Forum Discussion

Cirrus

Jan 20, 2021

HTTPS REDIRECTION : Specific NODE using iRULE

Hi Experts ,

i am working on one requirement where i need to redirect https://www.example.com needs to redirect to specific NODES ( 8 nos ) based on URI PATH .

i have created a layer 7 virtual server with SSL profile and attach it with following irule :

when HTTP_REQUEST { 
 
        if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/m2p/"} 
        {
        node 10.30.214.1 2783
        return 
    }
	
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/aps/"}
        {
        node 10.30.230.31 7001
        return 
    }
	
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/bmx/"} 
        {
        node 10.30.214.38 61648
        return 
    }
	
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/cts/"}
        {
        node 10.30.214.236 4515
        return 
    }
	
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/mii/"} 
        {
        node 10.30.215.174 50000
        return 
    }
	
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/ampla-bma/"}
	{
        node 10.30.222.43 8889
        return 
    }
	
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/ampla-bmc/"} 
	{
        node 10.38.2.48 8889
        return 
    }
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/iqt-bma/"} 
	{
        node 10.30.215.208 8889
        return 
    }
	if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and [HTTP::path] eq "/iqt-bmc/"}
	{
        node 10.30.222.230 8889
        return 
    }
	
	
}

when i try to access the VIP IP using its DNS name https://TEST-ESB-VIP-BMA.example.com/m2p as an example , BIG-IP is sending me RST back stating no Server selected . I can see hit on irule in the statistic TAB . 

Here is the packet capture from the BIG-IP : 

10.30.230.58.https > 10.139.153.195.53666: Flags [.], cksum 0x94c1 (incorrect -> 0x7121), ack 1352, win 5449, length 0 out slot1/tmm0 lis=/Common/VS_MULE_BMA_TEST_HTTPS_443 flowtype=64 flowid=560000E1C600 peerid=0 conflags=4000024 inslot=63 inport=23 haunit=1 priority=3 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
02:14:04.293589 00:50:56:ba:17:86 > 54:7f:ee:09:d8:c1, ethertype 802.1Q (0x8100), length 176: vlan 2200, p 0, ethertype IPv4, (tos 0x0, ttl 255, id 44631, offset 0, flags [DF], proto TCP (6), length 40)
    10.30.230.58.https > 10.139.153.195.53666: Flags [.], cksum 0x94c1 (incorrect -> 0x7121), ack 1352, win 5449, length 0 out slot1/tmm0 lis=/Common/VS_MULE_BMA_TEST_HTTPS_443 flowtype=64 flowid=560000E1C600 peerid=0 conflags=4000024 inslot=63 inport=23 haunit=1 priority=3 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
02:14:04.293640 00:50:56:ba:17:86 > 54:7f:ee:09:d8:c1, ethertype 802.1Q (0x8100), length 246: vlan 2200, p 0, ethertype IPv4, (tos 0x0, ttl 255, id 44633, offset 0, flags [DF], proto TCP (6), length 83)
    10.30.230.58.https > 10.139.153.195.53666: Flags [R.], cksum 0x94ec (incorrect -> 0xc3d1), seq 148:191, ack 1352, win 0, length 43 [RST+ BIG-IP: [0x29b630c:4504] No se] out slot1/tmm0 lis=/Common/VS_MULE_BMA_TEST_HTTPS_443 flowtype=64 flowid=560000E1C600 peerid=0 conflags=4800024 inslot=63 inport=23 haunit=1 priority=3 rst_cause="[0x29b630c:4504] No server selected" peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0

I am NOT sure what i am doing wrong here .If anyone can guide me what i am doing wrong will be much appreciated .

Thanks in advance .

21 Replies

KeesvandenBos
MVP
Jan 20, 2021
Hi,
Could you add this in a seperate irule?
when HTTP_REQUEST { log local0. "This is the HTTP Host [HTTP::host]" log local0. "This is the HTTP Path [HTTP::path]" }
And past the logging here?
Because it looks like there is no match.
Cheers,
Kees
Deepak_Nair
Cirrus
Jan 21, 2021
Hi Kees van den Bos ,

I have the created the irule logging , here is the logs :

Jan 21 11:44:50 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:50 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:44:51 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:51 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:44:55 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:55 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:44:55 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:55 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:44:56 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:56 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:44:57 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:57 BNE1PLBVENT01 info tmm[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:44:57 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:44:57 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/
Jan 21 11:45:02 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Jan 21 11:45:02 BNE1PLBVENT01 info tmm1[16685]: Rule /Common/irule_Logging <HTTP_REQUEST>: This is the HTTP Path /m2p/

The irule is hitting as expected BUT its not taking any ACTION . Not sure if my iRule is wrong or something else .
Deepak_Nair
Cirrus
Jan 21, 2021
The requirement is to HIT via LB so that SSL can be performed via F5 . i will remove "return" statement and see how it goes .
Deepak_Nair
Cirrus
Jan 21, 2021
Ok removed the "Return" statement from iRule but no luck , Still says no server selected .
Daniel_Wolf
MVP
Jan 21, 2021
I wrote a simplified variant of your iRule. Tested and works as expected.
when HTTP_REQUEST { if { [HTTP::host] equals "www.myfancydomain.com" && [HTTP::uri] starts_with "/test" } { node 10.100.153.40 3000 } }
Note that I am matching the HTTP::host with equals, not with contains, because HTTP::host should be an exact match anyways.
Also I used HTTP::uri instead of HTTP::path and, but more important, I use starts_with, because HTTP::uri might also be /test/image1.jpg, test/index.html...
Differences between are explained here:
https://clouddocs.f5.com/api/irules/HTTP__path.html
https://clouddocs.f5.com/api/irules/HTTP__uri.html
Differences between contains, equals, starts_with and so on here:
https://devcentral.f5.com/s/articles/irules-101-02-if-and-expressions
And since you are always matching the same HTTP::host value, you might want to remove that check from your iRule logic and go for a switch statement to only match the HTTP::uri. Something like this.
switch -glob [HTTP::uri] { "/foo*" { # this will match on any string that starts with "/foo" } "*bar" { # this will match on any string that ends with "bar" }....
For details see here: https://devcentral.f5.com/s/articles/irules-101-04-switch
Daniel_Wolf
MVP
Jan 21, 2021
And another thing I noticed is:
You match for
if {[HTTP::host] contains "TEST-ESB-VIP-BMA.example.com" and
and you log:
<HTTP_REQUEST>: This is the HTTP Host test-esb-vip-bma.example.com
Notice a difference in CAPITALIZATION. Maybe better try
if {([string tolower [HTTP::host]] equals "www.myfancydomain.com")

KeesvandenBos

MVP

Jan 21, 2021

Hi,

As Daniel stated, the host is in lower case, not upper.

Could you test this irule:

when HTTP_REQUEST { 
    if {([string tolower [HTTP::host]] equals "test-esb-vip-bma.example.com") } {
        if {[HTTP::uri] starts_with "/m2p" } 
        {
        node 10.30.214.1 2783
        return 
        }
	    if {[HTTP::uri] starts_with "/aps"}
        {
        node 10.30.230.31 7001
        return 
        }
	    if {[HTTP::uri] starts_with "/bmx"} 
        {
        node 10.30.214.38 61648
        return 
        }
	    if {[HTTP::uri] starts_with "/cts"}
        {
        node 10.30.214.236 4515
        return 
        }
	    if {[HTTP::uri] starts_with "/mii"} 
        {
        node 10.30.215.174 50000
        return 
        }
	    if {[HTTP::uri] starts_with "/ampla-bma"}
	    {
        node 10.30.222.43 8889
        return 
        }
		if {[HTTP::uri] starts_with "/ampla-bmc"} 
	    {
        node 10.38.2.48 8889
        return 
        }
        if {[HTTP::uri] starts_with "/iqt-bma"} 
	    {
        node 10.30.215.208 8889
        return 
        }
        if {[HTTP::uri] starts_with "/iqt-bmc"}
	    {
        node 10.30.222.230 8889
        return 
        }
    }    	
}

Cheers,

Kees

Deepak_Nair
Cirrus
Jan 21, 2021
Hi Kees ,

Thanks for the code . it work for "/m2p" and other NOT working . Now I removed RETURN at the end of each NODE . Looks likes its Working . I am doing more TESTING .

Can you please ADVISE on this Irule .

when HTTP_REQUEST {
  if {([string tolower [HTTP::host]] equals "test-esb-vip-bma.bhp.com") } {
    if {[HTTP::uri] starts_with "/m2p" }
    {
    node 10.30.214.1 2783

    }
  if {[HTTP::uri] starts_with "/aps"}
    {
    node 10.30.230.31 7001

    }
  if {[HTTP::uri] starts_with "/bmx"}
    {
    node 10.30.214.38 61648

    }
  if {[HTTP::uri] starts_with "/cts"}
    {
    node 10.30.214.236 4515

    }
  if {[HTTP::uri] starts_with "/mii"}
    {
    node 10.30.215.174 50000

    }
  if {[HTTP::uri] starts_with "/ampla-bma"}
  {
    node 10.30.222.43 8889

    }
if {[HTTP::uri] starts_with "/ampla-bmc"}
  {
    node 10.38.2.48 8889

    }
    if {[HTTP::uri] starts_with "/iqt-bma"}
  {
    node 10.30.215.208 8889

    }
    if {[HTTP::uri] starts_with "/iqt-bmc"}
  {
    node 10.30.222.230 8889

    }
  }
}

Many Thanks for Helping me OUT .
KeesvandenBos
MVP
Jan 21, 2021
Hi,

This rule looks fine to me.

Cheers,

Kees
joyride_us
Altostratus
Jan 21, 2021
Yes, you had strictly defined your URI path at the first attempts : "eq". Please note that the last script states "start with" which offers more flexibility...but less security.