By Chris Kawalek-Oracle on Feb 05, 2015
This is exciting news for Oracle Linux and for the Docker community. Please read the press release to get all the details.
This is exciting news for Oracle Linux and for the Docker community. Please read the press release to get all the details.
I wanted to quickly draw your attention today to a couple of updates. First, Spacewalk 2.2 for Oracle Linux is available on our public yum server. We have also published the Release Notes, including upgrade instructions from Spacewalk 2.0.
If you're interested in Spacewalk, you might enjoy a webcast we did in November that goes into a lot of detail on using Oracle Linux and Spacewalk together. You can watch that webcast on-demand.
And second, RPMs for the Oracle Instant Client are now available on Unbreakable Linux Network.
Have a great week and we'll see you next Friday!
Happy Friday and happy new year! Our spotlight this week is on an excellent webcast from our archives titled "Oracle Linux Management Demystified." It describes the integration between Oracle Linux and Oracle Enterprise Manager 12c, allowing you to do provisioning, patching, monitoring, and administration all from a unified console. This is an on-demand webcast, so it will play as soon as you enter your details. Enjoy and we'll see you next week!
Happy Friday, everyone! Just a quick note, this will be the last Friday Spotlight of 2013, we'll pick up again in the new year.
Our spotlight this week is on our excellent new screencast series, covering a variety of topics on Oracle Linux.
(click to jump to Oracle Media Network to play)
Managing Your Oracle Linux Environment
Oracle Linux: Maximize Performance, Minimize Downtime
Oracle Linux – Reliability, Availability, and Scalability
We'll see you in the new year!
The Oracle Enterprise Manager Agent Preinstall RPM installs the required software packages and prepares the operating system for Oracle Enterprise Manager Agent deployment. It has recently been made available for both x86_64 and i386 platforms from the ol6_addons repository on the public-yum server and the Unbreakable Linux Network.
The Oracle Management Agent (Management Agent) is one of the core components of Enterprise Manager Cloud Control that is deployed on each monitored host. It is responsible for managing and maintaining the hosts and its targets and communicating that information to the middle-tier Oracle Management Service. The Management Agent also allows you to monitor non-Oracle components (such as third-party databases) through management plug-ins and connectors.
Once the Oracle Enterprise Manager agent is deployed on an operating system, the operating system and applications running on that host can be monitored and manged using the Oracle Enterprise Manager 12c console.
The Oracle Enterprise Manager Agent Preinstall package installs the required software packages and sets system parameters necessary to deploy and run the Oracle Enterprise Manager Agent on Oracle Linux 6. In particular, it performs the following tasks to enable the agent deployment:
This RPM may be installed on an existing physical or virtual Oracle Linux 6 system, or may be included in an Oracle VM Template or Oracle Virtual Assembly. Note that the actual agent installation requires 2 GB of free space and 512 MB swap space, and therefore the system image should be configured to meet these requirements.
A. Installing on physical or virtual Linux machine
B. Including the RPM in the system.img disk image inside of an Oracle Virtual Assembly
An Oracle Enterprise Manager installation can be configured such that the Enterprise Manager agent is pushed on the Guest VMs automatically when the Oracle Virtual Assembly is deployed.
To configure the Oracle Management Server (OMS) for automatic agent push, update the following properties in the <OMS_HOME>/sysman/prov/agentpush/agentpush.properties file:
oracle.sysman.prov.agentpush.defaultPdpSetting=/bin/su - %RUNAS% -c "%COMMAND%" oracle.sysman.prov.agentpush.enablePty=true
Spacewalk is a popular Linux management tool that can be used to manage several operating systems, including the Red Hat Enterprise Linux derivatives like CentOS and Scientific Linux, Debian and even Solaris.
While the Spacewalk installation instructions are very thorough, here is a brief guide to installing Spacewalk on Oracle Linux 6. It is possible to install on Oracle Linux 5, but it requires a lot more manual intervention as the Unbreakable Linux Network packages installed on Oracle Linux 5 conflict with some Spacewalk packages. You should use both the Spacewalk installation instructions in combination with this guide to install Spacewalk.
This guide assumes that you are familiar with the Oracle Linux 6 installation process, as well as basic system administration tasks, including registering with the Unbreakable Linux Network (ULN) or configuring YUM to use public-yum.oracle.com. The Oracle Linux 6 Administrator's Solutions Guide provides more information on these tasks.
This guide uses Oracle Linux 6.4 (x86_64). Download Oracle Linux 6.4 from the Oracle Software Delivery Cloud or one of the mirrors. You can choose either to do a "Basic Server" install, or a "Minimal" install. I recommend performing a "Basic Server" install as this provides basic system administration tools. If you are using a previous version of Oracle Linux 6, please ensure it is either registered with the Unbreakable Linux Network or is configured to use public-yum.oracle.com for updates.
You should assign both a fixed hostname as well as a fixed IP address for your Spacewalk server. The hostname should be resolvable via DNS on your network.
Binary packages of Spacewalk are available through YUM repositories at http://yum.spacewalkproject.org/. To use this repository, install the spacewalk-repo package with commands below:
# rpm -Uvh http://yum.spacewalkproject.org/1.9/RHEL/6/x86_64/spacewalk-repo-1.9-1.el6.noarch.rpm
For Spacewalk on Oracle Linux 6, additional dependencies are needed from JPackage. Please configure the following yum repository before beginning your Spacewalk installation:
cat > /etc/yum.repos.d/jpackage-generic.repo << EOF [jpackage-generic] name=JPackage generic #baseurl=http://mirrors.dotsrc.org/pub/jpackage/5.0/generic/free/ mirrorlist=http://www.jpackage.org/mirrorlist.php?dist=generic&type=free&release=5.0 enabled=1 gpgcheck=1 gpgkey=http://www.jpackage.org/jpackage.asc EOF
We specifically want the 5.0 generic directory in the above URL.
Spacewalk requires additional dependencies from the Enterprise Packages for Enterprise Linux (EPEL) repository. To enable this repository run the following command:
# rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
Spacewalk supports either Oracle Database 10g or higher or PostgreSQL 8.4 or higher to store its primary data. While Oracle Database XE is supported by Spacewalk, it is not supported by Oracle. Therefore, we recommend either using an existing Oracle Database Standard or Enterprise Edition server or using PostgreSQL.
Installation of an Oracle Database server is outside the scope of this walk-through. We assume you have an existing Oracle Database server installed and available. The spacewalk user needs to have the CONNECT and RESOURCE roles as well as the ALTER SESSION, CREATE SYNONYM,CREATE TABLE and CREATE VIEW system privileges.
You will also need to make the following code change on your Spacewalk server, after you have installed the Spacewalk software:
# diff -u /etc/sysconfig/rhn/oracle/main.sql-20110504 /etc/sysconfig/rhn/oracle/main.sql --- main.sql-20110504 2011-04-08 21:40:53.000000000 +0200 +++ main.sql 2011-05-04 14:20:24.000000000 +0200 @@ -38940,6 +38940,12 @@ -- Source: data/common/rhnPackageSyncBlacklist.sql + +select lookup_package_name('gpg-pubkey') from dual; + +select lookup_package_name('rhns-ca-cert') from dual; + +select lookup_package_name('rhn-org-trusted-ssl-cert') from dual; insert into rhnPackageSyncBlacklist (package_name_id) values (lookup_package_name('gpg-pubkey'));
Without this change, the Spacewalk installation fails with the following error in /var/log/rhn/populate_db.log:
ORA-02291: integrity constraint (SPACEWALK.RHN_PACKAGESYNCBL_PNID_FK) violated - parent key not found
The Oracle Instant Client packages can be installed from ULN by subscribing to the Oracle Software channel and running the following command:
# yum install oracle-instantclient11.2-basic oracle-instantclient11.2-sqlplus
If you are not subscribed to ULN, you can download the Oracle Instant Client RPMs from the Oracle Technology Network and install them manually.
Once the Oracle Instant Client has been installed, you need to add the library path to ldconfig:
# echo /usr/lib/oracle/11.2/client64/lib > /etc/ld.so.conf.d/oracle-instantclient11.2-basic.conf # ldconfig
If you want to use the PostgreSQL embedded backend on the same server as Spacewalk:
# yum install spacewalk-setup-embedded-postgresql # yum install spacewalk-postgresql
If you want to use an Oracle Database backend:
# yum install spacewalk-oracle
The rest of this guide uses an Oracle Database backend. Don't forget to make the code change listed under Oracle Database Setup before continuing!
The Spacewalk binary packages are missing a dependency on the geronimo-jta-1.1-api RPM, so install it manually:
# yum install geronimo-jta-1.1-api
Your Spacewalk server should have a resolvable FQDN such as 'hostname.domain.com'. If the installer complains that the hostname is not the FQDN, do not use the --skip-fqdn-test flag to skip.
If you installed spacewalk-setup-embedded-postgresql above, run
# spacewalk-setup --disconnected
If you set up the database server manually (either on the same or on a different machine), run
# spacewalk-setup --disconnected --external-db
A sample interactive install:
# spacewalk-setup --disconnected --external-db * Setting up Oracle environment. * Setting up database. ** Database: Setting up database connection for Oracle backend. Database service name (SID)? orcl.domain.com Database hostname [localhost]? spacewalk-db.domain.com Username? spacewalk Password? ** Database: Testing database connection. ** Database: Populating database. *** Progress: ############################################################ * Setting up users and groups. ** GPG: Initializing GPG and importing key. ** GPG: Creating /root/.gnupg directory You must enter an email address. Admin Email Address? firstname.lastname@example.org * Performing initial configuration. * Activating Spacewalk. ** Loading Spacewalk Certificate. ** Verifying certificate locally. ** Activating Spacewalk. * Enabling Monitoring. * Configuring apache SSL virtual host. Should setup configure apache's default ssl server for you (saves original ssl.conf) [Y]? ** /etc/httpd/conf.d/ssl.conf has been backed up to ssl.conf-swsave * Configuring tomcat. ** /etc/sysconfig//tomcat6 has been backed up to tomcat6-swsave ** /etc/tomcat6//server.xml has been backed up to server.xml-swsave ** /etc/tomcat6//web.xml has been backed up to web.xml-swsave * Configuring jabberd. * Creating SSL certificates. CA certificate password? Re-enter CA certificate password? Organization? Oracle Demo Organization Unit [spacewalk.domain.com]? Email Address [email@example.com]? City? Redwood Shores State? CA Country code (Examples: "US", "JP", "IN", or type "?" to see a list)? US ** SSL: Generating CA certificate. ** SSL: Deploying CA certificate. ** SSL: Generating server certificate. ** SSL: Storing SSL certificates. * Deploying configuration files. * Update configuration in database. * Setting up Cobbler.. Processing /etc/cobbler/modules.conf `/etc/cobbler/modules.conf' -> `/etc/cobbler/modules.conf-swsave' Processing /etc/cobbler/settings `/etc/cobbler/settings' -> `/etc/cobbler/settings-swsave' cobblerd does not appear to be running/accessible Cobbler requires tftp and xinetd services be turned on for PXE provisioning functionality. Enable these services [Y]? cobblerd does not appear to be running/accessible * Restarting services. Installation complete. Visit https://spacewalk.domain.com to create the Spacewalk administrator account.
The following channels on public-yum.oracle.com contain errata information that can be ingested by Spacewalk:
Each repository stores ALL packages released since the first Generally Available (GA) release of each version. This means the storage requirements for each of these repositories is between 20GB-30GB each. Care should be taken to ensure you have enough disk space to mirror each repository.
Adding the Oracle Linux 6 (x86_64) Latest channel
Goto Channels -> Manage Software Channels -> Manage Repositories. Click "create new repository" and provide the following configuration:
Then click "create repository".
After creating the repository, you need to link it to one or more Software Channels. Goto: Channels -> Manage Software Channels. Click "create new channel" and provide the following configuration:
We just published a new article on OTN: How I Used Cgroups to Manage System Resource in Oracle Linux 6 by Ginny Henningsen.
In this article, Ginny explains how to use the Linux kernel's built-in resource control mechanisms (called "Cgroups") to manage the allocation of CPUs and memory to processes and how to configure disk I/O throttling for certain groups of processes. Cgroups is a very powerful and flexible feature of the Linux kernel. We hope you will find this article useful!
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