error: nc: getaddrinfo: Name or service not known

I got a error when I docker run the image:lasted.

nc: getaddrinfo: Name or service not known
waiting for mysql to start

and i foud the file entrypoint.sh wite the code:
# Wait for the mysql container to be ready
while ! nc -z mysql 3306; do
echo "Waiting for mysql to start";
sleep 1;
done;

below is console dump
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known
Waiting for mysql to start
nc: getaddrinfo: Name or service not known

[denzuko]

This sort of error usually comes when one container does not know the "hostname" of the other. When deploying be sure to either use links or container networks.