Brad Beam d8249c8779
refactor(init): Allow kubeadm init on controlplane (#658)
* refactor(init): Allow kubeadm init on controlplane

This shifts the cluster formation from init(bootstrap) and join(control plane)
to init(control plane).

This makes use of the previously implemented initToken to provide a TTL for
cluster initialization to take place and allows us to mostly treat all control
plane nodes equal. This also sets up the path for us to handle master upgrades
and not be concerned with odd behavior when upgrading the previously defined
init node.

To facilitate kubeadm init across all control plane nodes, we make use of the
initToken to run `kubeadm init phase certs` command to generate any missing
certificates once. All other control plane nodes will attempt to sync the
necessary certs/files via all defined trustd endpoints and being the startup
process.

* feat(init): Add service runner context to PreFunc

Signed-off-by: Brad Beam <brad.beam@talos-systems.com>
2019-05-24 16:05:49 -05:00

40 lines
1.5 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 system
import (
"context"
"github.com/talos-systems/talos/internal/app/init/pkg/system/conditions"
"github.com/talos-systems/talos/internal/app/init/pkg/system/health"
"github.com/talos-systems/talos/internal/app/init/pkg/system/runner"
"github.com/talos-systems/talos/pkg/userdata"
)
// Service is an interface describing a system service.
type Service interface {
// ID is the service id.
ID(*userdata.UserData) string
// PreFunc is invoked before a runner is created
PreFunc(context.Context, *userdata.UserData) error
// Runner creates runner for the service
Runner(*userdata.UserData) (runner.Runner, error)
// PostFunc is invoked after a runner is closed.
PostFunc(*userdata.UserData) error
// Condition describes the conditions under which a service should
// start.
Condition(*userdata.UserData) conditions.Condition
// DependsOn returns list of service IDs this service depends on.
DependsOn(*userdata.UserData) []string
}
// HealthcheckedService is a service which provides health check
type HealthcheckedService interface {
// HealtFunc provides function that checks health of the service
HealthFunc(*userdata.UserData) health.Check
// HealthSettings returns settings for the health check
HealthSettings(*userdata.UserData) *health.Settings
}