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Bash, Linux

Kickstart Tutorial – Practical Examples for RHEL 7 / CentOS 7

kickstart tutorial Red Hat 7 CentOS 7
Linux installation can be performed totally unattended using Kickstart file, which contains configuration, required setup and post installation tasks to fully automate installation process without being prompted for any input details. Kickstart file can be placed in the remote repository or can be included in ISO image in order to be read by Anaconda installer during system installation.

In this tutorial we present some practical solutions that can be placed in kickstart file to automate CentOS 7 / Red Hat 7 installation tasks.
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Cloud Computing, Linux

Extending Minimum Time Between IPMI Operations in OpenStack Ironic

Sep 29, 2018 by Grzegorz Juszczak 0 Comments error rebooting node after deploy, failed set node power state, ironic node time out error, openstack ironic error rebooting node, openstack tripleo pike ipmi timeout, pike ironic minimum command interval, tripleo ironic extend time ipmi, tripleo ironic failed power on, tripleo ironic timed out 60

In TripleO based installations of OpenStack the deployment of Overcloud nodes is coordinated by so called Ironic module, which was developed in general to deploy OS on bare metal servers. There is a number of IPMI (Intelligent Platform Management Interface) drivers supported by Ironic, like pxe_ilo for HP Proliant Gen8+, pxe_drac for DELL 12G+, ipmi for generic servers, etc… In case of the generic ipmi driver, Ironic script, which is installed on undercloud (or OSP director), uses a Linux command line ipmitool to send IPMI messages to the Overcloud nodes to control them during TripleO deployment.
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Cloud Computing, Linux

OpenStack Pike TripleO Undercloud and Overcloud Deployment on 3 Bare Metal Servers

Jul 18, 2018 by Grzegorz Juszczak 3 Comments openstack ironic ipmi bmc, openstack pike ironic baremetal, openstack pike tripleo deployment, openstack tripleo three servers, openstack tripleo tutorial, openstack tripleo undercloud overcloud, pike tripleo baremetal deployment, tripleo ironic ipmi bmc, tripleo ironic node introspect, tripleo undercloud installation

Nowadays Packstack based OpenStack installations are used for proof-of-concept and demonstration purposes only. The official RDO community points TripleO (OpenStack On OpenStack) as a recommended OpenStack deployment method for production cloud. TripleO is an automated installation tool, based on Ironic OpenStack node provisioning software, intended for deployments on bare metal servers, that is, on physical hardware. TripleO generally requires using servers equipped with BMC (Baseboard Management Controller) or IPMI (Intelligent Platform Management Interface) modules, like HPE iLO (integrated Lights Out) in order to be able to manage and controll servers during OpenStack deployment, maintenance and node introspection procedures.
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Linux, Virtualization

Enable UEFI for QEMU KVM on Fedora

May 31, 2018 by Grzegorz Juszczak 0 Comments edk2-ovmf kvm qemu fedora, enable edk2-ovmf fedora 25 kvm, enable ovmf rpm fedora 25, enable uefi qemu kvm fedora, install edk2-ovmf rpm fedora, install ovmf fedora 25 rpm, install uefi rpm fedora 25, open virtual machine firmware fedora, uefi qemu kvm fedora 25, using uefi qemu kvm fedora

UEFI (Unified Extensible Firmware Interface) has become a successfull successor of an outworn and obsolete BIOS firmware. Emulating UEFI based hardware on KVM/QEMU Virtual Machine is possible thanks to so called OVMF (Open Virtual Machine Firmware), which comes from EDK2 (EFI Development Kit), UEFI reference implementation. OVMF is available as an RPM package for RPM based distros (CentOS, Fedora, Red Hat). In case of Fedora release all we need is edk2-ovmf RPM package.
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Linux, Virtualization

How to configure Docker Proxy on CentOS 7, RHEL 7

May 25, 2018 by Grzegorz Juszczak 1 Comments configure proxy docker centos 7, docker http proxy centos 7, docker http proxy rhel 7, docker https proxy centos 7, docker https proxy rhel 7, docker no_proxy centos 7, docker no_proxy rhel 7, docker proxy authentication centos 7, docker proxy authentication rhel 7, enable docker proxy authentication, enable proxy docker rhel 7

How to enable Proxy for Docker engine with or without authentication on CentOS 7, Red Hat Enterprise Linux 7?

Linux, Storage

CentOS 7 Installation with LVM RAID 1 – Mirroring

Mar 31, 2018 by Grzegorz Juszczak 3 Comments centos 7 lvm on raid, centos 7 lvm raid 1, centos 7 raid mdadm lvm, centos mdadm raid 1 mirror, create raid 1 centos 7, install centos 7 raid lvm, install centos with raid 1, install centos with raid lvm, raid 1 mirroring centos 7

CentOS 7 installation with LVM RAID 1 mirroring
CentOS 7 may offer us a possibility of automatic RAID configuration in Anaconda installer, that is during OS installation, once it detects more than one physical device attached to the computer. Mentioned RAID is generally the LVM-RAID setup, based on well known mdadm – Linux Software RAID. It’s a pretty convenient solution, since we don’t need to setup RAID manually after installation, on already running system.

The below procedure presents CentOS 7 testing installation with LVM RAID 1 (Mirroring) on KVM based Virtual Machine with two attached 20GB virtual disks.
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