Eliminate the need for a deep copy of database objects during the

[invirt/scripts/prod-migration.git] / xvm-migrate-machine

diff --git a/xvm-migrate-machine b/xvm-migrate-machine
index d8c729e..a58415a 100644 (file)
--- a/xvm-migrate-machine
+++ b/xvm-migrate-machine
@@ -1,19 +1,42 @@
-##!/bin/bash
+#!/bin/python
 # Migrates the machine named $1 from the dev cluster.
 # To be run on the prod cluster.
 
 ## The present version is NOT A REAL SCRIPT.
 ## Things may not even be tested.  Copy and paste.
+not_ready_yet_do_not_run_me
 
-## dump from dev db; save info well
 
-#echo "\\a \\t \\\\ select * from machines where name = '$MACHINE';" \
-# | psql -h xvm -U sipb-xen sipb_xen -q
-## 581|fsck|256|price|price|2ab6638f-3f65-2b32-3fd3-c16b74a9b7fe|linux|f|1|price|test|f
-## watch out for funny characters in description; better (non-)quoting needed
-## also disks, nics
+from lib import database
+
+dev_db_uri = 'postgres://sipb-xen@sipb-xen-dev.mit.edu/sipb_xen'
+database.connect(dev_db_uri)
+dev_sess = database.session
 
-## remove from dev db; ideally atomic with dump
+database.connect()
+prod_sess = database.session
+
+def take_data(machine_name):
+## dump from dev db; save info well
+  dev_sess.begin()
+  machine = dev_sess.query(database.Machine).filter_by(name=machine_name).one()
+  
+  # Clean out the ACL just so we don't have to think about it
+  machine.acl = []
+  dev_sess.update(machine)
+  
+  disks = machine.disks
+  nics = machine.nics
+  for r in disks + nics + [machine]:
+    database.session.delete(r)
+  
+  database.session.commit()
+  
+  for r in disks + nics + [machine]:
+    dev_sess.expunge(i)
+    del i._instance_key
+  
+  return machine
 
 ## shut down if up
 #remctl remote control $MACHINE destroy
@@ -26,5 +49,15 @@ ssh t-i dd if=/dev/xenvg/"$lvname" of=/dev/stdout bs=1M \
  | dd if=/dev/stdin of=/dev/xenvg/"$lvname" bs=1M
 
 ## add to dev db
+def restore_data(machine):
+  machine.type = prod_sess.query(database.Type).filter_by(type_id=machine.type.type_id).one()
+  prod_sess.begin()
+  ## now copy machine, disks, nics to new ORM objects (yuck, oh well)
+  ## and database.session.save(those)
+  prod_sess.save(machine)
+  prod_sess.commit()
+
 
 ## power on if desired
+
+