[Bug 1182646] Re: maas-import-pxe-files fails to update ephemeral images

[Andres Rodriguez]

** Description changed:

+ Wed, 22 May 2013 21:54:59 +0100: finished. wrote to /var/lib/maas/ephemeral/.working/maas-import-ephemerals.mnccmE/precise/amd64/dist-root.tar.gz
+ cmd failed: maas-provision install-pxe-image --arch=amd64 --subarch=generic --release=precise --purpose=commissioning --image=/tmp/tmp.KQXnCcCqmc --symlink=xinstall
+ Traceback (most recent call last):
+   File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
+     "__main__", fname, loader, pkg_name)
+   File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
+     exec code in run_globals
+   File "/usr/lib/python2.7/dist-packages/provisioningserver/__main__.py", line 39, in <module>
+     main()
+   File "/usr/lib/python2.7/dist-packages/provisioningserver/utils.py", line 400, in __call__
+     self.execute(argv)
+   File "/usr/lib/python2.7/dist-packages/provisioningserver/utils.py", line 395, in execute
+     args.handler.run(args)
+   File "/usr/lib/python2.7/dist-packages/provisioningserver/pxe/install_image.py", line 165, in run
+     install_dir(args.image, destination, args.symlink)
+   File "/usr/lib/python2.7/dist-packages/provisioningserver/pxe/install_image.py", line 127, in install_dir
+     os.symlink(old, sdest)
+ OSError: [Errno 17] File exists
+ failed to install tftp image [rel: precise, arch: amd64: name: maas-precise-daily-amd64-ephemeral-20130520]
+ 
+ 
  [Impact]
  If new ephemeral images are ready to be installed, maas-import-* scripts fail because it cannot overwrite a symlink that has been created to support FPI. This prevents maas from importing new ephemeral images.
  
  [Test Case]
  1. Install maas.
  2. maas-import-pxe-files
  3. edit /etc/maas/import_ephemerals and add STREAM="daily"
  4. run maas-import-pxe-files again, it will download a newer ephemeral image and will fail to install it.
  5. Apply the fix.
  6. Run maas-import-pxe-files again, and it will install the image successfully.
  
  [Regression Potential]
  Minimal, this make sure that a new image being imported gets installed successfully.

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https://bugs.launchpad.net/bugs/1182646

Title:
  maas-import-pxe-files fails to update ephemeral images

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