why is kubernetes using its own base64 format?

Question

When I use base64 inside Ubuntu to encode admin, I get: YWRtaW4K. But when I see secret in kubernetes I get YWRtaW4=.

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Answer 1

You need to remove the trailing newline character from the input; you can use the -n switch to trim the trailing new line from the echo command and get the same behavior as seen with the Kubernetes secrets.

echo -n  "admin" |base64
YWRtaW4=


echo -n "YWRtaW4=" |base64 -d
admin