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Why does my Docker container have no Internet Stack Overflow?
The container was attached to at least one non-internal network, so there was nothing wrong with the Compose definition. Restarting the VM / docker daemon did not help. It was also not a DNS issue because the container could not even ping an external IP. What solved it for me was to recreate the docker network (s).
Is there a problem with Docker version 17.09-ce?
Problem still exists for docker version 17.09.0-ce in CentOS 7. The basic idea is: containers should be able to access published ports as other hosts do on the Internet. It’s unreasonable to block containers from accessing public ports.
Can a CentOS 7 container access another centos7 container?
On CentOS 7 and RHEL 7 (and possibly any Linux OS using firewalld) we have the following problem that when at least 2 containers are running on the same host, one container cannot access the network services offered by the other by using the “external” IP address or hostname. The error message returned is host unreachable or no route to host.
How to check for Internet connection in Docker?
Second thing to check is run cat /etc/resolv.conf on the host machine. Docker basically copies the host’s /etc/resolv.conf to the container everytime a container is started.
Which is the latest version of Docker for Ubuntu?
The Docker installation package available in the official Ubuntu 16.04 repository may not be the latest version. To get this latest version, install Docker from the official Docker repository. This section shows you how to do just that.
What should I do if my Docker container is wrong?
Docker basically copies the host’s /etc/resolv.conf to the container everytime a container is started. So if the host’s /etc/resolv.conf is wrong, then so will the docker container. If you have found that the host’s /etc/resolv.conf is wrong, then you have 2 options: