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terenty-rezman/wait_for_tcp.sh

Created October 23, 2021 16:16
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docker curl wait for db available
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wait_for_tcp.sh
#!/bin/sh
# wait_for_tcp.sh
# wait for tcp port to become available
# usage
# $ ./wait_for_tcp localhost:80
host="$1"
until echo -e '\xdclose\x0d' | curl -v telnet://$host/ ; do
>&2 echo "${host} is unavailable - sleeping..."
sleep 1
done
echo "${host} is available"
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