Comments 8 Posted In Red Hat OpenShift Container Platform Tags openshift Extend Disk on Red Hat CoreOS Latest response 2021-07-05T08:19:41+00:00 Guys, I have OCP 4.2 deployed but need to extend the disk size on my master and worker nodes. Is there a guide on how to do this and can it be done online? Started 2019-11-18T09:30:19+00:00 by Darragh O'Shaughnessy Active Contributor 332 points Log in to join the conversation Responses Sort By Oldest Sort By Newest Active Contributor 332 points 13 January 2020 11:42 PM Darragh O'Shaughnessy Anyone? Guru 17961 points 14 January 2020 1:03 AM RJ Hinton Community Leader Hi Darragh, We're hoping to be able to test OCP sometime in the future where we work, and we've not used it. Since this is a supported product, I recommend submitting a new case with Red Hat and make it a priority. Please let them know the nature of your storage, I say this because from what I see at https://docs.openshift.com/container-platform/4.2/storage/expanding-persistent-volumes.html might or might not be something that describes your storage. Regardless, your storage is not a simple matter, which you probably certainly already know. I'd be remiss to attempt to give you advice when I've only used OCP through online providers, and only now are we considering one for where we work. Red-Hatters do occasionally frequent the discussion forum, but since this is a supported product, and you seem to need help sooner than later, please do submit a case RegardsRJ Guru 17961 points 14 January 2020 1:18 AM RJ Hinton Community Leader Darragh, I've asked if any others in the Red Hat Accelerator group (we are not Red-Hatters) might know of this as well. RegardsRJ JR Newbie 14 points 14 January 2020 1:36 AM Jay Ryan What’s is your volume configuration? Everything on root? Are you needing to extend persistent volumes? Have you contacted support? Is this in a cloud provider? VMware? Bare metal? Once you grow the underlying storage you can use the coreos-growpart script on whatever file system you need to. /usr/libexec/coreos-growpart /sysroot https://access.redhat.com/solutions/4608041 Guru 17961 points 14 January 2020 3:38 AM RJ Hinton Community Leader Darragh, Jay Ryan above is another member of the Red Hat Accelerator program. While we are not Red Hat employees, the Accelerator group has a lot of experts in our group with various specialties such as Jay. I generally deal with Linux and Satellite and sometimes other things. Please expand your details and see his post just above, even if you post here, and certainly for the priority case you've opened already with Red Hat. RegardsRJ DY Red Hat Active Contributor 161 points 14 January 2020 3:27 PM Daniel Yocum All - As far as I know, due to the nature of CoreOS being immutable and encrypted, you can not extend the root volume after the OS has been deployed. That said, if you use AWS you should be able to create/replace nodes with the correct volume sizes during installation or scaleup (i.e., to replace a master or worker with a too small root volume) as is outlined in this document: https://github.com/openshift/installer/blob/master/CHANGELOG.md#fixed-7 NB: I have not tried this myself and would be interested in the results if someone here does attempt this. RD Newbie 5 points 14 January 2020 4:13 PM Roberto Docampo Suárez We've OCP 4.2 with CoreOS (vsphere) and no problems to growing the FS (I do it). I extend the disk on the hypervisor and later on the node --> (sudo /usr/libexec/coreos-growpart /sysroot ) MK Community Member 58 points 5 July 2021 8:19 AM Madhusudan Kulkarni Is there RH step-by-step KB where we can verify if can increase the disk size on vsphere and on a node we can expand the size on the worker node.