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cluster.go
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cluster.go
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// 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 bootstrap
import (
"context"
"encoding/json"
"fmt"
"net"
"os"
"path/filepath"
"strings"
"time"
talosnet "github.com/talos-systems/net"
taloscluster "github.com/talos-systems/talos/pkg/cluster"
"github.com/talos-systems/talos/pkg/cluster/check"
clientconfig "github.com/talos-systems/talos/pkg/machinery/client/config"
"github.com/talos-systems/talos/pkg/machinery/config/types/v1alpha1/bundle"
"github.com/talos-systems/talos/pkg/machinery/config/types/v1alpha1/generate"
"github.com/talos-systems/talos/pkg/machinery/config/types/v1alpha1/machine"
"github.com/talos-systems/talos/pkg/provision"
"github.com/talos-systems/talos/pkg/provision/access"
"github.com/talos-systems/talos/pkg/provision/providers/qemu"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/strategicpatch"
"github.com/talos-systems/sidero/sfyra/pkg/constants"
)
// Cluster sets up initial Talos cluster.
type Cluster struct {
options Options
provisioner provision.Provisioner
cluster provision.Cluster
access *access.Adapter
bridgeIP net.IP
masterIP net.IP
stateDir string
cniDir string
configPath string
}
// Options for the bootstrap cluster.
type Options struct {
Name string
CIDR string
Vmlinuz, Initramfs string
InstallerImage string
CNIBundleURL string
TalosctlPath string
RegistryMirrors []string
MemMB int64
CPUs int64
DiskGB int64
}
// NewCluster creates new bootstrap Talos cluster.
func NewCluster(ctx context.Context, options Options) (*Cluster, error) {
cluster := &Cluster{
options: options,
}
var err error
cluster.provisioner, err = qemu.NewProvisioner(ctx)
if err != nil {
return nil, err
}
return cluster, nil
}
// Setup the bootstrap cluster.
func (cluster *Cluster) Setup(ctx context.Context) error {
var err error
cluster.configPath, err = clientconfig.GetDefaultPath()
if err != nil {
return err
}
defaultStateDir, err := clientconfig.GetTalosDirectory()
if err != nil {
return err
}
cluster.stateDir = filepath.Join(defaultStateDir, "clusters")
cluster.cniDir = filepath.Join(defaultStateDir, "cni")
fmt.Printf("bootstrap cluster state directory: %s, name: %s\n", cluster.stateDir, cluster.options.Name)
if err = cluster.findExisting(ctx); err != nil {
fmt.Printf("bootstrap cluster not found: %s, creating new one\n", err)
err = cluster.create(ctx)
}
if err != nil {
return err
}
checkCtx, checkCtxCancel := context.WithTimeout(ctx, 10*time.Minute)
defer checkCtxCancel()
if err = check.Wait(checkCtx, cluster.access, check.DefaultClusterChecks(), check.StderrReporter()); err != nil {
return err
}
return cluster.untaint(ctx)
}
func (cluster *Cluster) findExisting(ctx context.Context) error {
var err error
cluster.cluster, err = cluster.provisioner.Reflect(ctx, cluster.options.Name, cluster.stateDir)
if err != nil {
return err
}
config, err := clientconfig.Open(cluster.configPath)
if err != nil {
return err
}
_, cidr, err := net.ParseCIDR(cluster.options.CIDR)
if err != nil {
return err
}
cluster.bridgeIP, err = talosnet.NthIPInNetwork(cidr, 1)
if err != nil {
return err
}
cluster.masterIP, err = talosnet.NthIPInNetwork(cidr, 2)
if err != nil {
return err
}
cluster.access = access.NewAdapter(cluster.cluster, provision.WithTalosConfig(config))
return nil
}
func (cluster *Cluster) create(ctx context.Context) error {
_, cidr, err := net.ParseCIDR(cluster.options.CIDR)
if err != nil {
return err
}
cluster.bridgeIP, err = talosnet.NthIPInNetwork(cidr, 1)
if err != nil {
return err
}
cluster.masterIP, err = talosnet.NthIPInNetwork(cidr, 2)
if err != nil {
return err
}
request := provision.ClusterRequest{
Name: cluster.options.Name,
Network: provision.NetworkRequest{
Name: cluster.options.Name,
CIDRs: []net.IPNet{*cidr},
GatewayAddrs: []net.IP{cluster.bridgeIP},
MTU: constants.MTU,
Nameservers: constants.Nameservers,
CNI: provision.CNIConfig{
BinPath: []string{filepath.Join(cluster.cniDir, "bin")},
ConfDir: filepath.Join(cluster.cniDir, "conf.d"),
CacheDir: filepath.Join(cluster.cniDir, "cache"),
BundleURL: cluster.options.CNIBundleURL,
},
},
KernelPath: cluster.options.Vmlinuz,
InitramfsPath: cluster.options.Initramfs,
SelfExecutable: cluster.options.TalosctlPath,
StateDirectory: cluster.stateDir,
}
defaultInternalLB, _ := cluster.provisioner.GetLoadBalancers(request.Network)
genOptions := cluster.provisioner.GenOptions(request.Network)
for _, registryMirror := range cluster.options.RegistryMirrors {
parts := strings.SplitN(registryMirror, "=", 2)
if len(parts) != 2 {
return fmt.Errorf("unexpected registry mirror format: %q", registryMirror)
}
genOptions = append(genOptions, generate.WithRegistryMirror(parts[0], parts[1]))
}
masterEndpoint := cluster.masterIP.String()
configBundle, err := bundle.NewConfigBundle(bundle.WithInputOptions(
&bundle.InputOptions{
ClusterName: cluster.options.Name,
Endpoint: fmt.Sprintf("https://%s:6443", defaultInternalLB),
GenOptions: append(
genOptions,
generate.WithEndpointList([]string{masterEndpoint}),
generate.WithInstallImage(cluster.options.InstallerImage),
generate.WithDNSDomain("cluster.local"),
),
}))
if err != nil {
return err
}
request.Nodes = append(request.Nodes,
provision.NodeRequest{
Name: constants.BootstrapMaster,
Type: machine.TypeControlPlane,
IPs: []net.IP{cluster.masterIP},
Memory: cluster.options.MemMB * 1024 * 1024,
NanoCPUs: cluster.options.CPUs * 1000 * 1000 * 1000,
Disks: []*provision.Disk{
{
Size: uint64(cluster.options.DiskGB) * 1024 * 1024 * 1024,
},
},
Config: configBundle.ControlPlane(),
})
cluster.cluster, err = cluster.provisioner.Create(ctx, request,
provision.WithBootlader(true),
// TODO: UEFI doesn't work correctly on PXE timeout, as it drops to UEFI shell
// provision.WithUEFI(true),
provision.WithTalosConfig(configBundle.TalosConfig()),
)
if err != nil {
return err
}
cluster.access = access.NewAdapter(cluster.cluster, provision.WithTalosConfig(configBundle.TalosConfig()))
c, err := clientconfig.Open(cluster.configPath)
if err != nil {
return err
}
c.Merge(configBundle.TalosConfig())
if err = c.Save(cluster.configPath); err != nil {
return err
}
if err = cluster.access.Bootstrap(ctx, os.Stderr); err != nil {
return err
}
return nil
}
func (cluster *Cluster) untaint(ctx context.Context) error {
clientset, err := cluster.access.K8sClient(ctx)
if err != nil {
return err
}
n, err := clientset.CoreV1().Nodes().Get(ctx, constants.BootstrapMaster, metav1.GetOptions{})
if err != nil {
return err
}
oldData, err := json.Marshal(n)
if err != nil {
return fmt.Errorf("failed to marshal unmodified node %q into JSON: %w", n.Name, err)
}
n.Spec.Taints = []corev1.Taint{}
newData, err := json.Marshal(n)
if err != nil {
return fmt.Errorf("failed to marshal modified node %q into JSON: %w", n.Name, err)
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, corev1.Node{})
if err != nil {
return fmt.Errorf("failed to create two way merge patch: %w", err)
}
if _, err := clientset.CoreV1().Nodes().Patch(ctx, n.Name, types.StrategicMergePatchType, patchBytes, metav1.PatchOptions{}); err != nil {
return fmt.Errorf("error patching node %q: %w", n.Name, err)
}
return nil
}
// TearDown the bootstrap cluster.
func (cluster *Cluster) TearDown(ctx context.Context) error {
if cluster.cluster != nil {
if err := cluster.provisioner.Destroy(ctx, cluster.cluster); err != nil {
return err
}
cluster.cluster = nil
}
return nil
}
// KubernetesClient returns k8s client access adapter.
func (cluster *Cluster) KubernetesClient() taloscluster.K8sProvider {
return &cluster.access.KubernetesClient
}
// SideroComponentsIP returns the IP of the master node.
func (cluster *Cluster) SideroComponentsIP() net.IP {
return cluster.masterIP
}
// BridgeIP returns the IP of the gateway (bridge).
func (cluster *Cluster) BridgeIP() net.IP {
return cluster.bridgeIP
}
// Name returns cluster name.
func (cluster *Cluster) Name() string {
return cluster.cluster.Info().ClusterName
}