podman

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package utils
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import (
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	"fmt"
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	"net"
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	"strconv"
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)
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// Find a random, open port on the host.
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func GetRandomPort() (int, error) {
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	l, err := net.Listen("tcp", ":0")
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	if err != nil {
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		return 0, fmt.Errorf("unable to get free TCP port: %w", err)
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	}
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	defer l.Close()
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	_, randomPort, err := net.SplitHostPort(l.Addr().String())
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	if err != nil {
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		return 0, fmt.Errorf("unable to determine free port: %w", err)
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	}
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	rp, err := strconv.Atoi(randomPort)
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	if err != nil {
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		return 0, fmt.Errorf("unable to convert random port to int: %w", err)
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	}
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	return rp, nil
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}
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