RHEL 7 supports online disk resize with active partition tables on disk

One of the interesting features in RHEL 7 is the fact that it supports online disk re-sizing even if there is an active partitioning table on the disk. This feature is interesting in case you want to re-size your virtual disk. You can do this online for example in VMWare. If you have a LVM partition on the disk you want to resize then you need to perform the steps described in this article from Red Hat.

In order to resize online a partition which is in use please observe the following steps:

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Policy based routing on RHEL

If you configure multiple network cards in your RHEL machine with more than one gateway then you can use “policy based routing” to configure the network traffic in a way where the traffic will leave the same interface where the traffic came from.

This procedure is described in this Red Hat KCS article.

I also created a Puppet module to configure policy based routing on RHEL 6 / 7. Currently this module does not handle Bond or VLAN tagged interfaces. You can find my module here.

Satellite 6 => Configure multiple network cards with static IP’s during host provisioning on VMWare

Satellite 6 offers the possibility to provision a host with multiple network cards, however an issue is faced when using VMWare in conjuction with Satellite 6 and you want to provision multiple network interfaces with static IP addresses.

What happens is that after the provisioning of a virtual machine is complete, multiple network cards are added, but only the primary interface (which is used for PXE / DHCP during installation) is configured correctly.

I created a workaround to get this working. I described this solution in an official Red Hat KCS article which is now verified by Red Hat Engineering and published to the public. You can find this article here.