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107 lines
1.9 KiB
107 lines
1.9 KiB
package cluster
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import (
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"bytes"
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"context"
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"fmt"
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"os"
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"path/filepath"
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"github.com/rancher/k3s/pkg/bootstrap"
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"github.com/rancher/k3s/pkg/clientaccess"
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"github.com/sirupsen/logrus"
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)
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func (c *Cluster) Join(ctx context.Context) error {
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runJoin, err := c.shouldJoin()
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if err != nil {
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return err
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}
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c.runJoin = runJoin
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if runJoin {
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if err := c.join(ctx); err != nil {
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return err
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}
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}
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return nil
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}
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func (c *Cluster) shouldJoin() (bool, error) {
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dqlite := c.dqliteEnabled()
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if dqlite {
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c.runtime.HTTPBootstrap = true
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if c.config.JoinURL == "" {
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return false, nil
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}
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}
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stamp := c.joinStamp()
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if _, err := os.Stat(stamp); err == nil {
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logrus.Info("Cluster bootstrap already complete")
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return false, nil
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}
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if dqlite && c.config.Token == "" {
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return false, fmt.Errorf("K3S_TOKEN is required to join a cluster")
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}
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return true, nil
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}
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func (c *Cluster) joined() error {
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if err := os.MkdirAll(filepath.Dir(c.joinStamp()), 0700); err != nil {
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return err
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}
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if _, err := os.Stat(c.joinStamp()); err == nil {
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return nil
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}
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f, err := os.Create(c.joinStamp())
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if err != nil {
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return err
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}
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return f.Close()
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}
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func (c *Cluster) httpJoin() error {
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token, err := clientaccess.NormalizeAndValidateTokenForUser(c.config.JoinURL, c.config.Token, "server")
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if err != nil {
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return err
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}
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info, err := clientaccess.ParseAndValidateToken(c.config.JoinURL, token)
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if err != nil {
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return err
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}
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c.clientAccessInfo = info
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content, err := clientaccess.Get("/v1-k3s/server-bootstrap", info)
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if err != nil {
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return err
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}
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return bootstrap.Read(bytes.NewBuffer(content), &c.runtime.ControlRuntimeBootstrap)
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}
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func (c *Cluster) join(ctx context.Context) error {
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c.joining = true
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if c.runtime.HTTPBootstrap {
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return c.httpJoin()
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}
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if err := c.storageJoin(ctx); err != nil {
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return err
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}
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return nil
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}
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func (c *Cluster) joinStamp() string {
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return filepath.Join(c.config.DataDir, "db/joined-"+keyHash(c.config.Token))
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}
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