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Velmathan's avatar
Velmathan
Level 4
11 years ago
Solved

Need to add new node in existing VCS

Hi All,

I want to add new node in existing 3 node cluster without disturbing the service. Can you please let me know the steps ?

 

Thanks

Vel

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  • mikebounds's avatar
    mikebounds
    11 years ago

    If you don't need to change llttab (i.e you have no exclude line in there) and only have to change llthosts and gabtab, then you do not need to restart LLT and GAB or VCS.  If you add new hosts to llthosts on existing nodes, then when you start llt and gab on new node, then existing nodes should just see new node.

    LLT constantly looks for nodes on all available llt ids, unless you have a line like "exclude 3-31" in your llttab which tells LLT NOT to look.  If you do have "exclude" line then you need to remove or change in llttab and then you would need to force stop VCS and restart GAB and LLT.

    Mike

  • Velmathan's avatar
    Velmathan
    Level 4
    11 years ago

    Hi Mike,

    I seen the procedure and I want to do this in production environment. After adding the new node in gab and llt config file in existing node we need to restart the gab and llt.. Will it affect the existing service??? I want to make sure it should not affect any service which are running... 

     

    Thanks

    Vel

  • mikebounds's avatar
    mikebounds
    Level 6
    11 years ago

    Unless you have "include" or "exclude" lines in llttab, you shouldn't need to restart LLT and GAB after adding new node to llthosts and changing gabtab.

    Mike

  • Velmathan's avatar
    Velmathan
    Level 4
    11 years ago

    Thanks for this info. so i can stop the cluster service by giving hastop -all -force. (it will run keep the service group online) I can put entry in llthosts and gabtab. We need to keep the same main.cf config in all the nodes and i can start cluster service using hastart..

    Is this correct?

     

    Thanks

    Vel

  • mikebounds's avatar
    mikebounds
    Level 6
    11 years ago

    If you don't need to change llttab (i.e you have no exclude line in there) and only have to change llthosts and gabtab, then you do not need to restart LLT and GAB or VCS.  If you add new hosts to llthosts on existing nodes, then when you start llt and gab on new node, then existing nodes should just see new node.

    LLT constantly looks for nodes on all available llt ids, unless you have a line like "exclude 3-31" in your llttab which tells LLT NOT to look.  If you do have "exclude" line then you need to remove or change in llttab and then you would need to force stop VCS and restart GAB and LLT.

    Mike