What I need is to pull JUST the node key (which is variable based on how many servers are entered...could be node0-node199).   [emphases added]

From the quote from the OP and from the examples therein, I get the notion that the pattern is best described as "the literal 'node' at the start of a string, immediately followed by 1 to 3 (and no more) decimal digits". The regex  /(node[0-9]*)/ matches  'node' anywhere, followed by any number (including zero) of digits. IMHO, a better (because more specific) regex would be
    m{ \A (node \d{1,3}) (?! \d) }xms
(which has not been tested).

In reply to Re: Partial string match -- with a twist. by AnomalousMonk
in thread Partial string match -- with a twist. by smw6181

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.