by my
primary server and it will be only accessible when my primary server is
down.So my client won't get chance to connect my secondary server through
the ip and port. I have tried failover with nginx. But I want to try this
only with my server.xml file.
Kindly help me with this question.
Thank You for your support
Re: Having two servers and controlling my secondary server with the primary server
Posted by Olaf Kock <to...@olafkock.de>.
On 09.01.23 18:12, Mark Thomas wrote:
> Your mentor is wrong.
>
> Mark
>
To elaborate on that: When one server is down, its configuration will be
inactive as well. There's nothing that this non-running server will be
able to do for you. You'll need to externalize the decision which
server's responses to serve to /some/ external entity
Olaf
>
> On 09/01/2023 14:56, Manisha Chermadurai wrote:
>> Thanks for this.
>>
>> I have set up the solution for failover using nginx as a proxy server
>> between my two tomcat servers. But my mentor told with only using tomcat
>> server's configuration files, you can redirect the requests to another
>> server if and only if the particular server is down. So I am
>> searching for
>> this solution, and came to know about this group. So I requested
>> about this
>> , may be I will get some ideas.
>>
>> Really thanks for response.
>>
>> On Mon, 9 Jan 2023, 8:21 pm Olaf Kock, <to...@olafkock.de> wrote:
>>
>>> On 09.01.23 15:22, Manisha Chermadurai wrote:
>>>> Good evening Sir,
>>>>
>>>>
>>>> I am trying to control my secondary server with the primary server of
>>> mine.
>>>> Bothe are of versions 9.0. Primary server has been available in my
>>> physical
>>>> machine and my secondary server is in virtual machine. Both are of
>>> windows
>>>> 10. I am connecting the vm's 8080 port through the ip address from
>>> primary
>>>> machine. It works fine. But I have a doubt like , Can I create my
>>> secondary
>>>> server without allocating port ? I have tried it works fine, but
>>>> there is
>>>> no entry point for my server. I have doubt of creating a comnector
>>>> for my
>>>> vm's server from my primary server and the condition is also like I
>>>> have
>>> to
>>>> create a connector for my secondary server and it can be accessible
>>>> only
>>>> when my primary server is down. I have researched and tried many
>>>> things
>>> for
>>>> literally 2 weeks. But I got stuck in this. So, once again I repeat my
>>>> question, it's I have to create a connector for my secondary
>>>> server by
>>> my
>>>> primary server and it will be only accessible when my primary
>>>> server is
>>>> down.So my client won't get chance to connect my secondary server
>>>> through
>>>> the ip and port. I have tried failover with nginx. But I want to
>>>> try this
>>>> only with my server.xml file.
>>>
>>> If I understand your use case correctly, I'd recommend to set up a load
>>> balancer that handles the failover.
>>>
>>> Other options depend on the scenario you're looking for: Should your
>>> secondary server be a hot-backup for the primary one (e.g. immediate
>>> failover with no downtime?) or a cold backup that get started only when
>>> some component determines that the primary server went down?
>>>
>>> You will need to configure a Connector (with a port) on both servers if
>>> you want to be able to access them.
>>>
>>> And I'd recommend to either use some orchestration for it, or just
>>> manually configure your second server. Tomcat itself is not the tool of
>>> choice to configure one server through another one. There are
>>> components
>>> that allow you to distribute deployed web applications (e.g.
>>> https://tomcat.apache.org/tomcat-9.0-doc/config/cluster-deployer.html),
>>> but that's a different use case than what you're asking for.
>>>
>>> If you absolutely want to work around a load balancer, you might be
>>> able
>>> to do some trickery with firewall-level redirection, but I'd say that
>>> this is less transparent than explicitly configuring a load balancer.
>>>
>>> Olaf
>>>
>>>
>>>
>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>> For additional commands, e-mail: users-help@tomcat.apache.org
>>>
>>>
>>
>
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Re: Having two servers and controlling my secondary server with the primary server
Posted by Mark Thomas <ma...@apache.org>.
Your mentor is wrong.
Mark
On 09/01/2023 14:56, Manisha Chermadurai wrote:
> Thanks for this.
>
> I have set up the solution for failover using nginx as a proxy server
> between my two tomcat servers. But my mentor told with only using tomcat
> server's configuration files, you can redirect the requests to another
> server if and only if the particular server is down. So I am searching for
> this solution, and came to know about this group. So I requested about this
> , may be I will get some ideas.
>
> Really thanks for response.
>
> On Mon, 9 Jan 2023, 8:21 pm Olaf Kock, <to...@olafkock.de> wrote:
>
>> On 09.01.23 15:22, Manisha Chermadurai wrote:
>>> Good evening Sir,
>>>
>>>
>>> I am trying to control my secondary server with the primary server of
>> mine.
>>> Bothe are of versions 9.0. Primary server has been available in my
>> physical
>>> machine and my secondary server is in virtual machine. Both are of
>> windows
>>> 10. I am connecting the vm's 8080 port through the ip address from
>> primary
>>> machine. It works fine. But I have a doubt like , Can I create my
>> secondary
>>> server without allocating port ? I have tried it works fine, but there is
>>> no entry point for my server. I have doubt of creating a comnector for my
>>> vm's server from my primary server and the condition is also like I have
>> to
>>> create a connector for my secondary server and it can be accessible only
>>> when my primary server is down. I have researched and tried many things
>> for
>>> literally 2 weeks. But I got stuck in this. So, once again I repeat my
>>> question, it's I have to create a connector for my secondary server by
>> my
>>> primary server and it will be only accessible when my primary server is
>>> down.So my client won't get chance to connect my secondary server through
>>> the ip and port. I have tried failover with nginx. But I want to try this
>>> only with my server.xml file.
>>
>> If I understand your use case correctly, I'd recommend to set up a load
>> balancer that handles the failover.
>>
>> Other options depend on the scenario you're looking for: Should your
>> secondary server be a hot-backup for the primary one (e.g. immediate
>> failover with no downtime?) or a cold backup that get started only when
>> some component determines that the primary server went down?
>>
>> You will need to configure a Connector (with a port) on both servers if
>> you want to be able to access them.
>>
>> And I'd recommend to either use some orchestration for it, or just
>> manually configure your second server. Tomcat itself is not the tool of
>> choice to configure one server through another one. There are components
>> that allow you to distribute deployed web applications (e.g.
>> https://tomcat.apache.org/tomcat-9.0-doc/config/cluster-deployer.html),
>> but that's a different use case than what you're asking for.
>>
>> If you absolutely want to work around a load balancer, you might be able
>> to do some trickery with firewall-level redirection, but I'd say that
>> this is less transparent than explicitly configuring a load balancer.
>>
>> Olaf
>>
>>
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
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Re: Having two servers and controlling my secondary server with the primary server
Posted by Manisha Chermadurai <ma...@gmail.com>.
Thanks for this.
I have set up the solution for failover using nginx as a proxy server
between my two tomcat servers. But my mentor told with only using tomcat
server's configuration files, you can redirect the requests to another
server if and only if the particular server is down. So I am searching for
this solution, and came to know about this group. So I requested about this
, may be I will get some ideas.
Really thanks for response.
On Mon, 9 Jan 2023, 8:21 pm Olaf Kock, <to...@olafkock.de> wrote:
> On 09.01.23 15:22, Manisha Chermadurai wrote:
> > Good evening Sir,
> >
> >
> > I am trying to control my secondary server with the primary server of
> mine.
> > Bothe are of versions 9.0. Primary server has been available in my
> physical
> > machine and my secondary server is in virtual machine. Both are of
> windows
> > 10. I am connecting the vm's 8080 port through the ip address from
> primary
> > machine. It works fine. But I have a doubt like , Can I create my
> secondary
> > server without allocating port ? I have tried it works fine, but there is
> > no entry point for my server. I have doubt of creating a comnector for my
> > vm's server from my primary server and the condition is also like I have
> to
> > create a connector for my secondary server and it can be accessible only
> > when my primary server is down. I have researched and tried many things
> for
> > literally 2 weeks. But I got stuck in this. So, once again I repeat my
> > question, it's I have to create a connector for my secondary server by
> my
> > primary server and it will be only accessible when my primary server is
> > down.So my client won't get chance to connect my secondary server through
> > the ip and port. I have tried failover with nginx. But I want to try this
> > only with my server.xml file.
>
> If I understand your use case correctly, I'd recommend to set up a load
> balancer that handles the failover.
>
> Other options depend on the scenario you're looking for: Should your
> secondary server be a hot-backup for the primary one (e.g. immediate
> failover with no downtime?) or a cold backup that get started only when
> some component determines that the primary server went down?
>
> You will need to configure a Connector (with a port) on both servers if
> you want to be able to access them.
>
> And I'd recommend to either use some orchestration for it, or just
> manually configure your second server. Tomcat itself is not the tool of
> choice to configure one server through another one. There are components
> that allow you to distribute deployed web applications (e.g.
> https://tomcat.apache.org/tomcat-9.0-doc/config/cluster-deployer.html),
> but that's a different use case than what you're asking for.
>
> If you absolutely want to work around a load balancer, you might be able
> to do some trickery with firewall-level redirection, but I'd say that
> this is less transparent than explicitly configuring a load balancer.
>
> Olaf
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: Having two servers and controlling my secondary server with the primary server
Posted by Olaf Kock <to...@olafkock.de>.
On 09.01.23 15:22, Manisha Chermadurai wrote:
> Good evening Sir,
>
>
> I am trying to control my secondary server with the primary server of mine.
> Bothe are of versions 9.0. Primary server has been available in my physical
> machine and my secondary server is in virtual machine. Both are of windows
> 10. I am connecting the vm's 8080 port through the ip address from primary
> machine. It works fine. But I have a doubt like , Can I create my secondary
> server without allocating port ? I have tried it works fine, but there is
> no entry point for my server. I have doubt of creating a comnector for my
> vm's server from my primary server and the condition is also like I have to
> create a connector for my secondary server and it can be accessible only
> when my primary server is down. I have researched and tried many things for
> literally 2 weeks. But I got stuck in this. So, once again I repeat my
> question, it's I have to create a connector for my secondary server by my
> primary server and it will be only accessible when my primary server is
> down.So my client won't get chance to connect my secondary server through
> the ip and port. I have tried failover with nginx. But I want to try this
> only with my server.xml file.
If I understand your use case correctly, I'd recommend to set up a load
balancer that handles the failover.
Other options depend on the scenario you're looking for: Should your
secondary server be a hot-backup for the primary one (e.g. immediate
failover with no downtime?) or a cold backup that get started only when
some component determines that the primary server went down?
You will need to configure a Connector (with a port) on both servers if
you want to be able to access them.
And I'd recommend to either use some orchestration for it, or just
manually configure your second server. Tomcat itself is not the tool of
choice to configure one server through another one. There are components
that allow you to distribute deployed web applications (e.g.
https://tomcat.apache.org/tomcat-9.0-doc/config/cluster-deployer.html),
but that's a different use case than what you're asking for.
If you absolutely want to work around a load balancer, you might be able
to do some trickery with firewall-level redirection, but I'd say that
this is less transparent than explicitly configuring a load balancer.
Olaf
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