For Eucalyptus 4.0.1 requesting metadata seem to work differently as with EC2.
In Euca:
> curl http://169.254.169.254/2009-04-04
<?xml version="1.0"?><Response><Errors><Error><Code>404 Not Found</Code><Message>unknown</Message></Error></Errors><RequestID>unknown</RequestID></Response>core@localhost ~ $
> curl http://169.254.169.254/2009-04-04/
dynamic
meta-data
user-data
In AWS EC2
> curl http://169.254.169.254/2009-04-04
"" (zero bytes)
> curl http://169.254.169.254/2009-04-04/
dynamic
meta-data
user-data
As the isAvailable() function in metadata.go tests only for errorcode
it fails in Euca.
As it turns out, certain metadata is only present in the ec2 flavor
of metadata (e.g. public_ipv4) and other data is only present in
the openstack flavor (e.g. network_config). For now, just read the
openstack metadata.
Remove the root url parameter for -from-metadata-service since this
is a guarenteed value. Additionally, check for both ec2 and openstack
urls for the metadata and userdata. Fix a bug with the -from-url
option and a panic on an empty response.
Move the old metadata-service datasource to url datasource. This new datasource
checks for the existance of meta-data.json and if it doesn't exist, walks the
meta-data directory to build a metadata blob.
Supports retries with exponential backoff as well as connection
timeouts and the ability to skip SSL/TLS verification.
This commit also refactors datasource and initialize packages
in order to use the new HTTP client.
- Adds URL validations
- Adds timeout support for http client
- Limits the amount of retries to not spin forever
- Fails faster if response status code is 4xx
- Does a little bit more of logging
- Adds more tests
The user-cloudinit-proc-cmdline systemd unit is responsible for
fetching user-data from various sources during the cloud-init
process. When fetching user-data from an URL datasource we face
a race condition since the network may not be available, which
can cause the job to fail and no further attempts to fetch the
user-data are made.
Eliminate the race condition when fetching user-data from an URL
datasource. Retry the fetch using an exponential backoff until
the user-data is retrieved.
Fixes issue 105.
