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

61 lines
1.9 KiB
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 firecracker implements Provisioner via Firecracker VMs.
package firecracker
import (
"context"
"github.com/talos-systems/talos/internal/app/machined/pkg/runtime"
"github.com/talos-systems/talos/internal/pkg/provision"
"github.com/talos-systems/talos/pkg/config/types/v1alpha1"
"github.com/talos-systems/talos/pkg/config/types/v1alpha1/generate"
)
const stateFileName = "state.yaml"
type provisioner struct {
}
// NewProvisioner initializes docker provisioner.
func NewProvisioner(ctx context.Context) (provision.Provisioner, error) {
p := &provisioner{}
return p, nil
}
// Close and release resources.
func (p *provisioner) Close() error {
return nil
}
// GenOptions provides a list of additional config generate options.
func (p *provisioner) GenOptions(networkReq provision.NetworkRequest) []generate.GenOption {
nameservers := make([]string, len(networkReq.Nameservers))
for i := range nameservers {
nameservers[i] = networkReq.Nameservers[i].String()
}
return []generate.GenOption{
generate.WithInstallDisk("/dev/vda"),
generate.WithNetworkConfig(&v1alpha1.NetworkConfig{
NameServers: nameservers,
NetworkInterfaces: []runtime.Device{
{
Interface: "eth0",
CIDR: "169.254.128.128/32", // link-local IP just to trigger the static networkd config
MTU: networkReq.MTU,
},
},
}),
}
}
// GetLoadBalancers returns internal/external loadbalancer endpoints.
func (p *provisioner) GetLoadBalancers(networkReq provision.NetworkRequest) (internalEndpoint, externalEndpoint string) {
// firecracker runs loadbalancer on the bridge, which is good for both internal & external access
return networkReq.GatewayAddr.String(), networkReq.GatewayAddr.String()
}