Priority Group activation between 10 servers
Hi All, Is it possible to enable the priority group activation between 10 servers- condition is that at a time any one server should up, if it goes down any other one server become active and serve the request. Meaning out of 10 servers 1 should serve the request on F5 LTM.
iRule change pool for only one request
I want an iRule that looks like this: when HTTP_REQUEST { switch -glob [HTTP::path] { "/cgi-bin/*" { pool cgi_pool } } } However, I find that this sometimes creates problems. I suspect that it's due to persistent HTTP connections, and once that connection makes a request to /cgi-bin/* once, all future requests use the new pool. (If someone can confirm or deny that, that would be great.) So I modified the iRule to look like this: when HTTP_REQUEST { switch -glob [HTTP::path] { "/cgi-bin/*" { pool cgi_pool } default { pool default_pool } } } Which seems to work. But then that causes problems when I have another iRule that also changes the pool. If that other iRule comes first, its changes get overridden by this one, and that gets to be easily forgettable management overhead. So my question is: Is it possible to have a pool change be in effect for only one particular HTTP request and not have to manually select the default pool for all of the other requests? I'd be fine with terminating the HTTP session after the oddball request, but I can't see a simple way to tell the iRule to complete this one request, and then close the connection.
How do I enable and disable pool members using iControlREST
Hi I'm trying to the following PUT request to enable a pool member (IP's masked out): https://10.102.xx.xx/mgmt/tm/ltm/pool/~QA~pool_vcoza_portal_UAT/members/~QA~10.102.xx.xx:9001 My request has the following body and Content-Type: application/json { "state" : "up" } I get the following result back: {"code":400,"message":"invalid property value \"state\":\"up\"","errorStack":[]} However, doing the same kind of thing for other properties, dynamicRatio for example, does work. Please help!iControl REST - Finding a pool with a specific member
Hi, Would anyone know of a shortcut to finding a pool (or pools) with a specific member? In the WebGUI (v13.1.3) when viewing the properties of a node there is a Pool Membership tab. It will show what pools the node is a member of. I would like to use an iControl REST call to determine the same thing. I have the code to get the list of pools with their basic properties. One of the pool's properties is the memberReference link. I can use this link to get a list of pool members with properties including memberName (nodeName:port), IPaddress, etc. Potentially I could query every pool (500+) and build a list of pool members with the properties like: PoolName, memberName, IPaddress.... Then I could scan this list for either the node or the node's IP address. It's a bit of a pig. Just thought there might be a quicker way. ...Patrick
SSL issue
Hello there, We have a F5 LTM and a virtual server configured to a server in port 443, the topology is: Computer --> F5 LTM --> switch --> server When we try to connect to the server through https we saw the message "Connection reset" in the browser, but if we try to connect without passing the F5 the connection is successful. We don't have configured any SSL client profile or server. This is the configuration on F5: #Virtual Server #________________________________________________________________________________ ltm virtual /Common/Server1 { destination /Common/10.1.5.X:443 ip-protocol tcp mask 255.255.255.255 pool /Common/Server1 profiles { /Common/tcp { } } source 0.0.0.0/0 translate-address enabled translate-port enabled } #________________________________________________________________________________ #Pools #________________________________________________________________________________ ltm pool /Common/Server1 { members { /Common/10.1.7.X:443 { address 10.1.7.X } } monitor /Common/https_443 } #________________________________________________________________________________ #Profiles #________________________________________________________________________________ # -Default Profile- ltm profile tcp tcp { ack-on-push enabled close-wait-timeout 5 congestion-control high-speed deferred-accept disabled delayed-acks enabled ecn disabled fin-wait-timeout 5 idle-timeout 300 keep-alive-interval 1800 limited-transmit enabled max-retrans 8 nagle disabled proxy-buffer-high 49152 proxy-buffer-low 32768 proxy-mss disabled proxy-options disabled receive-window-size 65535 reset-on-timeout enabled selective-acks enabled send-buffer-size 65535 slow-start enabled syn-max-retrans 3 time-wait-recycle enabled time-wait-timeout 2000 timestamps enabled } As you can see, we don't have any SSL client or server profile and we tried changing "translate-port" to disabled and "Source Address Translation" to auto map but none of these work. Also we made a tcpdump and we can see the TCP Reset from 10.1.7.X (tcpdump.png) and some curl (curl.png), openssl (openssl.png and openssl2.png) and a telnet (telnet.png). Hope you can help us to find out what's going on. Thank you.iControl REST: Working with Pool Members
Since iControl REST is the new kid on the block, it's bound to start getting some of the same questions we've addressed with traditional iControl. One of these oft-asked and misunderstood questions is about enabling/disabling pool members. The original poster in this case is actually facing a syntax issue with the allowable state issues in the json payload, but I figured I'd kill two birds with one stone here and address both concerns going forward. DevCentral member Rudi posted in Q&A asking for some assistance with disabling a pool member. He was able to change some properties on the pool member, but trying to change the state resulted in this error: {"code":400,"message":"invalid property value \"state\":\"up\"","errorStack":[]} The REST interface is complaining about an invalid property, mainline, the "up" state. If you do a query against an "up" pool member, you can see that the state is "unchecked" instead of up. { "state": "unchecked", "connectionLimit": 0, "address": "192.168.101.11", "selfLink": "https://localhost/mgmt/tm/ltm/pool/testpool/members/~Common~192.168.101.11:8000?ver=11.5.1", "generation": 63, "fullPath": "/Common/192.168.101.11:8000", "partition": "Common", "name": "192.168.101.11:8000", "kind": "tm:ltm:pool:members:membersstate", "dynamicRatio": 1, "inheritProfile": "enabled", "logging": "disabled", "monitor": "default", "priorityGroup": 0, "rateLimit": "disabled", "ratio": 1, "session": "user-enabled" } You might also note the session keyword in the pool member attributes as well. This is the key that controls the forced offline behavior. The mappings for these two values (state and session) to the GUI state of a pool member are as follows GUI: Enabled {"state": "unchecked", "session": "user-enabled"} GUI: Disabled {"state": "unchecked", "session": "user-disabled"} GUI: Forced Offline {"state": "user-down", "session": "user-disabled"} So to change a value on a pool member, you need to use the PUT method, and specify in the URL the pool, pool name, and the pool member: curl -sk -u admin:admin https://192.168.6.5/mgmt/tm/ltm/pool/testpool/members/~Common~192.168.101.11:8000/ \ -H "Content-Type: application/json" -X PUT -d '{"state": "user-down", "session": "user-disabled"}' This results in changed state and session for this pool member: { "state": "user-down", "connectionLimit": 0, "address": "192.168.101.11", "selfLink": "https://localhost/mgmt/tm/ltm/pool/testpool/members/~Common~192.168.101.11:8000?ver=11.5.1", "generation": 63, "fullPath": "/Common/192.168.101.11:8000", "partition": "Common", "name": "192.168.101.11:8000", "kind": "tm:ltm:pool:members:membersstate", "dynamicRatio": 1, "inheritProfile": "enabled", "logging": "disabled", "monitor": "default", "priorityGroup": 0, "rateLimit": "disabled", "ratio": 1, "session": "user-disabled" } Best tip I can give with discovering the nuances of iControl REST is to query existing objects, and change their default values around in the GUI and re-query to see what the values are supposed to be. Happy coding!
HA Group and pools
Hi, According to what I read it seems that HA Group (HAG) is best suited for monitoring trunks and clusters (on VIPRION). Still pools can be used as well. My question is about what is best practice for configuring pools in HAG. I know article Best practices for the HA group feature - there is not a lot here except from avoiding pools with members that are not stable (can go down and up rapidly). I can see two scenarios when using pool makes sense: Same pool used on each device in HAG - each device has completely separate network path to members. So it is possible that member is down on one device and up on another. Quite simple to configure. Separate pools on each device pointing to different members - that is one that I am not sure how to implement. Second case is showed in this video Setting up HA Groups (part 2 of 2). One of the condition is that each device should have not only separate pool (A, B, C) but as well separate VS using those pools like that: BIG-IPA - VSA - PoolA BIG-IPB - VSB - PoolB ... As well easy to configure but there is one catch - in case of failover VS IP will change, so connections will be lost and there is some external method necessary to direct clients to new VIP - Am I right? So not a perfect solution. I can imagine that there is a way to switch pools assigned to the same VS depending on which device is Active (using iRule with HA::status and tcl_platform(machine)) - but is that good idea? Sure connections will be reset as well but there is no need to redirect clients to other VIP. Any other way to have same VIP on every device but using separate pools for HAG config? Any other scenarios for using pools in HAG? Piotr
HA Group and pools
Hi, According to what I read it seems that HA Group (HAG) is best suited for monitoring trunks and clusters (on VIPRION). Still pools can be used as well. My question is about what is best practice for configuring pools in HAG. I know article Best practices for the HA group feature - there is not a lot here except from avoiding pools with members that are not stable (can go down and up rapidly). I can see two scenarios when using pool makes sense: Same pool used on each device in HAG - each device has completely separate network path to members. So it is possible that member is down on one device and up on another. Quite simple to configure. Separate pools on each device pointing to different members - that is one that I am not sure how to implement. Second case is showed in this video Setting up HA Groups (part 2 of 2). One of the condition is that each device should have not only separate pool (A, B, C) but as well separate VS using those pools like that: BIG-IPA - VSA - PoolA BIG-IPB - VSB - PoolB ... As well easy to configure but there is one catch - in case of failover VS IP will change, so connections will be lost and there is some external method necessary to direct clients to new VIP - Am I right? So not a perfect solution. I can imagine that there is a way to switch pools assigned to the same VS depending on which device is Active (using iRule with HA::status and tcl_platform(machine)) - but is that good idea? Sure connections will be reset as well but there is no need to redirect clients to other VIP. Any other way to have same VIP on every device but using separate pools for HAG config? Any other scenarios for using pools in HAG? Piotr
