Linux in the Cloud series

WalterS-NC

Hello,

The series ends with Linux as a Docker Host and there is mention that there will be a subsequent episode with a walk through on how to spin up docker containers. I do not see anything on the Google Calendar for this subsequent episode to be recorded and wanted to ask if it is still scheduled to be added.

BTW, I like this content very much and have been taking notes for my own edification and enjoying doing so.

Thanks.

-Walter Schulze

Angie

@WalterS-NC Glad you are enjoying the content! I see two episodes on Linux as a Docker Container after the Docker Host episode. Let me know if you have any issues finding them. Enjoy!

WalterS-NC

sure enough. Must of been added after. I'm off to watch them both. Thanks!

WalterS-NC

btw, I have been fighting for the past few days with the /etc/sysconfig/docker OPTIONS directive.

Anytime I add the -H tcp://0.0.0.0:2375 and start docker, there are the below msgs in journalctl and when I try to run a docker command, I get the response "cannot connect to the Docker daemon. Is the docker daemon running on this host?".

Shutting down firewalld doesn't solve the problem.

I also tried adding the below two commands with firewalld running and it too did not solve the problem.
sudo firewall-cmd --zone=public --add-port=2375/tcp
sudo firewall-cmd --zone-public --add-port=2375/tcp --permanent

Any help would be appreciated. I have docker on a RHEL 7.4 host. Google searches have been inconclusive so far.

MSGS::
Sep 17 16:07:00 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -D OUTPUT -m addrt
Sep 17 16:07:00 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -D PREROUTING' fai
Sep 17 16:07:00 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -D OUTPUT' failed:
Sep 17 16:07:00 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -X DOCKER' fail
Sep 17 16:07:00 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -X DOCKER-ISOLA
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -n -L DOCKER' fail
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -C DOCKER-ISOLA
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -C DOCKER -i docke
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -D FORWARD -i docker0 -o
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -C PREROUTING -m a
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -C OUTPUT -m addrt
Sep 17 16:07:01 qemu-kvm.clt01 dockerd-current[13353]: time="2017-09-17T16:07:01.297529385Z" level=info msg="Default bridg
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -C POSTROUTING -s
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t nat -C DOCKER -i docke
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -D FORWARD -i docker0 -o
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -C FORWARD -i d
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -C FORWARD -i d
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -C FORWARD -o d
Sep 17 16:07:01 qemu-kvm.clt01 firewalld[5293]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w2 -t filter -C FORWARD -o d