irule for choosing pool and rewriting

Hi Alexander, do you think that ltm rewrite profile could be easier for you ? it is available starting 11.4 and can do this rewriting from gui. With ltm policy, you could do the pool selection as well from the gui.

I recommend doing a TCPDUMP of the traffic in both directions. If your response does not have the "/example1/*" in the uri when it replies then you could be getting redirected to the wwwserver_pool.

Jason

when HTTP_REQUEST {
 set HOST [string tolower [HTTP::host]]
  set HOST [string tolower [HTTP::uri]]

   if { ($HOST eq "host.domain.tld") and ($URI eq "/example1/appname")} {
       HTTP::uri  [string map {"/example1" ""} [HTTP::uri]]
         HTTP::host [string map {"host.domain.tld" "example1_pool"} [HTTP::host]]
         pool APPNAME_POOL_example1

   }
}

You would have to run some curl commands to figure out the response from the servers and possibly make changes to the response headers.

Hi Odaah,

the code you provided does not rewrite the html response. So the first html page is loaded but the links to graphics etc. are broken.

How can I change the response headers? The commands do not work similarly: 01070151:3: Rule [/projects/host.domain.tld_rewrite_irule] error: /projects/host.domain.tld_rewrite_irule:11: error: [command is not valid in current event context (HTTP_RESPONSE)][HTTP::host]

Regards, Alex

this is just an example. it may not fully be what you are looking for but hope it helps.

 configuration

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        stream { }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 3
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:80 {
            address 200.200.200.101
        }
    }
}
root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm rule qux
ltm rule qux {
    when HTTP_REQUEST {
  STREAM::disable
  HTTP::header remove "Accept-Encoding"

  switch -glob -- [HTTP::uri] {
    "/example1/*" {
      HTTP::uri [string map {"/example1" ""} [HTTP::uri]]
      HTTP::host "example1.domain.tld"
    }
    default {
       do something
    }
  }
}
when HTTP_RESPONSE {
  if { [HTTP::header value Content-Type] contains "text" } {
    STREAM::expression {@http://example1.domain.tld@http://host.domain.tld/example1@@http://example2.domain.tld@http://host.domain.tld/example2@}
    STREAM::enable
  }
}
}

 original response

[root@ve11a:Active:In Sync] config  curl http://200.200.200.101/test.html
1:http://www.google.com
2:http://example1.domain.tld/something
3:http://example2.domain.tld/somethingelse
4:http://www.yahoo.com

 trace

[root@ve11a:Active:In Sync] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.24.1(38472) <-> 172.28.24.10(80)
1415022550.4740 (0.0014)  C>S
---------------------------------------------------------------
GET /example1/test.html HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.24.10
Accept: */*

---------------------------------------------------------------

New TCP connection 2: 200.200.200.14(38472) <-> 200.200.200.101(80)
1415022550.4755 (0.0013)  C>S
---------------------------------------------------------------
GET /test.html HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: example1.domain.tld
Accept: */*

---------------------------------------------------------------

1415022550.4778 (0.0022)  S>C
---------------------------------------------------------------
HTTP/1.1 200 OK
Date: Mon, 03 Nov 2014 13:34:43 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Mon, 03 Nov 2014 12:57:04 GMT
ETag: "418999-81-e21e2800"
Accept-Ranges: bytes
Content-Length: 129
Content-Type: text/html; charset=UTF-8

1:http://www.google.com
2:http://example1.domain.tld/something
3:http://example2.domain.tld/somethingelse
4:http://www.yahoo.com
---------------------------------------------------------------

1415022550.4781 (0.0041)  S>C
---------------------------------------------------------------
HTTP/1.1 200 OK
Date: Mon, 03 Nov 2014 13:34:43 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Mon, 03 Nov 2014 12:57:04 GMT
ETag: "418999-81-e21e2800"
Accept-Ranges: bytes
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked

8b
1:http://www.google.com
2:http://host.domain.tld/example1/something
3:http://host.domain.tld/example2/somethingelse
4:http://www.yahoo.com

---------------------------------------------------------------

Hi,

I would like to share the solution we have finally found. We changed the rewriting task to a redirecting task. We do the following redirects:

 >> 
 >> 
 >> 

For each exampleX we create a DNS entry and in the irule we switch the pool by the hostname. For encryption we get a wildcard certificate, which does not impose much of a security concern, because the domain.tld is used exclusively for this virtual server.

Thanks to all for helping!

Regards, Alex