X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=input%2Fhowto%2Finstall-ganeti.creole;h=bd7d85ca478b77d708b8d63368fb4c82ad0eb4be;hb=4050b37a44d53e672e347f8525d634d6280884b2;hp=a28f5b4c844b8eaa3e0a2228b76bd45ed0640978;hpb=1b67953c3e1dc8a4e9a351f0a52e647159212d03;p=mirror%2Fdsa-wiki.git

diff --git a/input/howto/install-ganeti.creole b/input/howto/install-ganeti.creole
index a28f5b4..bd7d85c 100644
--- a/input/howto/install-ganeti.creole
+++ b/input/howto/install-ganeti.creole
@@ -36,8 +36,9 @@ The following DNS records exist:
 On each node, install the required packages:
 
 {{{
-    apt-get install fai-client ssed extlinux
-    apt-get install -t squeeze-backports drbd8-utils ganeti2 ganeti-instance-debootstrap ganeti-htools
+    # maybe: apt-get install drbd8-utils
+    # maybe: apt-get install ganeti-instance-debootstrap
+    apt-get install ganeti2 ganeti-htools qemu-kvm
 }}}
 
 === configure kernel modules ===
@@ -48,6 +49,8 @@ On each node, ensure that the required kernel modules are loaded at boot:
     ainsl /etc/modules 'drbd minor_count=255 usermode_helper=/bin/true'
     ainsl /etc/modules 'hmac'
     ainsl /etc/modules 'tun'
+    ainsl /etc/modules 'ext3'
+    ainsl /etc/modules 'ext4'
 }}}
 
 === configure networking ===
@@ -63,9 +66,9 @@ should be configured rather than eth1.
 To prevent the link address changing due to startup/shutdown of virtual
 machines, explicitly set the value.
 
-{{{
-    # /etc/networking/interfaces for foo.debian.org
+This is the interfaces file for foo.debian.org:
 
+{{{
     auto br0
     iface br0 inet static
       bridge_ports eth0
@@ -82,9 +85,9 @@ machines, explicitly set the value.
       netmask 255.255.255.0
 }}}
 
-{{{
-    # /etc/networking/interfaces for bar.debian.org
+This is the interfaces file for bar.debian.org:
 
+{{{
     auto br0
     iface br0 inet static
       bridge_ports eth0
@@ -123,17 +126,6 @@ On each node, create a volume group:
     vgcreate vg_ganeti /dev/cciss/c0d0p3
 }}}
 
-=== create kvmU symbolic links ===
-
-On each node, create vmlinuz and initrd symlinks as expected by the kvm
-hypervisor (not strictly required if all guests will boot from their own
-kernels):
-
-{{{
-    ln -s -T /boot/vmlinuz-2.6.32-5-amd64 /boot/vmlinuz-2.6-kvmU
-    ln -s -T /boot/initrd.img-2.6.32-5-amd64 /boot/initrd.img-2.6-kvmU
-}}}
-
 === exchange ssh keys ===
 
 on each node:
@@ -145,7 +137,7 @@ on each node:
 
 === configure iptables (via ferm) ===
 
-ipsum loren bacon puppet: the nodes must connect to each other over the private network for drbd purposes; puppet can handle this (poorly; needs improvement)
+the nodes must connect to each other over the public and private networks for a number of reasons; see the ganeti2 module in puppet
 
 === instantiate the cluster ===
 
@@ -161,7 +153,7 @@ On the master node (foo) only:
       --mac-prefix 00:16:37 \
       --no-ssh-init \
       --no-etc-hosts \
-      --hypervisor-parameters kvm:initrd_path=/boot/initrd.img-2.6-kvmU,kernel_path=/boot/vmlinuz-2.6-kvmU \
+      --hypervisor-parameters kvm:initrd_path=,kernel_path= \
       foobar.debian.org
 }}}
 
@@ -177,9 +169,9 @@ Note the following:
 
 For each slave node (only bar for this example):
 
-on the slave, append the master's /etc/ssh/ssh_host_rsa_key to
+on the slave, append the master's /etc/ssh/ssh_host_rsa_key.pub to
 /etc/ssh/userkeys/root.  This is only required temporarily - once
-everything works puppet will put it/keep it there.
+everything works, puppet will put it/keep it there.
 
 on the master node (foo):
 
@@ -207,11 +199,7 @@ If everything has been configured correctly, no errors should be reported.
 
 === create the 'dsa' variant ===
 
-ipsum loren bacon deboostrap+dsa
-
-* create /etc/ganeti/instance-debootstrap/variants/dsa.conf
-* add 'dsa' to /etc/ganeti/instance-debootstrap/variants.list
-* obtain ??-dsa-* from tristano:/etc/ganeti/instance-debootstrap/hooks
+Ensure that the debootstrap+dsa variant has been installed by puppet (see ganeti2 module in dsa-puppet).
 
 ----
 
@@ -242,7 +230,8 @@ Note the following:
 
 * the primary and secondary nodes have been explicitly set
 * the operating system type is 'debootstrap+dsa'
-* the network interfarce 0 (eth1 on the system) is set to the instance's interface on the public network
+* the network interfarce 0 (eth0 on the system) is set to the instance's interface on the public network
+* If qux.d.o does not yet exist in DNS/LDAP, you may need --no-ip-check --no-name-check.  Be careful that the hostname and IP address are not taken already!
 
 ----
 
@@ -252,11 +241,11 @@ If the instances require access to the private network, then there are two modif
 
 === re-configure networking ===
 
-Ensure that br1 is configured (rather than eth1).
+On the nodes, ensure that br1 is configured (rather than eth1).
 
-{{{
-    # /etc/networking/interfaces for foo.debian.org
+This is the interfaces file for foo.debian.org:
 
+{{{
     auto br0
     iface br0 inet static
       bridge_ports eth0
@@ -277,9 +266,32 @@ Ensure that br1 is configured (rather than eth1).
       up ip link set addr $(cat /sys/class/net/$IFACE/address) dev $IFACE
 }}}
 
+This is the interfaces file for bar.debian.org:
+
+{{{
+    auto br0
+    iface br0 inet static
+      bridge_ports eth0
+      bridge_maxwait 0
+      bridge_fd 0
+      address A.B.C.3
+      netmask 255.255.255.0
+      gateway A.B.C.254
+      up ip link set addr $(cat /sys/class/net/$IFACE/address) dev $IFACE
+
+    auto br1
+    iface br1 inet static
+      bridge_ports eth1
+      bridge_maxwait 0
+      bridge_fd 0
+      address E.F.G.3
+      netmask 255.255.255.0
+      up ip link set addr $(cat /sys/class/net/$IFACE/address) dev $IFACE
+}}}
+
 === create or update the instance  ===
 
-When creating the instance, indicate both netwokrs:
+When creating the instance, indicate both networks:
 
 {{{
     gnt-instance add \
@@ -288,20 +300,19 @@ When creating the instance, indicate both netwokrs:
       --os-size 4GiB \
       --os-type debootstrap+dsa \
       --hypervisor-parameters kvm:initrd_path=,kernel_path= \
-      --net 0:ip=A.B.C.4,1:ip=E.F.G.4 \
+      --net 0:ip=A.B.C.4 \
+      --net 1:link=br1,ip=E.F.G.4 \
       qux.debian.org
 }}}
 
-Please note that the dsa bootscript will only configure eth1 (nic0).  If
-specifying a second internface, the guest operating system must be updated
-manually.
+* If qux.d.o does not yet exist in DNS/LDAP, you may need --no-ip-check --no-name-check.  Be careful that the hostname and IP address are not taken already!
 
 When updating an existing instance, add the interface:
 
 {{{
     gnt-instance shutdown qux.debian.org
     gnt-instance modify \
-      --net add:ip=E.F.G.4 \
+      --net add:link=br1,ip=E.F.G.4 \
       qux.debian.org
     gnt-instance startup qux.debian.org
 }}}
@@ -310,3 +321,58 @@ Please note that the hook scripts are run only at instance instantiation.  When
 adding interfaces to an instance, the guest opearting system must be updated
 manually.
 
+
+* If you are importing an instance from libvirt with LVM setup, you can adopt LVs:
+
+{{{
+    gnt-instance add -t plain --os-type debootstrap+dsa-wheezy \
+      --disk 0:adopt=lully-boot \
+      --disk 1:adopt=lully-root \
+      --disk 2:adopt=lully-swap \
+      --disk 3:adopt=lully-log  \
+      --hypervisor-parameters kvm:initrd_path=,kernel_path= \
+      --net 0:ip=82.195.75.99 -n clementi.debian.org  lully.debian.org
+}}}
+
+And you want to convert it to use DRBD afterwards and start it on the other cluster node, so we can ensure that DRBD is correctly working.
+{{{
+    gnt-instance shutdown lully.debian.org
+    gnt-instance modify -t drbd -n czerny.debian.org lully.debian.org
+    gnt-instance failover lully.debian.org
+    gnt-instance startup lully.debian.org
+}}}
+
+* Some instances NEED ide instead of virtio
+
+{{{
+    gnt-instance modify --hypervisor-parameters disk_type=ide fils.debian.org
+}}}
+
+* To import instances with SAN volumes
+
+{{{
+    gnt-instance add -t blockdev --os-type debootstrap+dsa \
+      --disk 0:adopt=/dev/disk/by-id/scsi-reger-boot \
+      --disk 1:adopt=/dev/disk/by-id/scsi-reger-root \
+      --hypervisor-parameters kvm:initrd_path=,kernel_path= \
+      --net 0:ip=206.12.19.124 -n rossini.debian.org reger.debian.org
+}}}
+
+* How to add new LUNs to Bytemark Cluster
+
+{{{
+  + Add a new LUN in the MSA and export it to all blades
+
+  then:
+  gnt-cluster command "echo 1 > /sys/bus/pci/devices/0000:0e:00.0/cciss0/rescan"
+  
+  then:
+  reload multipath-tools on gnt-master (normaly bm-bl1):
+  service multipath-tools reload
+  add the WWNs to dsa-puppet/modules/multipath/files/bm-multipath.conf and define the alias and commit that file to git.
+
+  then:
+  gnt-cluster command "puppet agent -t"
+
+  This will update the multipath config on all cluster nodes. WITHOUT doing this, you can't migrate VMs between nodes.
+}}}