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Fix #3955 Refine the stateless SN and add the content with localdisk
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Bin Xu
@@ -18,47 +18,57 @@ Build the Service Node Diskless Image
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This section assumes you can build the stateless image on the management node because the Service Nodes are the same OS and architecture as the management node. If this is not the case, you need to build the image on a machine that matches the Service Node's OS architecture.
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* Create an osimage definition. When you run ``copycds``, xCAT will create a Service Node osimage definitions for that distribution. For a stateless
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Service Node, use the ``*-netboot-service`` definition. ::
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* Create an osimage definition. When you run ``copycds``, xCAT will only create a Service Node stateful osimage definitions for that distribution. For a stateless Service Node, you may create it from a stateless Compute Node osimage definition. ::
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# lsdef -t osimage | grep -i service
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rhels6.4-ppc64-install-service (osimage)
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rhels6.4-ppc64-netboot-service (osimage) <================
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rhels6.4-ppc64-statelite-service (osimage)
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lsdef -t osimage | grep -i netboot
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rhels7.3-ppc64le-netboot-compute (osimage)
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# lsdef -t osimage -l rhels6.3-ppc64-netboot-service
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Object name: rhels6.3-ppc64-netboot-service
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exlist=/opt/xcat/share/xcat/netboot/rh/service.exlist
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mkdef -t osimage -o rhels7.3-ppc64le-netboot-service \
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--template rhels7.3-ppc64le-netboot-compute \
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profile=service provmethod=netboot postscripts=servicenode \
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exlist=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.exlist \
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otherpkglist=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.otherpkgs.pkglist \
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pkglist=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.pkglist \
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postinstall=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.postinstall \
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rootimgdir=/install/netboot/rhels7.3/ppc64le/service
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lsdef -t osimage -l rhels7.3-ppc64le-netboot-service
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Object name: rhels7.3-ppc64le-netboot-service
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exlist=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.exlist
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imagetype=linux
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osarch=ppc64
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osdistroname=rhels6.3-ppc64
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osarch=ppc64le
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osdistroname=rhels7.3-ppc64le
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osname=Linux
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osvers=rhels6.3
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otherpkgdir=/install/post/otherpkgs/rhels6.3/ppc64
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otherpkglist=/opt/xcat/share/xcat/netboot/rh/service.rhels6.ppc64.otherpkgs.pkglist
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pkgdir=/install/rhels6.3/ppc64
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pkglist=/opt/xcat/share/xcat/netboot/rh/service.rhels6.ppc64.pkglist
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postinstall=/opt/xcat/share/xcat/netboot/rh/service.rhels6.ppc64.postinstall
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osvers=rhels7.3
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otherpkgdir=/install/post/otherpkgs/rhels7.3/ppc64le
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otherpkglist=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.otherpkgs.pkglist
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pkgdir=/install/rhels7.3/ppc64le
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pkglist=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.pkglist
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postinstall=/opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.postinstall
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postscripts=servicenode
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profile=service
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provmethod=netboot
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rootimgdir=/install/netboot/rhels6.3/ppc64/service
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rootimgdir=/install/netboot/rhels7.3/ppc64le/service
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* You can check the Service Node packaging to see if it has all the rpms you require. We ship a basic requirements lists that will create a fully functional Service Node. However, you may want to customize your service node by adding additional operating system packages or modifying the files excluded by the exclude list. View the files referenced by the osimage pkglist, otherpkglist and exlist attributes: ::
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cd /opt/xcat/share/xcat/netboot/rh/
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view service.rhels6.ppc64.pkglist
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view service.rhels6.ppc64.otherpkgs.pkglist
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view service.exlist
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view service.rhels7.ppc64le.pkglist
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view service.rhels7.ppc64le.otherpkgs.pkglist
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view service.rhels7.ppc64le.exlist
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If you would like to change any of these files, copy them to a custom
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directory. This can be any directory you choose, but we recommend that you
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keep it /install somewhere. A good location is something like
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``/install/custom/netboot/<os>/service``. Make sure that your
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``/install/custom/netboot/<osimage>``. Make sure that your
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``otherpkgs.pkglist`` file as an entry for
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::
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xcat/xcat-core/xCATsn
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xcat/xcat-dep/rh7/ppc64le/conserver-xcat
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xcat/xcat-dep/rh7/ppc64le/perl-Net-Telnet
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xcat/xcat-dep/rh7/ppc64le/perl-Expect
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This is required to install the xCAT Service Node function into your image.
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@@ -68,30 +78,31 @@ This section assumes you can build the stateless image on the management node be
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::
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cp /opt/xcat/share/xcat/netboot/rh/service.rhels6.ppc64.postinstall
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/install/custom/netboot/rh
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vi /install/custom/netboot/rh
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# uncomment the sample fstab lines and change as needed:
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proc /proc proc rw 0 0
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sysfs /sys sysfs rw 0 0
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devpts /dev/pts devpts rw,gid=5,mode=620 0 0
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service_x86_64 / tmpfs rw 0 1
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none /tmp tmpfs defaults,size=10m 0 2
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none /var/tmp tmpfs defaults,size=10m 0 2
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cp /opt/xcat/share/xcat/netboot/rh/service.rhels7.ppc64le.postinstall \
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/install/custom/netboot/rhels7.3-ppc64le-netboot-service/my.postinstall
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vi /install/custom/netboot/rhels7.3-ppc64le-netboot-service/my.postinstall
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# uncomment the sample fstab lines and change as needed:
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proc /proc proc rw 0 0
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sysfs /sys sysfs rw 0 0
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devpts /dev/pts devpts rw,gid=5,mode=620 0 0
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service_ppc64le / tmpfs rw 0 1
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none /tmp tmpfs defaults,size=10m 0 2
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none /var/tmp tmpfs defaults,size=10m 0 2
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After modifying the files, you will need to update the osimage definition to
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reference these files. We recommend creating a new osimage definition for
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your custom image: ::
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lsdef -t osimage -l rhels6.3-ppc64-netboot-service -z > /tmp/myservice.def
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lsdef -t osimage -l rhels7.3-ppc64le-netboot-service -z > /tmp/myservice.def
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vi /tmp/myservice.def
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# change the name of the osimage definition
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# change any attributes that now need to reference your custom files
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# change the rootimgdir attribute replacing 'service'
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with a name to match your new osimage definition
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# change the name of the osimage definition
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# change any attributes that now need to reference your custom files
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# change the rootimgdir attribute replacing 'service' with a name to match your new osimage definition
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cat /tmp/msyservice.def | mkdef -z
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While you are here, if you'd like, you can do the same for your compute node
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While you are here, if you'd like, you can do the same for your Service Node
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images, creating custom files and new custom osimage definitions as you need
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to.
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@@ -100,10 +111,10 @@ This section assumes you can build the stateless image on the management node be
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* If you downloaded xCAT to your management node for installation, place a
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copy of your xcat-core and xcat-dep in your otherpkgdir directory ::
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lsdef -t osimage -o rhels6.3-ppc64-netboot-service -i otherpkgdir
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Object name: rhels6.3-ppc64-netboot-service
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otherpkgdir=/install/post/otherpkgs/rhels6.3/ppc64
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cd /install/post/otherpkgs/rhels6.3/ppc64
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lsdef -t osimage -o rhels7.3-ppc64le-netboot-service -i otherpkgdir
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Object name: rhels7.3-ppc64le-netboot-service
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otherpkgdir=/install/post/otherpkgs/rhels7.3/ppc64le
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cd /install/post/otherpkgs/rhels7.3/ppc64le
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mkdir xcat
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cd xcat
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cp -Rp <current location of xcat-core>/xcat-core
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@@ -117,11 +128,11 @@ This section assumes you can build the stateless image on the management node be
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::
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lsdef -t osimage -o rhels6.3-ppc64-netboot-service -i otherpkgdir
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Object name: rhels6.3-ppc64-netboot-service
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otherpkgdir=/install/post/otherpkgs/rhels6.3/ppc64
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cd /install/post/otherpkgs/rhels6.3/ppc64
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lsdef -t osimage -o rhels7.3-ppc64le-netboot-service -i otherpkgdir
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Object name: rhels7.3-ppc64le-netboot-service
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otherpkgdir=/install/post/otherpkgs/rhels7.3/ppc64le
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cd /install/post/otherpkgs/rhels7.3/ppc64le
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mkdir xcat
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cd xcat
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@@ -135,40 +146,110 @@ This section assumes you can build the stateless image on the management node be
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::
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genimage rhels6.3-ppc64-netboot-service
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genimage rhels7.3-ppc64le-netboot-service
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* Prevent DHCP from starting up until xcatd has had a chance to configure it:
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::
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chroot /install/netboot/rhels6.3/ppc64/service/rootimg chkconfig dhcpd off
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chroot /install/netboot/rhels6.3/ppc64/service/rootimg chkconfig dhcrelay off
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chroot /install/netboot/rhels7.3/ppc64le/service/rootimg chkconfig dhcpd off
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chroot /install/netboot/rhels7.3/ppc64le/service/rootimg chkconfig dhcrelay off
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* IF using NFS hybrid mode, export /install read-only in Service Node image:
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::
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cd /install/netboot/rhels6.3/ppc64/service/rootimg/etc
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cd /install/netboot/rhels7.3/ppc64le/service/rootimg/etc
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echo '/install *(ro,no_root_squash,sync,fsid=13)' >exports
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* Pack the image for your osimage definition:
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::
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packimage rhels6.3-ppc64-netboot-service
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packimage rhels7.3-ppc64le-netboot-service
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* Set the node status to ready for netboot using your osimage definition and
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your 'service' nodegroup:
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::
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nodeset service osimage=rhels6.3-ppc64-netboot-service
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nodeset service osimage=rhels7.3-ppc64le-netboot-service
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* To diskless boot the Service Nodes
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::
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rnetboot service
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rsetboot service
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Monitor install and boot
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------------------------
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::
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wcons service # make sure DISPLAY is set to your X server/VNC or
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rcons <one-node-at-a-time> # or do rcons for each node
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tail -f /var/log/messages
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Enable localdisk for stateless Service Node (Optional)
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------------------------------------------------------
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If you want, your can leverage local disk to contain some directories during the
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stateless nodes running. For Service Node, it is recommended to put below directories
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on local disk. ::
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#/install (Not required when using shared /install directory)
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#/tftpboot (Not required when using shared /tftpboot directory)
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/var/log
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/tmp
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The following section explains how to accomplish this.
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* Change the Service Node osimage definition to enable ``localdisk``
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::
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#create a partition file to partition and mount the disk
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export OSIMAGE=rhels7.3-ppc64le-netboot-service
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cat<<EOF > /install/custom/netboot/$OSIMAGE/partitionfile
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enable=yes
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enablepart=yes
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[disk]
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dev=/dev/sda
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clear=yes
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parts=10,50
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[localspace]
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dev=/dev/sda2
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fstype=ext4
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[swapspace]
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dev=/dev/sda1
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EOF
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#add the partition file to Service Node osimage definition and configure ``policy`` table
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chdef -t osimage -o $OSIMAGE partitionfile=/install/custom/netboot/$OSIMAGE/partitionfile
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chtab priority=7.1 policy.commands=getpartition policy.rule=allow
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#define files or directories which are required to be put on local disk
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#chtab litefile.image=$OSIMAGE litefile.file=/install/ litefile.options=localdisk
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#chtab litefile.image=$OSIMAGE litefile.file=/tftpboot/ litefile.options=localdisk
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chtab litefile.image=$OSIMAGE litefile.file=/var/log/ litefile.options=localdisk
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chtab litefile.image=$OSIMAGE litefile.file=/tmp/ litefile.options=localdisk
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* Run image generation and repacking for your osimage definition:
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::
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genimage rhels7.3-ppc64le-netboot-service
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packimage rhels7.3-ppc64le-netboot-service
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Note: ``enablepart=yes`` in partition file will make partition on the locak disk at every boot time. If you want to keep the contents
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on local disk at next boot, remmber changing to ``enablepart=no`` after the first time provisioning.
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For more information on ``localdisk`` option, refer to :ref:`setup_localdisk_label`
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Update Service Node Stateless Image
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@@ -182,10 +263,10 @@ To update the xCAT software in the image at a later time:
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::
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genimage rhels6.3-ppc64-netboot-service
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packimage rhels6.3-ppc64-netboot-service
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nodeset service osimage=rhels6.3-ppc64-netboot-service
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rnetboot service
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genimage rhels7.3-ppc64le-netboot-service
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packimage rhels7.3-ppc64le-netboot-service
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nodeset service osimage=rhels7.3-ppc64le-netboot-service
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rsetboot service
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Note: The Service Nodes are set up as NFS-root servers for the compute nodes.
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Any time changes are made to any compute image on the mgmt node it will be
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@@ -193,12 +274,3 @@ necessary to sync all changes to all Service Nodes. In our case the
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``/install`` directory is mounted on the servicenodes, so the update to the
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compute node image is automatically available.
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Monitor install and boot
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------------------------
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::
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wcons service # make sure DISPLAY is set to your X server/VNC or
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rcons <one-node-at-a-time> # or do rcons for each node
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tail -f /var/log/messages
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@@ -1,3 +1,5 @@
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.. _setup_localdisk_label:
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Enabling the localdisk Option
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-----------------------------
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@@ -1 +1,4 @@
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.. include:: ../../../common/deployment/enable_localdisk.rst
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``Note``:
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* To keep the contents on local disk after you using ``enablepart=yes`` to do the disk partitioning, make sure to set ``enablepart=no`` in partition configuration file after the node is booted.
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@@ -1,4 +0,0 @@
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.. include:: ../../../common/deployment/enable_localdisk.rst
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``Note``:
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* To keep the contents on local disk after you using ``enablepart=yes`` to do the disk partitioning, make sure to set ``enablepart=no`` in partition configuration file after the node is booted.
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