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PSFletchTheTek's avatar
PSFletchTheTek
Icon for MVP rankMVP
Jun 18, 2021

tmsh-tcl newbie help - How to user tmsh-tcl to change the APM Policy on virtual servers

Hi All,

So i'm a tmsh-tcl newbie, but from what i can see i think its what i need but i'm also a open book if someone can suggest a better way of doing it.

So i have 30 virtual servers all using the same APM policy, to make a update i am taking a copy of the live policy, renaming it making my changes and then going through all of my virtual servers to apply the changes. So in the thinking of there must be a better way of doing this i have found tmsh-tcl.

So what i'd like to do is to task the code to

Get a list of all virtual servers

Check if the virtual server has APM Policy A assigned to it.

If it does then change this to Policy B

 

Can anyone show me any examples of how i can piece this together please? Or if there is a better way of doing this?

 

Thanks

 

Pete

 

application delivery
LTM
TMSH
  • AlexBCT's avatar
    AlexBCT
    Icon for Cumulonimbus rankCumulonimbus
    Jun 22, 2021

    Mornin' sir!

     

    I've got part of an answer for you - hope it helps to get the full thing to work.

     

    The command

    tmsh list ltm virtual one-line | grep apm_policy_old | awk '{print $3}'

    should give you a full list of all virtual servers that contain the specific APM policy. If you then put this in a "for" loop or something similar, together with the following two commands, it should do the trick.

     

    modify ltm virtual vs1 profiles del { apm_policy_old }

    modify ltm virtual vs1 profiles add { apm_policy_new }

     

    Be careful not to use the "replace" command in the modify option as it replaces ALL profiles, rather than just the APM profile ("replace" is short for "replace-all-with").

     

    Alternatively, if you are unlikely to make big mistakes in your APM policy (but still want to take a policy backup in case you do), you can also make a copy of the policy before you start, and then work on the original, rather than work on the copy. This will save you the hassle of changing them over.

     

    Hope this helps.