validate the kubernetes version using regex

Question

I am looking for the right regex to validate the kubernetes version before i create the cluster. here are few examples kubernetes version. Can somebody please help on finding the right regex.

    1.18.6-gke.4801",
    1.17.9-gke.1504
    1.17.9-gke.6300

I am not looking for a specific version. it should always comply with the all the mentioned version type. — akhinair, Oct 13 '20 at 02:04
not sure if bash support \d, so can i try using [0-9] instead of \d: — akhinair, Oct 13 '20 at 02:29
Please add your desired output (no description) for that sample input to your question (no comment). — Cyrus, Oct 13 '20 at 03:33

1218985 · Accepted Answer · 2020-10-13T04:30:45.410

-1

You might want to try something like this:

if [[ $GKE_VERSION =~ ^[0-9]+\.[0-9]+\.[0-9]-gke\.[0-9]+$ ]]; then
    echo "OK: Good GKE Version: ${BASH_REMATCH[0]}"
else
    echo "Bad GKE Version"
fi

Or something like this may be:

[[ "1.17.9-gke.1504" =~ ^[0-9]{,2}\.[0-9]{,2}\.[0-9]{,2}-gke\.[0-9]{4}$ ]] && echo "Good GKE Version" || echo "Bad GKE Version"

edited Oct 13 '20 at 04:30

answered Oct 13 '20 at 04:18

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validate the kubernetes version using regex

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