This makes a small jump to the new etcd stable release. This isn't a
major difference, but it includes an important patch in
7814718c73149e2bbb9517cd02edb8332b621d86 which caused mgmt users to
scratch their heads, since it wasn't obvious that etcd was doing a Fatal
instead of a Panic or an error.
This is a giant cleanup of the etcd code. The earlier version was
written when I was less experienced with golang.
This is still not perfect, and does contain some races, but at least
it's a decent base to start from. The automatic elastic clustering
should be considered an experimental feature. If you need a more
battle-tested cluster, then you should manage etcd manually and point
mgmt at your existing cluster.
This requires breaking changes in gofmt. It is hilarious that this was
changed. Oh well. This also moves to the latest stable etcd. Lastly,
this changes the `go vet` testing to test by package, since the new go
vet changed how it works and now fails without this change.
The docker project absurdly *copies* all of the dependencies into the
vendor/ directory instead of using git submodules or avoiding
unnecessary vendoring entirely. We manually remove these changes until
they learn to use tools how they're intended.
As an aside, we recommend using a more intelligent, modern tool like
systemd-nspawn instead.
This is an initial implementation of the mgmt language. It is a
declarative (immutable) functional, reactive, domain specific
programming language. It is intended to be a language that is:
* safe
* powerful
* easy to reason about
With these properties, we hope this language, and the mgmt engine will
allow you to model the real-time systems that you'd like to automate.
This also includes a number of other associated changes. Sorry for the
large size of this patch.
Note: When go-grpc-prometheus was in the main $gopath (even at this
version) and everyone else was where they always were in vendor/ this
didn't build! It gave errors like:
have SendHeader("github.com/purpleidea/mgmt/vendor/google.golang.org/grpc/metadata".MD) error
want SendHeader("google.golang.org/grpc/metadata".MD) error
and I got frustrated. Putting it "next" to the other vendored deps seems
to have fixed this. Where are the golang docs that explain this
phenomenon?
This also requires golang 1.8+ as that is a requirement for etcd. It's
probably a reasonable thing for us too.
Note the older versions of etcd had some bugs with the concurrency
package and other things, so this is a necessary bump.
