Red Hat Summit2. Installation-Related Notes
This section includes information specific to Anaconda and the installation of Red Hat Enterprise Linux 5.3.
Red Hat Network can install the new and changed packages and upgrade an existing Red Hat Enterprise Linux 5 system. Alternatively, Anaconda can upgrade an existing Red Hat Enterprise Linux 5 system or perform a fresh installation of Red Hat Enterprise Linux 5.3.
Note: upgrading from beta releases of Red Hat Enterprise Linux 5.3 to this GA release is not supported.
Further, although Anaconda provides an option for upgrading from earlier major versions of Red Hat Enterprise Linux to Red Hat Enterprise Linux 5.3, Red Hat does not currently support this. More generally, Red Hat does not support in-place upgrades between any major versions of Red Hat Enterprise Linux. (A major version is denoted by a whole number version change. For example, Red Hat Enteprise Linux 4 and Red Hat Enterprise Linux 5 are both major versions of Red Hat Enterprise Linux.)
In-place upgrades across major releases do not preserve all system settings, services or custom configurations. Consequently, Red Hat strongly recommends fresh installations when upgrading from one major version to another.
2.1. All Architectures
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- The installation of Anaconda now offers the option of switching to Virtual Network Computing (VNC) to complete the installation.
- Creating or using encrypted software RAID member disks (i.e.
software RAIDpartitions) is not supported. However, creating encrypted software RAID arrays (e.g./dev/md0) is supported. - The NFS default for RHEL5 is "locking". Therefore, to mount nfs shares from the %post section of anaconda, use the
mount -o nolock,udpcommand to start the locking daemon before using nfs to mount shares. - When installing from CD-ROM or DVD-ROM on a system with an iBFT-configured network device, Anaconda will not include any iBFT-configured storage devices unless networking is configured. To enable networking for the installation, use the command
linux updates=http://[any]at the installation boot prompt. Note that[any]can be replaced with any URL.If your system requires a static IP configuration, use the commandlinux updates=http://[any] ip=[IP address] netmask=[netmask] dns=[dns]. - When installing Red Hat Enterprise Linux 5.3 on a fully virtualized guest, do not use the
kernel-xenkernel. Using this kernel on fully virtualized guests can cause your system to hang.If you are using an Installation Number when installing Red Hat Enterprise Linux 5.3 on a fully virtualized guest, be sure to deselect theVirtualizationpackage group during the installation. TheVirtualizationpackage group option installs thekernel-xenkernel.Note that paravirtualized guests are not affected by this issue. Paravirtualized guests always use thekernel-xenkernel. - If you are using the Virtualized kernel when upgrading from Red Hat Enterprise Linux 5 to 5.2, you must reboot after completing the upgrade. You should then boot the system using the updated Virtualized kernel.The hypervisors of Red Hat Enterprise Linux 5 and 5.2 are not ABI-compatible. If you do not boot the system after upgrading using the updated Virtualized kernel, the upgraded Virtualization RPMs will not match the running kernel.
- When upgrading to Red Hat Enterprise Linux 5.1 or later from Red Hat Enterprise Linux 4.6,
gcc4may cause the upgrade to fail. As such, you should manually remove thegcc4package before upgrading. - The
firstbootlanguage plugin has been removed, as it does not properly and completely reconfigure the system when a new language is selected. - When provisioning guests during installation, the option will not be available. When this occurs, the system will require an additional entitlement, separate from the entitlement used by
dom0.To prevent the consumption of additional entitlements for guests, install therhn-virtualization-commonpackage manually before attempting to register the system to Red Hat Network. - Installing Red Hat Enterprise Linux 5.3 on a system with multiple network interfaces and manually specified IPv6 addresses may result in a partially incorrect networking setup. When this occurs, your IPv6 settings will not be visible on the installed system.To work around this, set
NETWORKING_IPV6toyesin/etc/sysconfig/network. Then, restart your network connection using the commandservice network restart. - If your system has
yum-rhn-plugin-0.5.2-5.el5_1.2(or an earlier version) installed, you will be unable to upgrade to Red Hat Enterprise Linux 5.3 throughyum update. To work around this, upgrade youryum-rhn-pluginto the latest version (usingyum update yum-rhn-plugin) before runningyum update. - Previously, anaconda could not access more than 8 SmartArray controllers. In this update, this issue has been resolved.
- A driver disk, supplied by an OEM, is a single image file (*
.img), containing potentially multiple driver packages and kernel modules. These drivers are used during installation to support hardware that otherwise would not be recognized by Red Hat Enterprise Linux 5. Once the driver packages and kernel modules are installed on the system, they are placed in the initial RAM disk (initrd) so that they are loaded when the system boots.With this release, installation can automatically detect a driver disk (based on its file system label), thereby using the content of that disk during installation. This behavior is controlled by the installation command line optiondlabel=on, which enables the automatic search.dlabel=onis the default setting for this release.All block devices with the file system labelOEMDRVare examined and drivers are loaded from these devices in the order by which they are detected. - Existing encrypted block devices that contain
vfatfile systems will appear as typeforeignin the partitioning interface; as such, these devices will not be mounted automatically during system boot. To ensure that such devices are mounted automatically, add an appropriate entry for them to/etc/fstab. For details on how to do so, refer toman fstab.
2.2. PowerPC Architectures
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- The minimum RAM required to install Red Hat Enterprise Linux 5.2 is 1GB; the recommended RAM is 2GB. If a machine has less than 1GB RAM, the installation process may hang.Further, PowerPC-based machines that have only 1GB of RAM experience significant performance issues under certain RAM-intensive workloads. For a Red Hat Enterprise Linux 5.2 system to perform RAM-intensive processes optimally, 4GB of RAM is recommended. This ensures the system has the same number of physical pages as was available on PowerPC machines with 512MB of RAM running Red Hat Enterprise Linux 4.5 or earlier.
2.3. s390x Architectures
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anacondanow supports both ports on CHPID for OSA Express3 cards. The installer will prompt for the port number in the initial stage of the installation. The value provided for the port also affects installed network interface startup script. When port 1 is selected, the valueportno=1is added to OPTIONS parameter ofifcfg-eth*file.Note
When installing under z/VM, you can add eitherPORTNO=0(to use port 0) orPORTNO=1(to use port 1) to the CMS configuration file to avoid being prompted for the mode.- Installation on a machine with existing Linux or non-Linux filesystems on DASD block devices may cause the installer to halt. If this happens, it is necessary to clear out all existing partitions on the DASD devices you want to use and restart the installer.
2.4. ia64 Architecture
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- If your system only has 512MB of RAM, attempting to install Red Hat Enterprise Linux 5.3 may fail. To prevent this, perform a base installation first and install all other packages after the installation finishes.
- Using
yumto install packages from the32-bit Compatibility Layerdisc may fail. If it does, it is because the Red Hat package signing key was not imported into the RPM database. This happens if you have not yet connected to Red Hat Network and obtained updates. To import the key manually, run the following command as root:rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-releaseCopy to Clipboard Copied! Toggle word wrap Toggle overflow Once the Red Hat GPG key is imported, you may now useyumto install packages from the32-bit Compatibility Layerdisc.Note that when installing from this disc, it is advisable to useyuminstead ofrpmto ensure that base OS dependencies are addressed during installation.
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