Load balancing sessions w/multiple apps
I'm trying to setup an environment where I have two app servers and a load balancer all serving one application on two unique ports (80 and 81) where I want the session data to be identical between all four instances of the application. * Box 2** Box 3* * 1 - App A / port 80 ** 3 - App A / port 80 * * 2 - App A / port 81 ** 4 - App A / port 81 * | | | | * * Box 1 * * - loadbalancer (port 80) * * - loadbalancer (port 81) * * My config consist of two declarations for each app server where the default-web-app is the application to be shared. The attribute shared=true is set on both the port 80 and port 81 web-site configs. The appropriate frontend host/port is also configured for each web-site definition as well as server.xml knows about both web-sites. From here I'm not sure on the accuracy of my approach to clustering the two app servers. In the web-site config for instance 1 and instance 3 (see above for instances) are configured to use cluster-island=1 and instance 2 and instance 4 are configured to use cluster-island=2. The loadbalancer listening to port 80 is configured only to listen to cluster-island 1 where the load balancer for port 81 is using cluster-island 2. All apps are distributable and all orion-web.xml have set. With this setup when a request comes into port 80 and is assigned to box 2 / instance 1 and sets a session value; then the same client then switches to port 81 and get assigned box 3 / instance 4 the session value is not set. However if the client sets a session value on instance 1 and then goes to instance 2 or instance 3 the session value is accessible. Where did I go wrong? Is there another way to do this, if it's even possible? Thank, - Mike
Re: multiple apps
thanks for the response. i'm more of a java programmer than a web site administrator so i'm a bit in the dark here. does that mean that i need two network cards in my machine if i want to use 2 appname-web-site.xml files? you suggest changing the host attribute from [ALL], what should i change it to? the larger picture is that we're trying to find the best way to set up orion so we can run duplicate copies of an application, one for each time a person calls us, gives us their credit card number, and says "i'd like to lease your browser based software" we want to be able to: - run multiple apps per machine, and - run an app across multiple machine where a customer puts heavy load on the system. thanks, greg. - Original Message - From: Michael Bosch To: Orion-Interest Sent: Wednesday, February 28, 2001 5:04 PM Subject: Re: multiple apps Having just gone through learning all the configuration details recently the thing that pops out in my mind is whether or not you changed the host attribute in your web-site element of the copy1-web-site.xml and copy2-web-site.xml files so that they're different? It'd make sense that one would run and the other doesn't when they're both activated if this were the case. If they're both set to [ALL] then the first one would probably override the 2nd. -Mike - Original Message - From: Greg Matthews To: Orion-Interest Sent: Tuesday, February 27, 2001 5:27 PM Subject: multiple apps Dear all, I'm having some trouble getting multiple copies of an app to run where i use different -web-site.xml files. I don't have a problem where i configure all the information within server.xml and default-web-site.xml, but i want to use different web-site.xml files so that i can do clustering. I do the following: 1. copy/paste the application within \orion\applications. e.g. \orion\applications\copy1 \orion\applications\copy2 2. create 2 web-site.xml files e.g. \orion\config\copy1-web-site.xml \orion\config\copy2-web-site.xml 3. put a reference to the web-site files in server.xml 4. put a reference to the 2 applications in server.xml Questions a) I can run the copy1 app in my browser, but not copy2. b) If i comment out copy1, then for some reason i can run copy2. c) If i uncomment copy1, then copy1 starts working, and copy2 is not accessible. d) I don't get any error messages relating to not being able to access copy1 or copy2. Does anyone know what i might be doing wrong? Thanks, Greg
Re: multiple apps
Having just gone through learning all the configuration details recently the thing that pops out in my mind is whether or not you changed the host attribute in your web-site element of the copy1-web-site.xml and copy2-web-site.xml files so that they're different? It'd make sense that one would run and the other doesn't when they're both activated if this were the case. If they're both set to [ALL] then the first one would probably override the 2nd. -Mike - Original Message - From: Greg Matthews To: Orion-Interest Sent: Tuesday, February 27, 2001 5:27 PM Subject: multiple apps Dear all, I'm having some trouble getting multiple copies of an app to run where i use different -web-site.xml files. I don't have a problem where i configure all the information within server.xml and default-web-site.xml, but i want to use different web-site.xml files so that i can do clustering. I do the following: 1. copy/paste the application within \orion\applications. e.g. \orion\applications\copy1 \orion\applications\copy2 2. create 2 web-site.xml files e.g. \orion\config\copy1-web-site.xml \orion\config\copy2-web-site.xml 3. put a reference to the web-site files in server.xml 4. put a reference to the 2 applications in server.xml Questions a) I can run the copy1 app in my browser, but not copy2. b) If i comment out copy1, then for some reason i can run copy2. c) If i uncomment copy1, then copy1 starts working, and copy2 is not accessible. d) I don't get any error messages relating to not being able to access copy1 or copy2. Does anyone know what i might be doing wrong? Thanks, Greg
Re: multiple apps
Hi, I seem to be having similar problems. I have 2 application which use a common set of JSP's. For one JSP page, I have a problem wherein if I try to access that particular page in one application it will work, but will fail if used in the second application. The worst part is that both the JSP pages are identical. I dont even have different web-site.xml files. All the applications are defined in the default-web-site.xml Any insights would be appreciated Thanks 'n Regards Aniket At 06:57 AM 2/28/2001, you wrote: > >Dear all, > >I'm having some trouble getting multiple copies of an app to run where >i use different -web-site.xml files. > >I don't have a problem where i configure all the information within >server.xml and default-web-site.xml, but i want to use different >web-site.xml files so that i can do clustering. > >I do the following: > >1. copy/paste the application within \orion\applications. > e.g.\orion\applications\copy1 > \orion\applications\copy2 > >2. create 2 web-site.xml files > > e.g.\orion\config\copy1-web-site.xml > \orion\config\copy2-web-site.xml > >3. put a reference to the web-site files in server.xml > > > >4. put a reference to the 2 applications in server.xml > > > > > >Questions > > >a) I can run the copy1 app in my browser, but not copy2. > >b) If i comment out copy1, then for some reason i can run copy2. > >c) If i uncomment copy1, then copy1 starts working, and copy2 is not >accessible. > >d) I don't get any error messages relating to not being able to access >copy1 or copy2. > > >Does anyone know what i might be doing wrong? > >Thanks, >Greg >
multiple apps
Dear all, I'm having some trouble getting multiple copies of an app to run where i use different -web-site.xml files. I don't have a problem where i configure all the information within server.xml and default-web-site.xml, but i want to use different web-site.xml files so that i can do clustering. I do the following: 1. copy/paste the application within \orion\applications. e.g. \orion\applications\copy1 \orion\applications\copy2 2. create 2 web-site.xml files e.g. \orion\config\copy1-web-site.xml \orion\config\copy2-web-site.xml 3. put a reference to the web-site files in server.xml 4. put a reference to the 2 applications in server.xml Questions a) I can run the copy1 app in my browser, but not copy2. b) If i comment out copy1, then for some reason i can run copy2. c) If i uncomment copy1, then copy1 starts working, and copy2 is not accessible. d) I don't get any error messages relating to not being able to access copy1 or copy2. Does anyone know what i might be doing wrong? Thanks, Greg
