Andrew Rynhard 49307d554d refactor: improve machined
This is a rewrite of machined. It addresses some of the limitations and
complexity in the implementation. This introduces the idea of a
controller. A controller is responsible for managing the runtime, the
sequencer, and a new state type introduced in this PR.

A few highlights are:

- no more event bus
- functional approach to tasks (no more types defined for each task)
  - the task function definition now offers a lot more context, like
    access to raw API requests, the current sequence, a logger, the new
    state interface, and the runtime interface.
- no more panics to handle reboots
- additional initialize and reboot sequences
- graceful gRPC server shutdown on critical errors
- config is now stored at install time to avoid having to download it at
  install time and at boot time
- upgrades now use the local config instead of downloading it
- the upgrade API's preserve option takes precedence over the config's
  install force option

Additionally, this pulls various packes in under machined to make the
code easier to navigate.

Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>
2020-04-28 08:20:55 -07:00

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Go

// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package check
import "github.com/talos-systems/talos/internal/app/machined/pkg/runtime"
// Option represents functional option.
type Option func(o *Options) error
// WithNodeTypes sets the node types for a check.
func WithNodeTypes(t ...runtime.MachineType) Option {
return func(o *Options) error {
o.Types = t
return nil
}
}
// Options describes ClusterCheck parameters.
type Options struct {
Types []runtime.MachineType
}
// DefaultOptions returns the default options.
func DefaultOptions() *Options {
return &Options{}
}