This section describes the Cluster Manager, eMake, and Electric Agent/EFS installation prerequisites on Linux platforms. It also describes a known Linux kernel performance issue.
For information about platform support such as operating systems, cloud-based and Kubernetes support, Make versions, eMake emulation, databases, bitnesses, and Visual Studio versions, see CloudBees Accelerator Supported Platforms.
Supported kernel versions
CloudBees Accelerator supports these specific Linux kernel versions.
CentOS 7.5-1804, kernel 3.10.0-862 |
CentoS 7.4-1708, kernel 3.10.0-693 |
|
Debian 9, kernel 4.9 series |
Debian 8, kernel 3.16 series |
Debian 7, kernel 3.2 series |
RHEL 8.0, kernel 4.18.0-80 RHEL 7.7, kernel 3.10.0-1062 RHEL 7.6, kernel 3.10.0-957 RHEL 7.5, kernel 3.10.0-862 RHEL 7.4, kernel 3.10.0-693 RHEL 7.3, kernel 3.10.0-514 RHEL 7.2, kernel 3.10.0-327 RHEL 7.1, kernel 3.10.0-229 RHEL 7.0, kernel 3.10.0-123 |
RHEL 6.10, kernel 2.6.32-754 RHEL 6.9, kernel 2.6.32-696 RHEL 6.8, kernel 2.6.32-642 RHEL 6.7, kernel 2.6.32-573 RHEL 6.6, kernel 2.6.32-504 RHEL 6.5, kernel 2.6.32.431 RHEL 6.4, kernel 2.6.32.358 RHEL 6.3, kernel 2.6.32.279 RHEL 6.2, kernel 2.6.32.220 |
RHEL 6.1, kernel 2.6.32.131 RHEL 6.0, kernel 2.6.32.71 RHEL 5.5+, kernel 2.6.18-x RHEL 5.4, kernel 2.6.18-164 |
SLES 15, kernel 4.12.14 SLES 12 SP4, kernel 4.12.14 |
SLES 12, kernel 3.12.28 SLES 11 SP2, kernel 3.0.10 |
SLES 11 SP1, kernel 2.6.32 SLES 11, kernel 2.6.27 |
Ubuntu 18.04, kernel 4.18 Ubuntu 18.04, kernel 4.15 Ubuntu 17.10, kernel 4.13 Ubuntu 17.04, kernel 4.10 |
Ubuntu 16.10, kernel 4.8 Ubuntu 16.04, kernel 4.4 Ubuntu 15.10, kernel 4.2 |
Ubuntu 15.04, kernel 3.19 Ubuntu 14.10, kernel 3.16 Ubuntu 14.04, kernel 3.13 |
Linux Prerequisites
-
Each host to run Accelerator software must be x86-64 compatible.
-
SELinux must be disabled. To disable SELinux, open
/etc/selinux/config
and changeSELINUX=enforcing
toSELINUX=disabled
. -
The following packages must be installed on each host that will run the Cluster Manager or agents.
The installer prompts you to install missing prerequisite libraries. If installation of these libraries fails, the installer displays the command that you must enter to install them afterward.
For your reference, following are the commands that you can use to install the required packages:
Known Linux kernel issue affecting performance
Affected kernel versions
This applies to RHEL kernel versions later than 2.6.18-194.32 and earlier than 2.6.32-131.
Symptoms
Affected systems might encounter reduced performance on both ext3 and ext4 file systems. Symptoms might include:
-
hung_task_timeout_secs
messages in system dmesg logs -
widely variable agent availability (entering and exiting agent “penalty” status frequently)
-
contention over the
ecagent.state
file -
slower builds (with unexplained variances)
To help determine if your environment has this kernel issue, run
dmesg | grep hung_task_timeout
hung_task_timeout errors indicate a known Linux kernel issue. Contact your kernel provider to obtain a different version of the precompiled kernel.
Corrective actions
For systems running RHEL 5.6, 5.7, 5.8, and 6.0, consider upgrading to 2.6.32-131 (RHEL 6.1) or downgrading to 2.6.18-194.32 (RHEL 5.5).
Upgrading the kernel might require you to reinstall various kernel modules such as video drivers, efs, and vm-tools. You can do so by running apt-get dist-upgrade
and then rebooting.