This PR changes how we version going forward in the following ways:
* mark-new-version.sh is changed to a new policy of just splitting
branches, rather than the old backmerge policy, as discussed in
vX.Y.0, and a tag for vX.(Y+1).0-alpha.0 back to master.
* I eliminated PRs back to master by making the version/base.go
gitVersion and gitCommit just be `export-subst`. I testing that this
works with GitHub's source export tarballs. There's no reason to
bother with forcing the version into `base.go` (especially twice). The
tarball versions outside a git tree aren't perfect (master looks like
"v0.0.0+hash", and the release branches look more accurate), but our
build contract has never allowed that version is perfect in this
situation, so I think we can relax this.
* That master tag gets picked up by "git describe" on master, so e.g.
master would have immediately become v1.1.0-alpha.0
* In order to be more semVer compatible, the gitVersion field for the
master branch now looks something like 1.1.0-alpha.0.6+84c76d1142ea4d.
This is a tiny translation of the "git describe". I did this because
there are a ton of consumers out there of the "gitVersion" field
expecting it to be the full version, but it would be nice if this
field were actually semver compliant. (1.1.0-alpha.0-6-84c76d1142ea4d
is, but it's not *usefully* so.)
Fixes#11495
Currently setting the `--allocate-node-cidrs` flag to true with an
empty cloud provider causes the kube-controller-manager to crash during
startup.
Fix the issue by checking for an empty cloud provider before setting
up route management on the cloud provider. This change introduces a
change in behavior. The kube-controller-manager now supports allocating
pod CIDRs without a cloud provider. This means users must manage routes
through some other mechanism.
The controller manager logs a warning if `--allocate-node-cidrs` is set,
but not a cloud provider:
```
I0725 17:10:41.587888 43185 plugins.go:70] No cloud provider specified.
I0725 17:10:41.588036 43185 nodecontroller.go:114] Sending events to api server.
E0725 17:10:41.588122 43185 controllermanager.go:201] Failed to start service controller: ServiceController should not be run without a cloudprovider.
W0725 17:10:41.588136 43185 controllermanager.go:213] allocate-node-cidrs is set, but no cloud provider specified. Will not manage routes.
E0725 17:10:41.589703 43185 nodecontroller.go:187] Error monitoring node status: Get http://127.0.0.1:8080/api/v1/nodes: dial tcp 127.0.0.1
```
Fixes#11866
kube-apiserver.service has 'ExecStartPre=/usr/bin/mkdir -p /var/lib/kube-apiserver', but if server is not fast enough 'mv /home/core/known_tokens.csv /var/lib/kube-apiserver/known_tokens.csv' will fail.
