Updates the dhcp-all-interfaces element to fix a race
with the recent udev rules implementation on Fedora.
With the new approach we make the udev rule want (require
to startup) a generic dhcp-interface@.service template which
can be started individually for each interface that is
discovered.
The dhcp-interface@.service is setup such that it:
1) It calls dhcp-all-interfaces <iface> directly with
a pre-exec script. This creates the ifcfg file right
before we need it but avoids the case where network.service
might get greedy and try to start it itself.
2) Only runs if the ifcfg script doesn't already exist. This
is important because we only need to bootstrap the DHCP configs...
Once they exist the network.service will take care of starting them
on reboots, upgrades, etc.
3) On initial boot ensure that the initial DHCP interfaces come
up after network.service. Since we really only want
dhcp-all-interfaces to help bootstrap that haven't already
been configured this seems reasonable.
4) We also try to ensure that cloud-init
comes up after the DHCP interfaces. Cloud init has a decently
long timeout that this wasn't a functional problem but it keeps
log file spew down.
Change-Id: I71b026f027182aad49c3435bb903e5e38e524685
Closes-bug: #1294803
Refactors dhcp-all-interfaces.sh so that if an optional
INTERFACE argument (the first argument) is passed to the script
it only inspects that single interface. If no argument is
passed then the previous default behaviour is used which
causes all interfaces to be inspected.
To avoid a collision with the previous $1 we move to using
$FLOCKED for the exec flock command which runs on distributions
using ENI.
Also sets PATH so that the commands within the script
can all be found if it isn't set properly (/sbin/ip, /bin/cat, etc.)
This is a move towards using udev rules to add these types
of interfaces automatically.
Change-Id: I3ec8fd2cc2071bfc6943c744ca619e31b71146fc
Updates the dhcp-all-interfaces element so that
we add new DHCP interfaces using a udev rule
instead of a systemd service.
The previous approach (using the systemd service)
was proving to be problematic when used with
the new Fedora constistent network naming
convention rules (em1, em2, etc.). We aren't using
these device names as a default yet... but we will
need to soon and when we do udev rules seem to be the
best way to avoid racy behaviour when calling
dhcp-all-interfaces.sh from the systemd service.
Change-Id: I87e0aed1f34718e896bd414388886a1f1073b0c0
Rename generate-interfaces-file.sh to dhcp-all-interfaces.sh
so that it is easier to find/remember in the $PATH on a deployed
image.
Also, on some distros the script actually generates many files
so the previous name was a bit confusing.
Change-Id: I7152fa7c28e8ade251311da2cd5f75972423b66c
Includes:
* Enhancements to the generate-interfaces-file.sh script
so that it generates ifcfg network-scripts for
distros like Fedora/RHEL.
* Includes a new dhcp-all-interfaces.service systemd
script which ensures network interfaces get generated
before the network service starts on Fedora.
* Add a new disable_interface function to
generate-interfaces-file.sh which (on Fedora)
will delete the ifcfg config for an interface which
isn't plugged in.
This is important because ifcfg-eth0 exists by default
and we want to remove it if the NIC isn't connected.
Previous behaviour on Ubuntu is unchanged and the
generate-interfaces-file.sh just logs it as skipped.
* General doc updates...
I tested this on a multi-nic machine w/ Fedora where the first NIC
exists but was not connected.
Change-Id: Ia99e312539da43caefd72aa60398d43dac5dcc8f
Closes-Bug: 1239880
Since we are using bash syntax in some of the element fragments,
we should make sure we use bash for all of them, so that things don't
break on systems where /bin/sh != /bin/bash.
Change-Id: If2f043c57aa4e1492b7f9839213ef6123f683612
If the /etc/init drectory gets created on Fedora, it causes
os-svc-daemon to add upstart init scripts instead of systemd.
As a result none of the openstack services can start.
Partial-Bug: #1239880
Change-Id: Iec317baa3eb9ff651fa66c582d2f614993cde45e
Ensures that all network interfaces are present in
/etc/network/interfaces. Any interface not already defined there
will be added and configured for DHCP.
Change-Id: I27e0902e62804e8d719acd7288109bd0e294fd16
