We adapt the existing code to work across all zones in a region.
We require a feature-flag to enable Ubernetes-Lite
Reasons:
* There are some behavioural changes if users create volumes with
the same name in two zones.
* We don't want to make one API call per zone if we're not running
Ubernetes-Lite.
* Ubernetes-Lite is still experimental.
There isn't a parallel flag implemented for AWS, because at the moment
there would be no behaviour changes from this.
Used like:
var pod *api.Pod
err := client.RetryOnConflict(client.DefaultBackoff, func() (err error) {
pod, err = c.Pods("mynamespace").UpdateStatus(update)
return
})
// err may be conflict
This address a TODO when collecting the node version information so it
will properly report the configured runtime and its version. Previously,
this was hardcoded to "docker://" and the docker version, and would show
"docker://1.9.1" even when the kubelet was configured to use rkt.
With this change, it will use the runtime's Type() and Version() data.
This also changes the container.Runtime interface to add an APIVersion()
method. This can be used when the runtime has separate versions for the
engine and the API, such as with Docker. The Docker minimum version
validation has been updated to use APIVersion(), and
DockerManager.Version() now returns the engine version.
This is for internal use at the moment, for testing Ubernetes Lite, but
arguably makes the code a little cleaner.
Also rename KUBE_SHARE_MASTER -> KUBE_USE_EXISTING_MASTER
findInstancesByNodeNames was a simple loop around
findInstanceByNodeName, which made an EC2 API call for each call.
We've had trouble with this sort of behaviour hitting EC2 rate limits on
bigger clusters (e.g. #11979).
Instead, change this method to fetch _all_ the tagged EC2 instances, and
then loop through the local results. This is one API call (modulo
paging).
We are currently only using findInstancesByNodeNames for the load
balancer, where we attach every node, so we were fetching all but one of
the instances anyway.
Issue #11979
The version of Salt we're running doesn't do a good job of detecting
systemd. Inspired by https://github.com/saltstack/salt/issues/13926,
I added a provider-force to the services.
With this change, salt-call -l debug state.highstate succeeds, even for
repeated invocations.
The issue was (probably) benign, but definitely caused noised (e.g. #11297)
I got the package name wrong before, which meant that salt was failing
on invocations after the first (the name apparently doesn't matter on
the first invocation).
Support a desired replica count of 0 for the new RC. Users sometimes
want to roll out a new "inactive" template with the intent of scaling
it up manually later.
