Andrey Smirnov 2bf8540855 test: provision Talos clusters via Firecracker VMs
This is initial PR to push the initial code, it has several known
problems which are going to be addressed in follow-up PRs:

1. there's no "cluster destroy", so the only way to stop the VMs is to
`pkill firecracker`

2. provisioner creates state in `/tmp` and never deletes it, that is
required to keep cluster running when `osctl cluster create` finishes

3. doesn't run any controller process around firecracker to support
reboots/CNI cleanup (vethxyz interfaces are lingering on the host as
they're never cleaned up)

The plan is to create some structure in `~/.talos` to manage cluster
state, e.g. `~/.talos/clusters/<name>` which will contain all the
required files (disk images, file sockets, VM logs, etc.). This
directory structure will also work as a way to detect running clusters
and clean them up.

For point number 3, `osctl cluster create` is going to exec lightweight
process to control the firecracker VM process and to simulate VM reboots
if firecracker finishes cleanly (when VM reboots).

Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
2020-01-16 00:27:08 +03:00

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1.0 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 docker implements Provisioner via docker.
package docker
import (
"context"
"github.com/docker/docker/client"
"github.com/talos-systems/talos/internal/pkg/provision"
"github.com/talos-systems/talos/pkg/config/types/v1alpha1/generate"
)
type provisioner struct {
client *client.Client
}
// NewProvisioner initializes docker provisioner.
func NewProvisioner(ctx context.Context) (provision.Provisioner, error) {
p := &provisioner{}
var err error
p.client, err = client.NewEnvClient()
if err != nil {
return nil, err
}
return p, nil
}
// Close and release resources.
func (p *provisioner) Close() error {
if p.client != nil {
return p.client.Close()
}
return nil
}
// GenOptions provides a list of additional config generate options.
func (p *provisioner) GenOptions() []generate.GenOption {
return nil
}