Akshay, On 12/8/15 8:07 AM, Kernel freak wrote: > I am working on a Debian server in which I would like to setup 2 instances > of Apache tomcat which will be load balanced by an Apache HTTP server(Do I > require a http server? ). In-case one copy of Apache tomcat goes down, the > other one will automatically comes online.
You won't require Apache httpd, but you will need some kind of proxying server. Nginx and haproxy will work. Squid, Varnish, etc. will presumably all work as well. This community has expertise with Apache httpd -> Tomcat as well as some others. I personally have only ever used Apache httpd (and likely haproxy, though I don't actually know what AWS ELB is using. In either case, I don't configure it directly, so it doesn't matter). > While I was creating a configuration for one of our server, I know how to > relay requests based upon URL to Apache Tomcat, these are the 2 things I > don't know. > > 1) Will this work with https? Reason I ask is, there are many pages which > are served under https and the configuration which I have and shown below > seems to be calling with http instead of https. > > 2) How to trigger the 2nd copy of tomcat. > > Here is what I have till now in Apache web server : > > // Below is the redirection for tomcat webapps. > <VirtualHost *:80> > ServerName www.domain_tomcat.de > ServerAlias domain_tomcat.de > ProxyRequests on I don't think you want this *at all*. "ProxyRequests" is for forward-proxying, like providing a MITM for outgoing HTTP traffic. > ProxyPreserveHost On > <Proxy *> > Order deny,allow > Allow from all > </Proxy> > > // I was thinking instead of routing to maintenance.html, I would start the > other app, but that sounds quite hackish. I thought there might be a better > way. > ErrorDocument 503 /maintenance.html > ErrorDocument 404 /maintenance.html > ErrorDocument 500 /maintenance.html > > ProxyPass /maintenance.html ! > > // As you can see below, I am redirecting with http, which is my first > point, will it automatically redirect to https, as tomcat webapp is using > Spring-security and it has specific paths for which it must use https. > ProxyPass / http://localhost:8080/ > ProxyPassReverse / http://localhost:8080/ If your VirtualHost supports HTTPS, then you can still use http://localhost:8080 as your target. You just need to make sure that you send-over all the appropriate headers to the back-end server, and enable the various Valves on the Tomcat side to handle the proxying of this information: http://tomcat.apache.org/tomcat-8.0-doc/config/valve.html#Proxies_Support > <Location / > > Order allow,deny > Allow from all > </Location> > </VirtualHost> > > My tomcat config is rather simple : > > <Connector port="8080" proxyPort="80" redirectPort="443" > protocol="org.apache.coyote.http11.Http11NioProtocol" compression="force" > compressionMinSize="1024" > connectionTimeout="20000" maxPostSize="5242880" > URIEncoding="utf-8" > compressableMimeType="text/html,text/xml,text/plain,text/css,text/ > javascript,application/x-javascript,application/javascript"/> > > > <Connector port="443" > protocol="org.apache.coyote.http11.Http11NioProtocol" > maxPostSize="5242880" SSLEnabled="true" maxThreads="200" compr$ > compressionMinSize="1024" scheme="https" secure="true" > clientAuth="false" sslProtocol="TLS" > keystoreFile="keystore.jks" keystorePass="PASSWORD" > URIEncoding="utf-8" > compressableMimeType="text/html,text/xml,text/plain,text/css,text/ > javascript,application/x-javascript,application/javascript"/> > > I can setup a similar instance of Tomcat in another location if desired. > But how can I handle the switching between them when one goes down. Kindly > let me know. Thank you. :-) Do you actually want a hot-standby, or do you want to load-balance amongst the servers that are available? Often, it's better to use both servers at once and have one of them take all of the load, than to completely switch from one to another. -chris --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
