minimal gnt setup notes

tsa/howto/ganeti.mdwn

+# Ganeti setup
+
+## Prepare
+
+- Make sure all nodes have the same LVM setup and the same network setup.  They want openvswitch.  Cf. host `fsn-node-01`'s /etc/network/interfaces.
+
+- Prepare all the nodes by configuring them in puppet.  They should be in the class `roles::ganeti::fsn` if they
+  are part of the fsn cluster.  If you make a new cluster, make a new role and add nodes.
+
+## New master
+
+To create the fsn master, we added fsngnt to DNS, then ran
+
+    gnt-cluster init \
+      --master-netdev vlan-gntbe \
+      --vg-name vg_ganeti \
+      --secondary-ip 172.30.135.1 \
+      --enabled-hypervisors kvm \
+      --nic-parameters link=br0,vlan=4000 \
+      --mac-prefix 00:66:37 \
+      --no-ssh-init \
+      --no-etc-hosts \
+      fsngnt.torproject.org
+
+## Add a new node
+
+We did run the following on fsn-node-01:
+
+    gnt-node add \
+      --secondary-ip 172.30.135.2 \
+      --no-ssh-key-check \
+      --no-node-setup \
+      fsn-node-02.torproject.org
+