= Installation = == OS Installation == Detailed instructions for installing Fedora are available at http://docs.fedoraproject.org/install-guide/f13/ in a number of languages. The abbreviated version is as follows... Point your browser to http://fedoraproject.org/en/get-fedora-all, locate the Install Media section and download the install DVD that matches your hardware. Burn the disk image to a DVD footnote:[http://docs.fedoraproject.org/readme-burning-isos/en-US.html] and boot from it. Or use the image to boot a virtual machine as I have done here. After clicking through the welcome screen, select your language and keyboard layout footnote:[http://docs.fedoraproject.org/install-guide/f13/en-US/html/s1-langselection-x86.html] .Installation: Good choice image::images/f-13.1-welcome.png["Welcome",align="center"] .Fedora Installation - Storage Devices image::images/f-13.2-devices.png["Storage Devices",align="center"] Assign your machine a host name. footnote:[http://docs.fedoraproject.org/install-guide/f13/en-US/html/sn-networkconfig-fedora.html] I happen to control the clusterlabs.org domain name, so I will use that here. .Fedora Installation - Hostname image::images/f-13.3-hostname.png["Hostname",align="center"] You will then be prompted to indicate the machine's physical location and to supply a root password. footnote:[http://docs.fedoraproject.org/install-guide/f13/en-US/html/sn-account_configuration.html] Now select where you want Fedora installed. footnote:[http://docs.fedoraproject.org/install-guide/f13/en-US/html/s1-diskpartsetup-x86.html] As I don’t care about any existing data, I will accept the default and allow Fedora to use the complete drive. However I want to reserve some space for DRBD, so I'll check the Review and modify partitioning layout box. .Fedora Installation - Installation Type image::images/f-13.4-partition-overview.png["Choose Install Type",align="center"] By default, Fedora will give all the space to the / (aka. root) partition. Wel'll take some back so we can use DRBD. .Fedora Installation - Default Partitioning image::images/f-13.5-partition-default.png["Default Partitioning",align="center"] The finalized partition layout should look something like the diagram below. [IMPORTANT] =========== If you plan on following the DRBD or GFS2 portions of this guide, you should reserve at least 1Gb of space on each machine from which to create a shared volume. Fedora Installation - Customize PartitioningFedora Installation: Create a partition to use (later) for website data =========== .Fedora Installation - Customize Partitioning image::images/f-13.6-partition-custom.png["Customize Partitioning",align="center"] .Fedora Installation - Bootloader image::images/f-13.7-bootloader.png["Unless you have a strong reason not to, accept the default bootloader location",align="center"] Next choose which software should be installed. Change the selection to Web Server since we plan on using Apache. Don't enable updates yet, we'll do that (and install any extra software we need) later. After you click next, Fedora will begin installing. .Fedora Installation - Software image::images/f-13.8-software.png["Software selection",align="center"] Go grab something to drink, this may take a while .Fedora Installation - Installing image::images/f-13.9-installing.png["Installing",align="center"] .Fedora Installation - Installation Complete image::images/f-13.10-install-complete.png["Stage 1, completed",align="center"] Once the node reboots, follow the on screen instructions footnote:[http://docs.fedoraproject.org/install-guide/f13/en-US/html/ch-firstboot.html] to create a system user and configure the time. .Fedora Installation - First Boot image::images/f-13.11-post-welcome.png["First boot",align="center"] .Fedora Installation - Create Non-privileged User image::images/f-13.12-new-user.png["Creating a new user, take note of the password, you'll need it soon",align="center"] [NOTE] ======= It is highly recommended to enable NTP on your cluster nodes. Doing so ensures all nodes agree on the current time and makes reading log files significantly easier. Fedora Installation - Date and TimeFedora Installation: Enable NTP to keep the times on all your nodes consistent ======= .Fedora Installation - Date and Time image::images/f-13.13-date-time.png["Date and time",align="center"] Click through the next screens until you reach the login window. Click on the user you created and supply the password you indicated earlier. .Fedora Installation - Customize Networking image::images/f-13.14-networking.png["Click here to configure networking",align="center"] [IMPORTANT] =========== Do not accept the default network settings. Cluster machines should never obtain an ip address via DHCP. Here I will use the internal addresses for the clusterlab.org network. =========== .Fedora Installation - Specify Network Preferences image::images/f-13.15-manual-networking.png["Specify network settings for your machine, never choose DHCP",align="center"] .Fedora Installation - Activate Networking image::images/f-13.16-networking-activate.png["Click the big green button to activate your changes",align="center"] .Fedora Installation - Bring up the Terminal image::images/f-13.17-terminal.png["Down to business, fire up the command line",align="center"] [NOTE] ====== That was the last screenshot, from here on in we’re going to be working from the terminal. ====== == Cluster Software Installation == Go to the terminal window you just opened and switch to the super user (aka. "root") account with the su command. You will need to supply the password you entered earlier during the installation process. [source,Bash] ---- [beekhof@pcmk-1 ~]$ su - Password: [root@pcmk-1 ~]# ---- [NOTE] ====== Note that the username (the text before the @ symbol) now indicates we’re running as the super user “root”. ====== [source,Bash] .... # ip addr 1: lo: mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 link/ether 00:0c:29:6f:e1:58 brd ff:ff:ff:ff:ff:ff inet 192.168.9.41/24 brd 192.168.9.255 scope global eth0 inet6 ::20c:29ff:fe6f:e158/64 scope global dynamic valid_lft 2591667sec preferred_lft 604467sec inet6 2002:57ae:43fc:0:20c:29ff:fe6f:e158/64 scope global dynamic valid_lft 2591990sec preferred_lft 604790sec inet6 fe80::20c:29ff:fe6f:e158/64 scope link valid_lft forever preferred_lft forever # ping -c 1 www.google.com PING www.l.google.com (74.125.39.99) 56(84) bytes of data. 64 bytes from fx-in-f99.1e100.net (74.125.39.99): icmp_seq=1 ttl=56 time=16.7 ms --- www.l.google.com ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 20ms rtt min/avg/max/mdev = 16.713/16.713/16.713/0.000 ms # /sbin/chkconfig network on # .... === Security Shortcuts === To simplify this guide and focus on the aspects directly connected to clustering, we will now disable the machine’s firewall and SELinux installation. Both of these actions create significant security issues and should not be performed on machines that will be exposed to the outside world. [IMPORTANT] =========== TODO: Create an Appendix that deals with (at least) re-enabling the firewall. =========== [source,Bash] ---- # sed -i.bak "s/SELINUX=enforcing/SELINUX=permissive/g" /etc/selinux/config # /sbin/chkconfig --del iptables # service iptables stop iptables: Flushing firewall rules: [ OK ] iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Unloading modules: [ OK ] ---- [NOTE] ================ You will need to reboot for the SELinux changes to take effect. Otherwise you will see something like this when you start corosync: May 4 19:30:54 pcmk-1 setroubleshoot: SELinux is preventing /usr/sbin/corosync "getattr" access on /. For complete SELinux messages. run sealert -l 6e0d4384-638e-4d55-9aaf-7dac011f29c1 May 4 19:30:54 pcmk-1 setroubleshoot: SELinux is preventing /usr/sbin/corosync "getattr" access on /. For complete SELinux messages. run sealert -l 6e0d4384-638e-4d55-9aaf-7dac011f29c1 ================ === Install the Cluster Software === Since version 12, Fedora comes with recent versions of everything you need, so simply fire up the shell and run: .... # sed -i.bak "s/enabled=0/enabled=1/g" /etc/yum.repos.d/fedora.repo # sed -i.bak "s/enabled=0/enabled=1/g" /etc/yum.repos.d/fedora-updates.repo # yum install -y pacemaker corosyncLoaded plugins: presto, refresh-packagekit fedora/metalink | 22 kB 00:00 fedora-debuginfo/metalink | 16 kB 00:00 fedora-debuginfo | 3.2 kB 00:00 fedora-debuginfo/primary_db | 1.4 MB 00:04 fedora-source/metalink | 22 kB 00:00 fedora-source | 3.2 kB 00:00 fedora-source/primary_db | 3.0 MB 00:05 updates/metalink | 26 kB 00:00 updates | 2.6 kB 00:00 updates/primary_db | 1.1 kB 00:00 updates-debuginfo/metalink | 18 kB 00:00 updates-debuginfo | 2.6 kB 00:00 updates-debuginfo/primary_db | 1.1 kB 00:00 updates-source/metalink | 25 kB 00:00 updates-source | 2.6 kB 00:00 updates-source/primary_db | 1.1 kB 00:00 Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package corosync.x86_64 0:1.2.1-1.fc13 set to be updated --> Processing Dependency: corosynclib = 1.2.1-1.fc13 for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libquorum.so.4(COROSYNC_QUORUM_1.0)(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libvotequorum.so.4(COROSYNC_VOTEQUORUM_1.0)(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libcpg.so.4(COROSYNC_CPG_1.0)(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libconfdb.so.4(COROSYNC_CONFDB_1.0)(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libcfg.so.4(COROSYNC_CFG_0.82)(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libpload.so.4(COROSYNC_PLOAD_1.0)(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: liblogsys.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libconfdb.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libcoroipcc.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libcpg.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libquorum.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libcoroipcs.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libvotequorum.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libcfg.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libtotem_pg.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 --> Processing Dependency: libpload.so.4()(64bit) for package: corosync-1.2.1-1.fc13.x86_64 ---> Package pacemaker.x86_64 0:1.1.5-1.fc13 set to be updated --> Processing Dependency: heartbeat >= 3.0.0 for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: net-snmp >= 5.4 for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: resource-agents for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: cluster-glue for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libnetsnmp.so.20()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libcrmcluster.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libpengine.so.3()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libnetsnmpagent.so.20()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libesmtp.so.5()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libstonithd.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libhbclient.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libpils.so.2()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libpe_status.so.2()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libnetsnmpmibs.so.20()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libnetsnmphelpers.so.20()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libcib.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libccmclient.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libstonith.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: liblrm.so.2()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libtransitioner.so.1()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libpe_rules.so.2()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libcrmcommon.so.2()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Processing Dependency: libplumb.so.2()(64bit) for package: pacemaker-1.1.5-1.fc13.x86_64 --> Running transaction check ---> Package cluster-glue.x86_64 0:1.0.2-1.fc13 set to be updated --> Processing Dependency: perl-TimeDate for package: cluster-glue-1.0.2-1.fc13.x86_64 --> Processing Dependency: libOpenIPMIutils.so.0()(64bit) for package: cluster-glue-1.0.2-1.fc13.x86_64 --> Processing Dependency: libOpenIPMIposix.so.0()(64bit) for package: cluster-glue-1.0.2-1.fc13.x86_64 --> Processing Dependency: libopenhpi.so.2()(64bit) for package: cluster-glue-1.0.2-1.fc13.x86_64 --> Processing Dependency: libOpenIPMI.so.0()(64bit) for package: cluster-glue-1.0.2-1.fc13.x86_64 ---> Package cluster-glue-libs.x86_64 0:1.0.2-1.fc13 set to be updated ---> Package corosynclib.x86_64 0:1.2.1-1.fc13 set to be updated --> Processing Dependency: librdmacm.so.1(RDMACM_1.0)(64bit) for package: corosynclib-1.2.1-1.fc13.x86_64 --> Processing Dependency: libibverbs.so.1(IBVERBS_1.0)(64bit) for package: corosynclib-1.2.1-1.fc13.x86_64 --> Processing Dependency: libibverbs.so.1(IBVERBS_1.1)(64bit) for package: corosynclib-1.2.1-1.fc13.x86_64 --> Processing Dependency: libibverbs.so.1()(64bit) for package: corosynclib-1.2.1-1.fc13.x86_64 --> Processing Dependency: librdmacm.so.1()(64bit) for package: corosynclib-1.2.1-1.fc13.x86_64 ---> Package heartbeat.x86_64 0:3.0.0-0.7.0daab7da36a8.hg.fc13 set to be updated --> Processing Dependency: PyXML for package: heartbeat-3.0.0-0.7.0daab7da36a8.hg.fc13.x86_64 ---> Package heartbeat-libs.x86_64 0:3.0.0-0.7.0daab7da36a8.hg.fc13 set to be updated ---> Package libesmtp.x86_64 0:1.0.4-12.fc12 set to be updated ---> Package net-snmp.x86_64 1:5.5-12.fc13 set to be updated --> Processing Dependency: libsensors.so.4()(64bit) for package: 1:net-snmp-5.5-12.fc13.x86_64 ---> Package net-snmp-libs.x86_64 1:5.5-12.fc13 set to be updated ---> Package pacemaker-libs.x86_64 0:1.1.5-1.fc13 set to be updated ---> Package resource-agents.x86_64 0:3.0.10-1.fc13 set to be updated --> Processing Dependency: libnet.so.1()(64bit) for package: resource-agents-3.0.10-1.fc13.x86_64 --> Running transaction check ---> Package OpenIPMI-libs.x86_64 0:2.0.16-8.fc13 set to be updated ---> Package PyXML.x86_64 0:0.8.4-17.fc13 set to be updated ---> Package libibverbs.x86_64 0:1.1.3-4.fc13 set to be updated --> Processing Dependency: libibverbs-driver for package: libibverbs-1.1.3-4.fc13.x86_64 ---> Package libnet.x86_64 0:1.1.4-3.fc12 set to be updated ---> Package librdmacm.x86_64 0:1.0.10-2.fc13 set to be updated ---> Package lm_sensors-libs.x86_64 0:3.1.2-2.fc13 set to be updated ---> Package openhpi-libs.x86_64 0:2.14.1-3.fc13 set to be updated ---> Package perl-TimeDate.noarch 1:1.20-1.fc13 set to be updated --> Running transaction check ---> Package libmlx4.x86_64 0:1.0.1-5.fc13 set to be updated --> Finished Dependency Resolution Dependencies Resolved ========================================================================================== Package Arch Version Repository Size ========================================================================================== Installing: corosync x86_64 1.2.1-1.fc13 fedora 136 k pacemaker x86_64 1.1.5-1.fc13 fedora 543 k Installing for dependencies: OpenIPMI-libs x86_64 2.0.16-8.fc13 fedora 474 k PyXML x86_64 0.8.4-17.fc13 fedora 906 k cluster-glue x86_64 1.0.2-1.fc13 fedora 230 k cluster-glue-libs x86_64 1.0.2-1.fc13 fedora 116 k corosynclib x86_64 1.2.1-1.fc13 fedora 145 k heartbeat x86_64 3.0.0-0.7.0daab7da36a8.hg.fc13 updates 172 k heartbeat-libs x86_64 3.0.0-0.7.0daab7da36a8.hg.fc13 updates 265 k libesmtp x86_64 1.0.4-12.fc12 fedora 54 k libibverbs x86_64 1.1.3-4.fc13 fedora 42 k libmlx4 x86_64 1.0.1-5.fc13 fedora 27 k libnet x86_64 1.1.4-3.fc12 fedora 49 k librdmacm x86_64 1.0.10-2.fc13 fedora 22 k lm_sensors-libs x86_64 3.1.2-2.fc13 fedora 37 k net-snmp x86_64 1:5.5-12.fc13 fedora 295 k net-snmp-libs x86_64 1:5.5-12.fc13 fedora 1.5 M openhpi-libs x86_64 2.14.1-3.fc13 fedora 135 k pacemaker-libs x86_64 1.1.5-1.fc13 fedora 264 k perl-TimeDate noarch 1:1.20-1.fc13 fedora 42 k resource-agents x86_64 3.0.10-1.fc13 fedora 357 k Transaction Summary ========================================================================================= Install 21 Package(s) Upgrade 0 Package(s) Total download size: 5.7 M Installed size: 20 M Downloading Packages: Setting up and reading Presto delta metadata updates-testing/prestodelta | 164 kB 00:00 fedora/prestodelta | 150 B 00:00 Processing delta metadata Package(s) data still to download: 5.7 M (1/21): OpenIPMI-libs-2.0.16-8.fc13.x86_64.rpm | 474 kB 00:00 (2/21): PyXML-0.8.4-17.fc13.x86_64.rpm | 906 kB 00:01 (3/21): cluster-glue-1.0.2-1.fc13.x86_64.rpm | 230 kB 00:00 (4/21): cluster-glue-libs-1.0.2-1.fc13.x86_64.rpm | 116 kB 00:00 (5/21): corosync-1.2.1-1.fc13.x86_64.rpm | 136 kB 00:00 (6/21): corosynclib-1.2.1-1.fc13.x86_64.rpm | 145 kB 00:00 (7/21): heartbeat-3.0.0-0.7.0daab7da36a8.hg.fc13.x86_64.rpm | 172 kB 00:00 (8/21): heartbeat-libs-3.0.0-0.7.0daab7da36a8.hg.fc13.x86_64.rpm | 265 kB 00:00 (9/21): libesmtp-1.0.4-12.fc12.x86_64.rpm | 54 kB 00:00 (10/21): libibverbs-1.1.3-4.fc13.x86_64.rpm | 42 kB 00:00 (11/21): libmlx4-1.0.1-5.fc13.x86_64.rpm | 27 kB 00:00 (12/21): libnet-1.1.4-3.fc12.x86_64.rpm | 49 kB 00:00 (13/21): librdmacm-1.0.10-2.fc13.x86_64.rpm | 22 kB 00:00 (14/21): lm_sensors-libs-3.1.2-2.fc13.x86_64.rpm | 37 kB 00:00 (15/21): net-snmp-5.5-12.fc13.x86_64.rpm | 295 kB 00:00 (16/21): net-snmp-libs-5.5-12.fc13.x86_64.rpm | 1.5 MB 00:01 (17/21): openhpi-libs-2.14.1-3.fc13.x86_64.rpm | 135 kB 00:00 (18/21): pacemaker-1.1.5-1.fc13.x86_64.rpm | 543 kB 00:00 (19/21): pacemaker-libs-1.1.5-1.fc13.x86_64.rpm | 264 kB 00:00 (20/21): perl-TimeDate-1.20-1.fc13.noarch.rpm | 42 kB 00:00 (21/21): resource-agents-3.0.10-1.fc13.x86_64.rpm | 357 kB 00:00 Total 539 kB/s | 5.7 MB 00:10 warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID e8e40fde: NOKEY fedora/gpgkey | 3.2 kB 00:00 ... Importing GPG key 0xE8E40FDE "Fedora (13) >/etc/corosync/service.d/pcmkservice { # Load the Pacemaker Cluster Resource Manager name: pacemaker ver: 1 } END ---- The final configuration should look something like the sample in Appendix B, Sample Corosync Configuration. [IMPORTANT] =========== When run in version 1 mode, the plugin does not start the Pacemaker daemons. Instead it just sets up the quorum and messaging interfaces needed by the rest of the stack. Starting the dameons occurs when the Pacemaker init script is invoked. This resolves two long standing issues: .. Forking inside a multi-threaded process like Corosync causes all sorts of pain. This has been problematic for Pacemaker as it needs a number of daemons to be spawned. .. Corosync was never designed for staggered shutdown - something previously needed in order to prevent the cluster from leaving before Pacemaker could stop all active resources. =========== === Propagate the Configuration === Now we need to copy the changes so far to the other node: [source,Bash] ---- # for f in /etc/corosync/corosync.conf /etc/corosync/service.d/pcmk /etc/hosts; do scp $f pcmk-2:$f ; done corosync.conf 100% 1528 1.5KB/s 00:00 hosts 100% 281 0.3KB/s 00:00 # ----