| Age | Commit message (Collapse) | Author |
|---|
|
VPC instances have the option to specific local only IPv4 addresses. Allow
Ec2Datasource to enable dhcp4 on instances even if local-ipv4s is
configured on an instance.
Also limit network_configuration to only the primary (fallback) nic.
LP: #1728152
|
|
This change makes the DataSourceEc2Local do nothing unless it is on
actual AWS platform. The motivation is twofold:
a.) It is generally safer to only make this function available to Ec2
clones that explicitly identify themselves to the guest. (It also
gives them a reason to supply identification code to cloud-init.)
b.) On non-intel OpenStack platforms ds-identify would enable both the Ec2
and OpenStack sources. That is because there is not good data (such as
dmi) to positively identify the platform. Previously that would be fine
as OpenStack would run first and be successful. The change to add Ec2Local
meant that an Ec2 now runs first.
The best case for 'b' would be a slow down as attempts at the Ec2 metadata
service time out. The discovered case was worse.
Additionally we add a simple check for datatype of 'network' in the
metadata before attempting to read it.
LP: #1715128
|
|
This moves the base test case classes into into cloudinit/tests and
updates all the corresponding imports.
|
|
DataSourceEc2 behavior changed to first check a minimum acceptable
metadata version uri http://169.154.169.254/<min_version>/instance-id,
retrying on 404, until the metadata service is available. After the
metadata service is up, the datasource inspects preferred
extended_metadata_versions for availability. Unit tests only mocked the
preferred extended_metadata_version so all Ec2 tests were retrying
attempts against
http://169.254.169.254/meta-data/<min-version>/instance-id adding a lot of
time cost to the unit test runs.
This branch uses httpretty to properly mock the following:
- 404s from metadata on undesired extended_metadata_version test routes
- https://169.254.169.254/meta-data/2016-09-02/instance-id
- full metadata dictionary represented on min_metadata_version
- https://169.254.169.254/meta-data/2016-09-02/*
The branch also tightens httpretty to raise a MockError for any URL which
isn't mocked via httpretty.HTTPretty.allow_net_connect=False.
LP: #1714117
|
|
DataSourceEc2 now parses the metadata for each nic to determine if
configured for ipv6 and/or ipv4 addresses. In AWS for metadata version
2016-09-02, nics configured for ipv4 or ipv6 addresses will have non-zero
values stored in metadata at network/interfaces/macs/<MAC>/public-ipv4 or
ipv6s respectively. Those metadata files are only non-zero when an ipv4 or
ipv6 ip is associated to the specific nic. A new
DataSourceEc2.network_config property is added which parses the metadata
and renders a network version 1 dictionary representing both dhcp4 and
dhcp6 configuration for associated nics.
The network configuration returned from the datasource will also 'pin' the
nic name to the name presented on the instance for each nic.
LP: #1639030
|
|
This branch is a prerequisite for IPv6 support in AWS by allowing Ec2
datasource to query the metadata source version 2016-09-02 about whether
or not it needs to configure IPv6 on interfaces. If version 2016-09-02
is not present, fallback to the min_metadata_version of 2009-04-04. The
DataSourceEc2Local not run on FreeBSD because dhclient in doesn't
support the -sf flag allowing us to run dhclient without filesystem
side-effects.
To query AWS' metadata address @ 169.254.169.254, the instance must have
a dhcp-allocated address configured. Configuring IPv4 link-local
addresses result in timeouts from the metadata service. We introduced a
DataSourceEc2Local subclass which will perform a sandboxed dhclient
discovery which obtains an authorized IP address on eth0 and crawl
metadata about full instance network configuration.
Since ec2 IPv6 metadata is not sufficient in itself to tell us all the
ipv6 knownledge we need, it only be used as a boolean to tell us which
nics need IPv6. Cloud-init will then configure desired interfaces to
DHCPv6 versus DHCPv4.
Performance side note: Shifting the dhcp work into init-local for Ec2
actually gets us 1 second faster deployments by skipping init-network
phase of alternate datasource checks because Ec2Local is configured in
an ealier boot stage. In 3 test runs prior to this change: cloud-init
runs were 5.5 seconds, with the change we now average 4.6 seconds.
This efficiency could be even further improved if we avoiding dhcp
discovery in order to talk to the metadata service from an AWS
authorized dhcp address if there were some way to advertize the dhcp
configuration via DMI/SMBIOS or system environment variables.
Inspecting time costs of the dhclient setup/teardown in 3 live runs the
time cost for the dhcp setup round trip on AWS is:
test 1: 76 milliseconds
dhcp discovery + metadata: 0.347 seconds
metadata alone: 0.271 seconds
test 2: 88 milliseconds
dhcp discovery + metadata: 0.388 seconds
metadata alone: 0.300 seconds
test 3: 75 milliseconds
dhcp discovery + metadata: 0.366 seconds
metadata alone: 0.291 seconds
LP: #1709772
|
|
EC2 was the original, but this adds some initial tests for that datasource.
Also updates a docstring for an internal method.
|
