Forum Discussion

Robbie_Wiley_78's avatar
Robbie_Wiley_78
Icon for Nimbostratus rankNimbostratus
Jan 29, 2015

How do I read the send string for a monitor using powershell icontrol?

I have an (unknown) number of monitors that look at an asp page. I need to create an equivalent monitor for each of these that looks at the new htm page. My thought was to script this using powershell and icontrol. I want to look at all the send string on each monitor on an LTM, if the send string contains the name of the asp page, create a new monitor based on that monitor name referencing the new htm page.

But I can't seem to pull the send string off the monitor. I've googled around and i see examples for listing, adding and removing monitors - but not listing the details of a monitor.

I'm currently (failing) using the following:

$sv = New-Object -TypeName iControl.LocalLBMonitorStringValue
$sv.type = 'STYPE_SEND'
$monitorname = 'rollout'
$Control.locallbmonitor.get_template_user_defined_string_property(@($monitorname),@($sv.type))

I get the following error:

Exception calling "get_template_user_defined_string_property" with "2" argument(s): "Exception caught in
LocalLB::urn:iControl:LocalLB/Monitor::get_template_user_defined_string_property()
Exception: Common::OperationFailed
    primary_error_code   : 16908342 (0x01020036)
    secondary_error_code : 0
    error_string         : 01020036:3: The requested monitor parameter (rollout_HTTPS 1 STYPE_SEND=) was not found."
At line:1 char:89
+ ... lout_HTTPS"),@($sv.type))
+                    ~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : SoapHeaderException
application delivery
devops
iControl
LTM
microsoft powershell with icontrol

1 Reply

Sort By
  • bonny_11145's avatar
    bonny_11145
    Historic F5 Account
    Jan 29, 2015

    Hi Robbie,

    Are you open to use another scripting approach? If so, I'd recommend using iControlREST. It's rather easy, reasonably documented and can be used to accomplish most automation tasks.

    It's easy to get started with it using curl and/or the postman plugin for chrome. You can then use something like python to automate...

    For your query the iControlREST query can be performed using the following command:

     curl -s -k -u admin:admin -H "Content-Type: application/json" -X GET https://a.b.c.d/mgmt/tm/ltm/monitor/http?$select=name,send

    This returns the following sample output for me:

    {
"kind": "tm:ltm:monitor:http:httpcollectionstate",
"selfLink": "https://localhost/mgmt/tm/ltm/monitor/http?$select=name%2Csend&ver=11.6.0",
"items": [
    {
        "name": "http",
        "send": "GET /\\r\\n"
    },
    {
        "name": "http_head_f5",
        "send": "HEAD / HTTP/1.0\\r\\n\\r\\n"
    },
    {
        "name": "m_http",
        "send": "GET /\\r\\n"
    }
]
}

    In the above, m_http is a custom http monitor I created. You can clearly see the monitor name and send string.

    Hope this helps,

    Cheers,

    Bonny