more detail on migration: moving db entries

svn path=/trunk/scripts/; revision=1437

diff --git a/xvm-migrate-machine b/xvm-migrate-machine
index d8c729e..f14c1b2 100644 (file)
--- a/xvm-migrate-machine
+++ b/xvm-migrate-machine
@@ -1,19 +1,30 @@
-##!/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.
 # 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 invirt import database
+
+dev_db_uri = 'postgres://sipb-xen@sipb-xen-dev.mit.edu/sipb_xen'

 
 

+
+def take_data(machine_name):
+## dump from dev db; save info well
+  database.connect(dev_db_uri)
+  database.session.begin()
+  machine = database.Machine.query().get_by(name=machine_name)
+  disks = database.Disk.query().filter_by(machine=machine).all()
+  nics = database.NIC.query().filter_by(machine=machine).all()

 ## remove from dev db; ideally atomic with dump
 ## remove from dev db; ideally atomic with dump

+  for r in disks + nics + [machine]:
+    database.session.delete(r)
+  database.session.commit()
+  return machine, disks, nics
+

 
 ## shut down if up
 #remctl remote control $MACHINE destroy
 
 ## shut down if up
 #remctl remote control $MACHINE destroy

@@ -26,5 +37,14 @@ 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
  | dd if=/dev/stdin of=/dev/xenvg/"$lvname" bs=1M
 
 ## add to dev db

+def restore_data(machine, disks, nics):
+  database.connect() # to prod DB
+  database.session.begin()
+  ## now copy machine, disks, nics to new ORM objects (yuck, oh well)
+  ## and database.session.save(those)
+  database.session.commit()
+

 
 ## power on if desired
 
 ## power on if desired

+
+