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cloud-init uses dhclient to fetch the DHCP lease so it can extract
DHCP options. dhclient creates the leasefile, then writes to it;
simply waiting for the leasefile to appear creates a race between
dhclient and cloud-init. Instead, wait for dhclient to be parented by
init. At that point, we know it has written to the leasefile, so it's
safe to copy the file and kill the process.
cloud-init creates a temporary directory in which to execute dhclient,
and deletes that directory after it has killed the process. If
cloud-init abandons waiting for dhclient to daemonize, it will still
attempt to delete the temporary directory, but will not report an
exception should that attempt fail.
LP: #1794399
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It is possible to have a metric value in a per-subnet route.
This is currently missing in all renderers. Update each
renderer to emit the correct metric value from the config.
LP: #1805871
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We add a new Optional parameter: connectivity_url
This is used in __enter__ to verify if a connection already exists.
If it does exist, no operations are performed.
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In commitish 9073951 azure datasource tried to leverage stale DHCP
information obtained from EphemeralDHCPv4 context manager to report
updated provisioning status to the fabric earlier in the boot process.
Unfortunately the stale ephemeral network configuration had already been
torn down in preparation to bring up IMDS network config so the report
attempt failed on timeout.
This branch introduces obtain_lease and clean_network public methods on
EphemeralDHCPv4 to allow for setup and teardown of ephemeral network
configuration without using a context manager. Azure datasource now uses
this to persist ephemeral network configuration across multiple contexts
during provisioning to avoid multiple DHCP roundtrips.
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Previously we explicitly excluded mac address '00:00:00:00:00:00'.
But then some nics (tunl0 and sit0) ended up having a mac address like
'00:00:00:00'.
The change here just ignores all 00[:00[:00...]].
LP: #1796917
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OpenStack ironic references Infiniband interfaces via a 6 byte 'MAC
address' formed from bytes 13-15 and 18-20 of interface's hardware
address. This address is used as the ethernet_mac_address of Infiniband
links in network_data.json in configdrives generated by OpenStack nova.
We can use this address to map links in network_data.json to their
corresponding interface names.
When generating interface configuration files, we need to use the
interface's full hardware address as the HWADDR, rather than the 6 byte
MAC address provided by network_data.json.
This change allows IB interfaces to be referenced in this dual mode - by
MAC address and hardware address, depending on the context.
Support TYPE=InfiniBand for sysconfig configuration of IB interfaces.
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On OpenStack based OVH public cloud, we got DHCP response with
fixed-address 54.36.113.86;
option subnet-mask 255.255.255.255;
option routers 54.36.112.1;
The router clearly is not on the subnet. So 'ip' would fail when
we tried to add the default route.
The solution here is to add an explicit route on that interface
to the router and then add the default route.
Also add 'bgpovs' to the list of 'physical' types for OpenStack
network configuration. That type is used on OVH public cloud.
LP: #1792415
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In many cases, cloud-init uses 'util.subp' to run a subprocess.
This is not really desirable in our unit tests as it makes the tests
dependent upon existance of those utilities.
The change here is to modify the base test case class (CiTestCase) to
raise exception any time subp is called. Then, fix all callers.
For cases where subp is necessary or actually desired, we can use it
via
a.) context hander CiTestCase.allow_subp(value)
b.) class level self.allowed_subp = value
Both cases the value is a list of acceptable executable names that
will be called (essentially argv[0]).
Some cleanups in AltCloud were done as the code was being updated.
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Multiple distros use sysconfig format but have different content
and paths to certain files. Update distros to specify these
template paths in their renderer_configs dictionary.
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When converting network config v1 to netplan, we were not correctly
rendering the 'macaddress' key on a bond. Not that the difference
in spelling between v1 'mac_address' and v2 'macaddress' is intentional.
Also fixed here is rendering of the macaddress for bridges.
LP: #1784699
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When network configuration for any interface defines maximum transmission
values (MTU) the netplan, eni and sysconfig renders will take into account
any device-level, or subnet-level mtu values.
When network configuration has conflicting device-level and ipv4 subnet
mtu values, the subnet-specific value is honored and a warning will be
logged about any ignored device-level setting.
LP: #1774666
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When attempting to apply network configuration for SmartOS's container
platform, cloud-init would not identify nics. The nics on provided
in this container service do not have 'addr_assign_type'. That
was being interpreted as being a "stolen" mac, and would be filtered
out by get_interfaces.
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The cloud-init-local.service expects that any network device name changes
have already been completed by the kernel or udev daemon.
In some situations we've found that the renaming of interfaces from kernel
names (eth0, eth1, etc) to their persistent names (eno1, ens3, enp0s1,
etc) may happen after cloud-init-local has started where it reads values
from sysfs about what network devices are present, and which device to use
as a fallback nic.
Subsequently, cloud-init-local would write out network configuration for a
kernel device name which would no longer be present by the time that
networking services start to bring up the devices. The result is that the
instance does not get networking configured. Prior to use of
systemd-networkd, the Ubuntu 'networking.service' unit included a call to
udevadm settle which is why this race is not seen on a Xenial system.
This change adds the ability to detect if an interface has a stable name,
if if we find one without stable names and stable names have not been
disabled (net.ifnames=0 in /proc/cmdline), then cloud-init will invoke
udevadm settle.
LP: #1766287
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BOOTPROTO=dhcp in sysconfig enables DHCPv4 and we should not do this
implicitly when 'dhcp6' subnet is specified. In case both dhcpv4 and
dhcpv6 are needed users should specify both:
subnets:
- type: dhcp6
- type: dhcp
Fix the current code and add a dhcpv6 only test.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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This enables warnings produced by pylint for unused variables (W0612),
and fixes the existing errors.
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The net-tools package is deprecated and will eventually be dropped. Use
"ip route", "link" or "address" instead of "ifconfig" or "route" calls.
Cloud-init can now run in an environment that no longer has net-tools.
This affects the network and route printing emitted to
cloud-config-output.log as well as the cc_disable_ec2_metadata module.
Additional changes:
- separate readResource and resourceLocation into standalone test
functions
- Fix ipv4 address rows to report scopes represented by ip addr show
- Formatted route/address ouput now handles multiple ipv4 and ipv6
addresses on a single interface
Co-authored-by: James Hogarth <james.hogarth@gmail.com>
Co-authored-by: Robert Schweikert <rjschwei@suse.com>
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In network config v1 format, there are dns values which are not bound to a
specific interface and do not map to the per-interface format in netplan.
To handle this case we render netplan configuration that duplicates the
DNS configuration on any interface that has a static network config. We
avoiding interfaces which have DHCP configuration which may provide
conflicting DNS values.
LP: #1750884
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OpenNebulaNetwork.gen_conf() was previously returning ENI format.
This is updated to return netplan/v2 config.
The changes here also adds support for IPv6 configuration distributed
from OpenNebula and fixes some issues about nameserver information.
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When 'ip=' or 'ip6=' is found on the kernel command line,
cloud-init will consider read network config from /run/net-*.conf files.
There are some iscsi-root scenarios where initramfs configures networking
but the ip= parameter is not present. 2 such cases are:
a.) static config in /etc/iscsi/iscsi.initramfs (copied into the
initramfs)
b.) iBft
This changes cloud-init to consider initramfs provided networking
information if:
* there are /run/net-* files and
* (ip= or ip6 is on the command line) or open-iscsi.interface file
exists.
LP: #1752391
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Update netplan renderer to write out bridge port-priority values
now that netplan supports the feature.
LP: #1735821
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net.apply_network_config_names currently only accepts network-config
in version 1 format. When users include a netplan format network-config the
rename code does not find any of the 'set-name' directives and does not rename
any of the interfaces. This causes some netplan configurations to fail.
This patch adds support for parsing netplan format and extracts the needed
information (macaddress and set-name values) to allow cloud-init to issue
interface rename commands. We know raise a RuntimeError if presented with
an unknown config format.
LP: #1709715
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This change will enable azure vms to report provisioning has completed
twice, first to tell the fabric it has completed then a second time to
enable customer settings. The datasource for the second provisioning is
the Instance Metadata Service (IMDS),and the VM will poll indefinitely for
the new ovf-env.xml from IMDS.
This branch introduces EphemeralDHCPv4 which encapsulates common logic
used by both DataSourceEc2 an DataSourceAzure for temporary DHCP
interactions without side-effects.
LP: #1734991
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Network configuration in OpenNebula would only work if the host correctly
guessed the names of the devices in the guest. OpenNebula provided data
in its context.sh like 'ETH0_NETWORK', but if the guest named devices
differently then results were not predictable. This would occur with
Predictable Network Interface Names. To address this,
newer versions (of OpenNebula provide the mac address ETH0_MAC.
This function is present in 4.14 and documented officially in 5.0 docs.
This provides support for reading the mac addresses from the context.sh.
It also fixes cases where context.sh provided a field (ETH0_NETWORK
or ETH0_MASK) with a empty string. Previously the empty string would
be used rather than falling back to the default.
LP: #1719157, #1716397, #1736750
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This branch resolves lints seen by pylint revision 1.8.1 and updates our
pinned tox pylint dependency used by our tox pylint target.
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There is a race condition where our sandboxed dhclient properly writes a
lease file but has not yet written a pid file. If the sandbox temporary
directory is torn down before the dhclient subprocess writes a pidfile
DataSourceEc2Local gets a traceback and the instance will fallback to
DataSourceEc2 in the init-network stage. This wastes boot cycles we'd
rather not spend.
Fix handling of sandboxed dhclient to wait for both pidfile and leasefile
before proceding. If either file doesn't show in 5 seconds, log a warning
and return empty lease results {}.
LP: #1735331
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Currently when dns and dns search info is provided, it is not rendered
when outputting to sysconfig format.
This patch causes the DNS and DOMAIN lines to be written out rendering
sysconfig.
LP: #1705804
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If user upgraded to new cloud-init and attempted to run 'cloud-init init'
without rebooting, cloud-init restores the datasource object from pickle.
The older version pickled datasource object had no value for
_network_config or fallback_nic. This caused the Ec2 datasource to attempt
to reconfigure networking with a None fallback_nic. The pickled object
also cached an older version of ec2 metadata which didn't contain network
information.
This branch does two things:
- Add a fallback_interface property to DatasourceEC2 to support reading the
old .fallback_nic attribute if it was set. New versions will
call net.find_fallback_nic() if there has not been one found.
- Re-crawl metadata if we are on Ec2 and don't have a 'network' key in
metadata
LP: #1732917
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dhclient runs, obtains a address and then backgrounds itself.
cloud-init did not take care to kill it after it was done with it.
After it has run and created the leases, we can kill it.
LP: #1732964
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Update unit tests to pass a 0 instead of 'off' to validate that network
state is properly written.
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Update network_state to store the bridge_stp value as a boolean.
The various renderers then can map the boolean value to the correct
output as needed; eni uses 'on/off', sysconfig uses 'yes/no' and
netplan will use the boolean directly.
Update unittest values for sysconfig and netplan. Both contained the
network_state string value which resulted in not correctly enable/disable
STP in the target system.
Update network_state comment (fd -> forward-delay, add stp as boolean) on
bridge commands to match the expected format of a netplan bridge command.
LP: #1721157
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Systems that used systemd-networkd's dhcp client would not be able to get
information on the Azure endpoint (placed in Option 245) or the CloudStack
server (in 'server_address').
The change here supports reading these files in /run/systemd/netif/leases.
The files declare that "This is private data. Do not parse.", but at this
point we do not have another option.
LP: #1718029
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The package cloudinit was sparsely added to only the makefile's unittest
target and tox's py3 target. This branch adds cloudinit package to 'make
unittest3' and all tox environments. It tweaks one cloudinit unit test to
use mocked_object.call_count instead of mocked_object.assert_called_once
which is not defined in some python unittest versions.
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/run/cloud-init/tmp is on a filesystem mounted noexec, so running
dchlient in Ec2Local during discovery breaks with 'Permission denied'.
This branch allows us to run from a different tmp dir so we have exec
rights.
LP: #1717627
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During boot, the usage of /tmp is not safe. In systemd systems,
systemd-tmpfiles-clean may run at any point and clear out a temp file
while cloud-init is using it. The solution here is to use
/run/cloud-init/tmp.
LP: #1707222
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This moves the base test case classes into into cloudinit/tests and
updates all the corresponding imports.
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If the network-config sent to cloud-init is in version: 2 format then
when rendering netplan, we can pass the content through and avoid
consuming network_state elements. This removes the need for trying to
map many v2 features onto network state where other renderers won't be
able to use anyhow (for example match parameters for multi-interface
configuration and wifi configuration support).
Additionally ensure we retain bond/bridge v2 configuration in network
state so when rendering to eni or sysconfig we don't lose the configuration
- Drop the NotImplemented wifi exception, log a warning that it works for
netplan only
- Adjust unittests to new code path and output
- Fix issue with v2 macaddress values getting dropped
- Add unittests for consuming/validating v2 configurations
LP: #1709180
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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
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get_interfaces_by_mac and get_interfaces just looked much alike.
This makes get_interfaces_by_mac call get_interfaces.
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The sysconfig renderer duplicates the cloud-init header string
when rendering resolv.conf file. This leads to resolv.conf file
growing with every reboot of a system. Fix this by checking for
the header when loading content from existing file.
Update one of the sysconfig unittests with multiple render calls
to simulate the reboot to check that we don't repeat the header.
LP: #1701420
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This is not yet called, but will be called in a subsequent Ec2-related branch to manually initialize a network interface with the responses using dhcp discovery without any dhcp-script side-effects. The functionality has been tested on Ec2 ubuntu and CentOS vms to ensure that network interface initialization works in both OS-types.
Since there was poor unit test coverage for the cloudinit.net.__init__ module, this branch adds a bunch of coverage to the functions in cloudinit.net.__init. We can also now have unit tests local to the cloudinit modules. The benefits of having unittests under cloudinit module:
- Proximity of unittest to cloudinit module makes it easier for ongoing devs to know where to augment unit tests. The tests.unittest directory is organizated such that it
- Allows for 1 to 1 name mapping module -> tests/test_module.py
- Improved test and module isolation, if we find unit tests have to import from a number of modules besides the module under test, it will better prompt resturcturing of the module.
This also branch touches:
- tox.ini to run unit tests found in cloudinit as well as include all test-requirements for pylint since we now have unit tests living within cloudinit package
- setup.py to exclude any test modules under cloudinit when packaging
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The subnet type 'manual' was used as a way to declare a device
and set an MTU for it but not assign network addresses.
This updates the manual example config to handle that case and
provides expected rendered output for sysconfig, eni, and netplan.
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Previously, sysconfig rendered HWADDR for all interface types, but
that value is only used to identify physical devices. Instead use
MACADDR to configure the MAC on virtual devices, like bonds and
bridges.
- Sort bond slave list to ensure consistent ordering in sysconfig
rendered files.
- Add unittests for sysconfig rendering of bonds/bridges with
mac_address
LP: #1701417
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In some network configurations a network value of '::' and a
netmask value of '::' were used to indicate a default IPV6 gateway.
Commit d00da2d5 removed ipv6 'netmask' attributes and calculate
a prefix length value instead. The eni route rendering failed to update
the check to use prefix value of 0 to indicate the presence of an IPV6
default route.
A broken ipv6 default route rendered like:
post-up route add -net :: netmask :: gw 2001:4800:78ff:1b::1 || true
And with this patch, it now renders like:
post-up route add -A inet6 default gw 2001:4800:78ff:1b::1 || true
LP: #1701097
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Render MTU values if present in subnet and route configurations
for v4 and v6.
LP: #1702513
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Implement manual control for sysconfig by using ONBOOT=N. This
allows an interface to be configured but not brought up.
Note that ONBOOT is per-interface not per address.
LP: #1687725
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Currently only the subnet is checked for 'ipv6' setting, however, the
routes array may include a mix of v4 or v6 configurations, in particular,
the gateway in a route may be ipv6, and if so, should export the value via
IPV6_DEFAULTGW in the ifcfg-XXXX file.
Additionally, if the route is v6, it should rendering a routes6-XXXX file;
this is present but missing the 'dev <interface>' scoping.
LP: #1694801
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Previously, virtual types (bond, bridge, vlan) were almost completely
broken. They would not get any network configuration (ip addresses or
dhcp config) and or routes rendered. This fixes those issues.
For bonds we now correctly render BONDING_SLAVE entries.
Also add tests for simple bond, bridge and vlan.
LP: #1695092
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With this change, entries in IPV6ADDR and IPV6ADDR_SECONDARIES will now
always be in format addr/prefix. When a subnet has a gateway will be
written. If the gateway is ipv6, use the key IPV6_DEFAULTGW rather than
GATEWAY.
LP: #1704872
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The network device renaming code previously required the case of
the mac address input to match that of the data read from the system.
For example, if user provided network config with mac address
in upper case, then cloud-init would not rename the device correctly
as /sys/class/net/address stores lower case values.
The fix here is to always compare lower case mac addresses.
LP: #1705147
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This includes a few fixes found when testing with python 3.6.
- fix eni renderer when target is None
This just uses the util.target_path() in the event that target is None.
- change test cases to not rely on the cached result of
util.get_cmdline() and other cached globals. Update the base TestCase
to unset that cache.
- mock calls to system_is_snappy from the create_users test cases.
- drop unused _pp_root in test_simple_run.py
LP: #1703697
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