Understanding docker directory structure


I have docker installed on my Fedora box. Here I try to understand the structure of its directories. [root@mylab docker]# docker version Client version: 1.5.0 Client API version: 1.17 Go version (client): go1.3.3 Git commit (client): a8a31ef/1.5.0 OS/Arch (client): linux/amd64 Server version: 1.5.0 Server API version: 1.17 Go version (server): go1.3.3 Git commit (server): a8a31ef/1.5.0 … Continue reading Understanding docker directory structure

Cannot click vSphere Client Security Warning dialog buttons


I met the same issue described in this VMware KB, unfortunately none of the solutions worked for me. Symptoms When logging in with the vSphere Client you see a Security Warning dialog with a message similar to:An untrusted SSL certificate is installed on "<hostname>" and secure communication cannot be guaranteed. Depending on your security policy, this issue might not … Continue reading Cannot click vSphere Client Security Warning dialog buttons

Set up Puppet lab in docker


Just finished my first docker set up - building a puppet server and a puppet client in two separate containers. 1) My docker host is Fedora 20. [root@1004521 ~]# cat /etc/system-release Fedora release 20 (Heisenbug) 2) Install docker (https://docs.docker.com/installation/fedora/) [root@1004521 ~]# yum -y install docker-io [root@1004521 ~]# systemctl start docker [root@1004521 ~]# systemctl enable docker … Continue reading Set up Puppet lab in docker

Missing NIC in cloned VirtualBox VM


If you ever encounter similar error 'Device eth0 does not seem to be present, delaying initialization' in the cloned VirtualBox VM, the fix is to remove this file (/etc/udev/rules.d/70-persistent-net.rules) and reboot the VM. The reason is that the new cloned VM generates new MAC addresses which do not match the previous ones that have been recorded … Continue reading Missing NIC in cloned VirtualBox VM