mirror of https://github.com/k3s-io/k3s
680 lines
25 KiB
Go
680 lines
25 KiB
Go
package config
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import (
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"bufio"
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"context"
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cryptorand "crypto/rand"
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"crypto/tls"
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"encoding/hex"
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"encoding/pem"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/url"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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"strings"
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"time"
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"github.com/k3s-io/k3s/pkg/agent/containerd"
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"github.com/k3s-io/k3s/pkg/agent/proxy"
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agentutil "github.com/k3s-io/k3s/pkg/agent/util"
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"github.com/k3s-io/k3s/pkg/cli/cmds"
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"github.com/k3s-io/k3s/pkg/clientaccess"
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"github.com/k3s-io/k3s/pkg/daemons/config"
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"github.com/k3s-io/k3s/pkg/daemons/control/deps"
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"github.com/k3s-io/k3s/pkg/util"
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"github.com/k3s-io/k3s/pkg/version"
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"github.com/pkg/errors"
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"github.com/rancher/wrangler/pkg/slice"
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"github.com/sirupsen/logrus"
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"k8s.io/apimachinery/pkg/util/json"
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)
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const (
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DefaultPodManifestPath = "pod-manifests"
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)
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// Get returns a pointer to a completed Node configuration struct,
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// containing a merging of the local CLI configuration with settings from the server.
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// A call to this will bock until agent configuration is successfully returned by the
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// server.
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func Get(ctx context.Context, agent cmds.Agent, proxy proxy.Proxy) *config.Node {
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ticker := time.NewTicker(5 * time.Second)
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defer ticker.Stop()
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RETRY:
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for {
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agentConfig, err := get(ctx, &agent, proxy)
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if err != nil {
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logrus.Infof("Waiting to retrieve agent configuration; server is not ready: %v", err)
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for range ticker.C {
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continue RETRY
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}
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}
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return agentConfig
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}
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}
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// KubeProxyDisabled returns a bool indicating whether or not kube-proxy has been disabled in the
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// server configuration. The server may not have a complete view of cluster configuration until
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// after all startup hooks have completed, so a call to this will block until after the server's
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// readyz endpoint returns OK.
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func KubeProxyDisabled(ctx context.Context, node *config.Node, proxy proxy.Proxy) bool {
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ticker := time.NewTicker(5 * time.Second)
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defer ticker.Stop()
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RETRY:
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for {
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disabled, err := getKubeProxyDisabled(ctx, node, proxy)
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if err != nil {
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logrus.Infof("Waiting to retrieve kube-proxy configuration; server is not ready: %v", err)
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for range ticker.C {
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continue RETRY
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}
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}
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return disabled
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}
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}
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// APIServers returns a list of apiserver endpoints, suitable for seeding client loadbalancer configurations.
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// This function will block until it can return a populated list of apiservers, or if the remote server returns
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// an error (indicating that it does not support this functionality).
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func APIServers(ctx context.Context, node *config.Node, proxy proxy.Proxy) []string {
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ticker := time.NewTicker(5 * time.Second)
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defer ticker.Stop()
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RETRY:
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for {
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addresses, err := getAPIServers(ctx, node, proxy)
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if err != nil {
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logrus.Infof("Failed to retrieve list of apiservers from server: %v", err)
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return nil
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}
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if len(addresses) == 0 {
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logrus.Infof("Waiting for apiserver addresses")
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for range ticker.C {
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continue RETRY
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}
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}
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return addresses
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}
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}
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type HTTPRequester func(u string, client *http.Client, username, password, token string) ([]byte, error)
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func Request(path string, info *clientaccess.Info, requester HTTPRequester) ([]byte, error) {
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u, err := url.Parse(info.BaseURL)
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if err != nil {
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return nil, err
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}
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u.Path = path
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return requester(u.String(), clientaccess.GetHTTPClient(info.CACerts, info.CertFile, info.KeyFile), info.Username, info.Password, info.Token())
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}
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func getNodeNamedCrt(nodeName string, nodeIPs []net.IP, nodePasswordFile string) HTTPRequester {
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return func(u string, client *http.Client, username, password, token string) ([]byte, error) {
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req, err := http.NewRequest(http.MethodGet, u, nil)
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if err != nil {
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return nil, err
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}
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if token != "" {
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req.Header.Add("Authorization", "Bearer "+token)
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} else if username != "" {
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req.SetBasicAuth(username, password)
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}
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req.Header.Set(version.Program+"-Node-Name", nodeName)
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nodePassword, err := ensureNodePassword(nodePasswordFile)
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if err != nil {
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return nil, err
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}
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req.Header.Set(version.Program+"-Node-Password", nodePassword)
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req.Header.Set(version.Program+"-Node-IP", util.JoinIPs(nodeIPs))
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resp, err := client.Do(req)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode == http.StatusForbidden {
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return nil, fmt.Errorf("Node password rejected, duplicate hostname or contents of '%s' may not match server node-passwd entry, try enabling a unique node name with the --with-node-id flag", nodePasswordFile)
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("%s: %s", u, resp.Status)
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}
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return io.ReadAll(resp.Body)
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}
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}
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func ensureNodeID(nodeIDFile string) (string, error) {
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if _, err := os.Stat(nodeIDFile); err == nil {
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id, err := os.ReadFile(nodeIDFile)
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return strings.TrimSpace(string(id)), err
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}
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id := make([]byte, 4, 4)
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_, err := cryptorand.Read(id)
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if err != nil {
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return "", err
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}
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nodeID := hex.EncodeToString(id)
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return nodeID, os.WriteFile(nodeIDFile, []byte(nodeID+"\n"), 0644)
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}
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func ensureNodePassword(nodePasswordFile string) (string, error) {
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if _, err := os.Stat(nodePasswordFile); err == nil {
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password, err := os.ReadFile(nodePasswordFile)
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return strings.TrimSpace(string(password)), err
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}
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password := make([]byte, 16, 16)
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_, err := cryptorand.Read(password)
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if err != nil {
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return "", err
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}
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nodePassword := hex.EncodeToString(password)
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return nodePassword, os.WriteFile(nodePasswordFile, []byte(nodePassword+"\n"), 0600)
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}
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func upgradeOldNodePasswordPath(oldNodePasswordFile, newNodePasswordFile string) {
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password, err := os.ReadFile(oldNodePasswordFile)
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if err != nil {
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return
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}
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if err := os.WriteFile(newNodePasswordFile, password, 0600); err != nil {
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logrus.Warnf("Unable to write password file: %v", err)
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return
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}
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if err := os.Remove(oldNodePasswordFile); err != nil {
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logrus.Warnf("Unable to remove old password file: %v", err)
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return
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}
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}
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func getServingCert(nodeName string, nodeIPs []net.IP, servingCertFile, servingKeyFile, nodePasswordFile string, info *clientaccess.Info) (*tls.Certificate, error) {
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servingCert, err := Request("/v1-"+version.Program+"/serving-kubelet.crt", info, getNodeNamedCrt(nodeName, nodeIPs, nodePasswordFile))
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if err != nil {
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return nil, err
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}
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servingCert, servingKey := splitCertKeyPEM(servingCert)
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if err := os.WriteFile(servingCertFile, servingCert, 0600); err != nil {
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return nil, errors.Wrapf(err, "failed to write node cert")
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}
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if err := os.WriteFile(servingKeyFile, servingKey, 0600); err != nil {
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return nil, errors.Wrapf(err, "failed to write node key")
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}
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cert, err := tls.X509KeyPair(servingCert, servingKey)
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if err != nil {
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return nil, err
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}
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return &cert, nil
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}
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func getHostFile(filename, keyFile string, info *clientaccess.Info) error {
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basename := filepath.Base(filename)
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fileBytes, err := info.Get("/v1-" + version.Program + "/" + basename)
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if err != nil {
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return err
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}
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if keyFile == "" {
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if err := os.WriteFile(filename, fileBytes, 0600); err != nil {
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return errors.Wrapf(err, "failed to write cert %s", filename)
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}
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} else {
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fileBytes, keyBytes := splitCertKeyPEM(fileBytes)
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if err := os.WriteFile(filename, fileBytes, 0600); err != nil {
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return errors.Wrapf(err, "failed to write cert %s", filename)
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}
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if err := os.WriteFile(keyFile, keyBytes, 0600); err != nil {
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return errors.Wrapf(err, "failed to write key %s", filename)
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}
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}
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return nil
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}
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func splitCertKeyPEM(bytes []byte) (certPem []byte, keyPem []byte) {
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for {
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b, rest := pem.Decode(bytes)
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if b == nil {
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break
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}
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bytes = rest
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if strings.Contains(b.Type, "PRIVATE KEY") {
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keyPem = append(keyPem, pem.EncodeToMemory(b)...)
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} else {
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certPem = append(certPem, pem.EncodeToMemory(b)...)
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}
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}
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return
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}
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func getNodeNamedHostFile(filename, keyFile, nodeName string, nodeIPs []net.IP, nodePasswordFile string, info *clientaccess.Info) error {
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basename := filepath.Base(filename)
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fileBytes, err := Request("/v1-"+version.Program+"/"+basename, info, getNodeNamedCrt(nodeName, nodeIPs, nodePasswordFile))
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if err != nil {
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return err
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}
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fileBytes, keyBytes := splitCertKeyPEM(fileBytes)
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if err := os.WriteFile(filename, fileBytes, 0600); err != nil {
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return errors.Wrapf(err, "failed to write cert %s", filename)
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}
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if err := os.WriteFile(keyFile, keyBytes, 0600); err != nil {
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return errors.Wrapf(err, "failed to write key %s", filename)
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}
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return nil
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}
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func isValidResolvConf(resolvConfFile string) bool {
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file, err := os.Open(resolvConfFile)
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if err != nil {
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return false
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}
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defer file.Close()
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nameserver := regexp.MustCompile(`^nameserver\s+([^\s]*)`)
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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ipMatch := nameserver.FindStringSubmatch(scanner.Text())
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if len(ipMatch) == 2 {
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ip := net.ParseIP(ipMatch[1])
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if ip == nil || !ip.IsGlobalUnicast() {
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return false
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}
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}
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}
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if err := scanner.Err(); err != nil {
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return false
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}
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return true
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}
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func locateOrGenerateResolvConf(envInfo *cmds.Agent) string {
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if envInfo.ResolvConf != "" {
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return envInfo.ResolvConf
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}
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resolvConfs := []string{"/etc/resolv.conf", "/run/systemd/resolve/resolv.conf"}
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for _, conf := range resolvConfs {
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if isValidResolvConf(conf) {
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return conf
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}
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}
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resolvConf := filepath.Join(envInfo.DataDir, "agent", "etc", "resolv.conf")
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if err := agentutil.WriteFile(resolvConf, "nameserver 8.8.8.8\n"); err != nil {
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logrus.Errorf("Failed to write %s: %v", resolvConf, err)
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return ""
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}
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logrus.Warnf("Host resolv.conf includes loopback or multicast nameservers - kubelet will use autogenerated resolv.conf with nameserver 8.8.8.8")
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return resolvConf
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}
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func get(ctx context.Context, envInfo *cmds.Agent, proxy proxy.Proxy) (*config.Node, error) {
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if envInfo.Debug {
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logrus.SetLevel(logrus.DebugLevel)
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}
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clientKubeletCert := filepath.Join(envInfo.DataDir, "agent", "client-kubelet.crt")
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clientKubeletKey := filepath.Join(envInfo.DataDir, "agent", "client-kubelet.key")
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withCert := clientaccess.WithClientCertificate(clientKubeletCert, clientKubeletKey)
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info, err := clientaccess.ParseAndValidateToken(proxy.SupervisorURL(), envInfo.Token, withCert)
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if err != nil {
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return nil, err
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}
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controlConfig, err := getConfig(info)
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if err != nil {
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return nil, errors.Wrap(err, "failed to retrieve configuration from server")
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}
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// If the supervisor and externally-facing apiserver are not on the same port, tell the proxy where to find the apiserver.
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if controlConfig.SupervisorPort != controlConfig.HTTPSPort {
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_, isIPv6, _ := util.GetFirstString([]string{envInfo.NodeIP.String()})
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if err := proxy.SetAPIServerPort(ctx, controlConfig.HTTPSPort, isIPv6); err != nil {
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return nil, errors.Wrapf(err, "failed to setup access to API Server port %d on at %s", controlConfig.HTTPSPort, proxy.SupervisorURL())
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}
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}
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var flannelIface *net.Interface
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if controlConfig.FlannelBackend != config.FlannelBackendNone && len(envInfo.FlannelIface) > 0 {
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flannelIface, err = net.InterfaceByName(envInfo.FlannelIface)
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if err != nil {
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return nil, errors.Wrapf(err, "unable to find interface")
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}
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}
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clientCAFile := filepath.Join(envInfo.DataDir, "agent", "client-ca.crt")
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if err := getHostFile(clientCAFile, "", info); err != nil {
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return nil, err
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}
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serverCAFile := filepath.Join(envInfo.DataDir, "agent", "server-ca.crt")
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if err := getHostFile(serverCAFile, "", info); err != nil {
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return nil, err
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}
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servingKubeletCert := filepath.Join(envInfo.DataDir, "agent", "serving-kubelet.crt")
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servingKubeletKey := filepath.Join(envInfo.DataDir, "agent", "serving-kubelet.key")
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nodePasswordRoot := "/"
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if envInfo.Rootless {
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nodePasswordRoot = filepath.Join(envInfo.DataDir, "agent")
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}
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nodeConfigPath := filepath.Join(nodePasswordRoot, "etc", "rancher", "node")
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if err := os.MkdirAll(nodeConfigPath, 0755); err != nil {
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return nil, err
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}
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oldNodePasswordFile := filepath.Join(envInfo.DataDir, "agent", "node-password.txt")
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newNodePasswordFile := filepath.Join(nodeConfigPath, "password")
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upgradeOldNodePasswordPath(oldNodePasswordFile, newNodePasswordFile)
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nodeName, nodeIPs, err := util.GetHostnameAndIPs(envInfo.NodeName, envInfo.NodeIP)
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if err != nil {
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return nil, err
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}
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nodeExternalIPs, err := util.ParseStringSliceToIPs(envInfo.NodeExternalIP)
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if err != nil {
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return nil, fmt.Errorf("invalid node-external-ip: %w", err)
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}
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if envInfo.WithNodeID {
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nodeID, err := ensureNodeID(filepath.Join(nodeConfigPath, "id"))
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if err != nil {
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return nil, err
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}
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nodeName += "-" + nodeID
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}
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os.Setenv("NODE_NAME", nodeName)
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nodeExternalAndInternalIPs := append(nodeIPs, nodeExternalIPs...)
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servingCert, err := getServingCert(nodeName, nodeExternalAndInternalIPs, servingKubeletCert, servingKubeletKey, newNodePasswordFile, info)
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if err != nil {
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return nil, err
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}
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if err := getNodeNamedHostFile(clientKubeletCert, clientKubeletKey, nodeName, nodeIPs, newNodePasswordFile, info); err != nil {
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return nil, err
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}
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kubeconfigKubelet := filepath.Join(envInfo.DataDir, "agent", "kubelet.kubeconfig")
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if err := deps.KubeConfig(kubeconfigKubelet, proxy.APIServerURL(), serverCAFile, clientKubeletCert, clientKubeletKey); err != nil {
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return nil, err
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}
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clientKubeProxyCert := filepath.Join(envInfo.DataDir, "agent", "client-kube-proxy.crt")
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clientKubeProxyKey := filepath.Join(envInfo.DataDir, "agent", "client-kube-proxy.key")
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if err := getHostFile(clientKubeProxyCert, clientKubeProxyKey, info); err != nil {
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return nil, err
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}
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kubeconfigKubeproxy := filepath.Join(envInfo.DataDir, "agent", "kubeproxy.kubeconfig")
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if err := deps.KubeConfig(kubeconfigKubeproxy, proxy.APIServerURL(), serverCAFile, clientKubeProxyCert, clientKubeProxyKey); err != nil {
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return nil, err
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}
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clientK3sControllerCert := filepath.Join(envInfo.DataDir, "agent", "client-"+version.Program+"-controller.crt")
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clientK3sControllerKey := filepath.Join(envInfo.DataDir, "agent", "client-"+version.Program+"-controller.key")
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if err := getHostFile(clientK3sControllerCert, clientK3sControllerKey, info); err != nil {
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return nil, err
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}
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kubeconfigK3sController := filepath.Join(envInfo.DataDir, "agent", version.Program+"controller.kubeconfig")
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if err := deps.KubeConfig(kubeconfigK3sController, proxy.APIServerURL(), serverCAFile, clientK3sControllerCert, clientK3sControllerKey); err != nil {
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return nil, err
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}
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nodeConfig := &config.Node{
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Docker: envInfo.Docker,
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SELinux: envInfo.EnableSELinux,
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ContainerRuntimeEndpoint: envInfo.ContainerRuntimeEndpoint,
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MultiClusterCIDR: controlConfig.MultiClusterCIDR,
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FlannelBackend: controlConfig.FlannelBackend,
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FlannelIPv6Masq: controlConfig.FlannelIPv6Masq,
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FlannelExternalIP: controlConfig.FlannelExternalIP,
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EgressSelectorMode: controlConfig.EgressSelectorMode,
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ServerHTTPSPort: controlConfig.HTTPSPort,
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Token: info.String(),
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}
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nodeConfig.FlannelIface = flannelIface
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nodeConfig.Images = filepath.Join(envInfo.DataDir, "agent", "images")
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nodeConfig.AgentConfig.NodeName = nodeName
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nodeConfig.AgentConfig.NodeConfigPath = nodeConfigPath
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nodeConfig.AgentConfig.ClientKubeletCert = clientKubeletCert
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nodeConfig.AgentConfig.ClientKubeletKey = clientKubeletKey
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nodeConfig.AgentConfig.ServingKubeletCert = servingKubeletCert
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nodeConfig.AgentConfig.ServingKubeletKey = servingKubeletKey
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nodeConfig.AgentConfig.ClusterDNS = controlConfig.ClusterDNS
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nodeConfig.AgentConfig.ClusterDomain = controlConfig.ClusterDomain
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nodeConfig.AgentConfig.ResolvConf = locateOrGenerateResolvConf(envInfo)
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nodeConfig.AgentConfig.ClientCA = clientCAFile
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|
nodeConfig.AgentConfig.KubeConfigKubelet = kubeconfigKubelet
|
|
nodeConfig.AgentConfig.KubeConfigKubeProxy = kubeconfigKubeproxy
|
|
nodeConfig.AgentConfig.KubeConfigK3sController = kubeconfigK3sController
|
|
if envInfo.Rootless {
|
|
nodeConfig.AgentConfig.RootDir = filepath.Join(envInfo.DataDir, "agent", "kubelet")
|
|
}
|
|
nodeConfig.AgentConfig.Snapshotter = envInfo.Snapshotter
|
|
nodeConfig.AgentConfig.IPSECPSK = controlConfig.IPSECPSK
|
|
nodeConfig.Containerd.Config = filepath.Join(envInfo.DataDir, "agent", "etc", "containerd", "config.toml")
|
|
nodeConfig.Containerd.Root = filepath.Join(envInfo.DataDir, "agent", "containerd")
|
|
nodeConfig.CRIDockerd.Root = filepath.Join(envInfo.DataDir, "agent", "cri-dockerd")
|
|
if !nodeConfig.Docker && nodeConfig.ContainerRuntimeEndpoint == "" {
|
|
switch nodeConfig.AgentConfig.Snapshotter {
|
|
case "overlayfs":
|
|
if err := containerd.OverlaySupported(nodeConfig.Containerd.Root); err != nil {
|
|
return nil, errors.Wrapf(err, "\"overlayfs\" snapshotter cannot be enabled for %q, try using \"fuse-overlayfs\" or \"native\"",
|
|
nodeConfig.Containerd.Root)
|
|
}
|
|
case "fuse-overlayfs":
|
|
if err := containerd.FuseoverlayfsSupported(nodeConfig.Containerd.Root); err != nil {
|
|
return nil, errors.Wrapf(err, "\"fuse-overlayfs\" snapshotter cannot be enabled for %q, try using \"native\"",
|
|
nodeConfig.Containerd.Root)
|
|
}
|
|
case "stargz":
|
|
if err := containerd.StargzSupported(nodeConfig.Containerd.Root); err != nil {
|
|
return nil, errors.Wrapf(err, "\"stargz\" snapshotter cannot be enabled for %q, try using \"overlayfs\" or \"native\"",
|
|
nodeConfig.Containerd.Root)
|
|
}
|
|
nodeConfig.AgentConfig.ImageServiceSocket = "/run/containerd-stargz-grpc/containerd-stargz-grpc.sock"
|
|
}
|
|
}
|
|
nodeConfig.Containerd.Opt = filepath.Join(envInfo.DataDir, "agent", "containerd")
|
|
nodeConfig.Containerd.Log = filepath.Join(envInfo.DataDir, "agent", "containerd", "containerd.log")
|
|
nodeConfig.Containerd.Debug = envInfo.Debug
|
|
applyContainerdStateAndAddress(nodeConfig)
|
|
applyCRIDockerdAddress(nodeConfig)
|
|
nodeConfig.Containerd.Template = filepath.Join(envInfo.DataDir, "agent", "etc", "containerd", "config.toml.tmpl")
|
|
nodeConfig.Certificate = servingCert
|
|
|
|
nodeConfig.AgentConfig.NodeIPs = nodeIPs
|
|
nodeIP, listenAddress, _, err := util.GetFirstIP(nodeIPs)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "cannot configure IPv4/IPv6 node-ip")
|
|
}
|
|
nodeConfig.AgentConfig.NodeIP = nodeIP.String()
|
|
nodeConfig.AgentConfig.ListenAddress = listenAddress
|
|
nodeConfig.AgentConfig.NodeExternalIPs = nodeExternalIPs
|
|
|
|
// if configured, set NodeExternalIP to the first IPv4 address, for legacy clients
|
|
// unless only IPv6 address given
|
|
if len(nodeConfig.AgentConfig.NodeExternalIPs) > 0 {
|
|
nodeExternalIP, _, _, err := util.GetFirstIP(nodeConfig.AgentConfig.NodeExternalIPs)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "cannot configure IPv4/IPv6 node-external-ip")
|
|
}
|
|
nodeConfig.AgentConfig.NodeExternalIP = nodeExternalIP.String()
|
|
}
|
|
|
|
nodeConfig.NoFlannel = nodeConfig.FlannelBackend == config.FlannelBackendNone
|
|
if !nodeConfig.NoFlannel {
|
|
hostLocal, err := exec.LookPath("host-local")
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "failed to find host-local")
|
|
}
|
|
|
|
if envInfo.FlannelConf == "" {
|
|
nodeConfig.FlannelConfFile = filepath.Join(envInfo.DataDir, "agent", "etc", "flannel", "net-conf.json")
|
|
} else {
|
|
nodeConfig.FlannelConfFile = envInfo.FlannelConf
|
|
nodeConfig.FlannelConfOverride = true
|
|
}
|
|
nodeConfig.AgentConfig.CNIBinDir = filepath.Dir(hostLocal)
|
|
nodeConfig.AgentConfig.CNIConfDir = filepath.Join(envInfo.DataDir, "agent", "etc", "cni", "net.d")
|
|
nodeConfig.AgentConfig.FlannelCniConfFile = envInfo.FlannelCniConfFile
|
|
}
|
|
|
|
if nodeConfig.Docker {
|
|
nodeConfig.AgentConfig.CNIPlugin = true
|
|
nodeConfig.AgentConfig.RuntimeSocket = nodeConfig.CRIDockerd.Address
|
|
} else if nodeConfig.ContainerRuntimeEndpoint == "" {
|
|
nodeConfig.AgentConfig.RuntimeSocket = nodeConfig.Containerd.Address
|
|
} else {
|
|
nodeConfig.AgentConfig.RuntimeSocket = nodeConfig.ContainerRuntimeEndpoint
|
|
}
|
|
|
|
if controlConfig.ClusterIPRange != nil {
|
|
nodeConfig.AgentConfig.ClusterCIDR = controlConfig.ClusterIPRange
|
|
nodeConfig.AgentConfig.ClusterCIDRs = []*net.IPNet{controlConfig.ClusterIPRange}
|
|
}
|
|
|
|
if len(controlConfig.ClusterIPRanges) > 0 {
|
|
nodeConfig.AgentConfig.ClusterCIDRs = controlConfig.ClusterIPRanges
|
|
}
|
|
|
|
if controlConfig.ServiceIPRange != nil {
|
|
nodeConfig.AgentConfig.ServiceCIDR = controlConfig.ServiceIPRange
|
|
nodeConfig.AgentConfig.ServiceCIDRs = []*net.IPNet{controlConfig.ServiceIPRange}
|
|
}
|
|
|
|
if len(controlConfig.ServiceIPRanges) > 0 {
|
|
nodeConfig.AgentConfig.ServiceCIDRs = controlConfig.ServiceIPRanges
|
|
}
|
|
|
|
if controlConfig.ServiceNodePortRange != nil {
|
|
nodeConfig.AgentConfig.ServiceNodePortRange = *controlConfig.ServiceNodePortRange
|
|
}
|
|
|
|
if len(controlConfig.ClusterDNSs) == 0 {
|
|
nodeConfig.AgentConfig.ClusterDNSs = []net.IP{controlConfig.ClusterDNS}
|
|
} else {
|
|
nodeConfig.AgentConfig.ClusterDNSs = controlConfig.ClusterDNSs
|
|
}
|
|
|
|
nodeConfig.AgentConfig.PauseImage = envInfo.PauseImage
|
|
nodeConfig.AgentConfig.AirgapExtraRegistry = envInfo.AirgapExtraRegistry
|
|
nodeConfig.AgentConfig.SystemDefaultRegistry = controlConfig.SystemDefaultRegistry
|
|
|
|
// Apply SystemDefaultRegistry to PauseImage and AirgapExtraRegistry
|
|
if controlConfig.SystemDefaultRegistry != "" {
|
|
if nodeConfig.AgentConfig.PauseImage != "" && !strings.HasPrefix(nodeConfig.AgentConfig.PauseImage, controlConfig.SystemDefaultRegistry) {
|
|
nodeConfig.AgentConfig.PauseImage = controlConfig.SystemDefaultRegistry + "/" + nodeConfig.AgentConfig.PauseImage
|
|
}
|
|
if !slice.ContainsString(nodeConfig.AgentConfig.AirgapExtraRegistry, controlConfig.SystemDefaultRegistry) {
|
|
nodeConfig.AgentConfig.AirgapExtraRegistry = append(nodeConfig.AgentConfig.AirgapExtraRegistry, controlConfig.SystemDefaultRegistry)
|
|
}
|
|
}
|
|
|
|
nodeConfig.AgentConfig.ExtraKubeletArgs = envInfo.ExtraKubeletArgs
|
|
nodeConfig.AgentConfig.ExtraKubeProxyArgs = envInfo.ExtraKubeProxyArgs
|
|
nodeConfig.AgentConfig.NodeTaints = envInfo.Taints
|
|
nodeConfig.AgentConfig.NodeLabels = envInfo.Labels
|
|
nodeConfig.AgentConfig.ImageCredProvBinDir = envInfo.ImageCredProvBinDir
|
|
nodeConfig.AgentConfig.ImageCredProvConfig = envInfo.ImageCredProvConfig
|
|
nodeConfig.AgentConfig.PrivateRegistry = envInfo.PrivateRegistry
|
|
nodeConfig.AgentConfig.DisableCCM = controlConfig.DisableCCM
|
|
nodeConfig.AgentConfig.DisableNPC = controlConfig.DisableNPC
|
|
nodeConfig.AgentConfig.Rootless = envInfo.Rootless
|
|
nodeConfig.AgentConfig.PodManifests = filepath.Join(envInfo.DataDir, "agent", DefaultPodManifestPath)
|
|
nodeConfig.AgentConfig.ProtectKernelDefaults = envInfo.ProtectKernelDefaults
|
|
nodeConfig.AgentConfig.DisableServiceLB = envInfo.DisableServiceLB
|
|
|
|
if err := validateNetworkConfig(nodeConfig); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return nodeConfig, nil
|
|
}
|
|
|
|
// getAPIServers attempts to return a list of apiservers from the server.
|
|
func getAPIServers(ctx context.Context, node *config.Node, proxy proxy.Proxy) ([]string, error) {
|
|
withCert := clientaccess.WithClientCertificate(node.AgentConfig.ClientKubeletCert, node.AgentConfig.ClientKubeletKey)
|
|
info, err := clientaccess.ParseAndValidateToken(proxy.SupervisorURL(), node.Token, withCert)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
data, err := info.Get("/v1-" + version.Program + "/apiservers")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
endpoints := []string{}
|
|
return endpoints, json.Unmarshal(data, &endpoints)
|
|
}
|
|
|
|
// getKubeProxyDisabled attempts to return the DisableKubeProxy setting from the server configuration data.
|
|
// It first checks the server readyz endpoint, to ensure that the configuration has stabilized before use.
|
|
func getKubeProxyDisabled(ctx context.Context, node *config.Node, proxy proxy.Proxy) (bool, error) {
|
|
withCert := clientaccess.WithClientCertificate(node.AgentConfig.ClientKubeletCert, node.AgentConfig.ClientKubeletKey)
|
|
info, err := clientaccess.ParseAndValidateToken(proxy.SupervisorURL(), node.Token, withCert)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
// 500 error indicates that the health check has failed; other errors (for example 401 Unauthorized)
|
|
// indicate that the server is down-level and doesn't support readyz, so we should just use whatever
|
|
// the server has for us.
|
|
if err := getReadyz(info); err != nil && strings.HasSuffix(err.Error(), "500 Internal Server Error") {
|
|
return false, err
|
|
}
|
|
|
|
controlConfig, err := getConfig(info)
|
|
if err != nil {
|
|
return false, errors.Wrap(err, "failed to retrieve configuration from server")
|
|
}
|
|
|
|
return controlConfig.DisableKubeProxy, nil
|
|
}
|
|
|
|
// getConfig returns server configuration data. Note that this may be mutated during system startup; anything that needs
|
|
// to ensure stable system state should check the readyz endpoint first. This is required because RKE2 starts up the
|
|
// kubelet early, before the apiserver is available.
|
|
func getConfig(info *clientaccess.Info) (*config.Control, error) {
|
|
data, err := info.Get("/v1-" + version.Program + "/config")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
controlControl := &config.Control{}
|
|
return controlControl, json.Unmarshal(data, controlControl)
|
|
}
|
|
|
|
// getReadyz returns nil if the server is ready, or an error if not.
|
|
func getReadyz(info *clientaccess.Info) error {
|
|
_, err := info.Get("/v1-" + version.Program + "/readyz")
|
|
return err
|
|
}
|
|
|
|
// validateNetworkConfig ensures that the network configuration values provided by the server make sense.
|
|
func validateNetworkConfig(nodeConfig *config.Node) error {
|
|
// Old versions of the server do not send enough information to correctly start the NPC. Users
|
|
// need to upgrade the server to at least the same version as the agent, or disable the NPC
|
|
// cluster-wide.
|
|
if nodeConfig.AgentConfig.DisableNPC == false && (nodeConfig.AgentConfig.ServiceCIDR == nil || nodeConfig.AgentConfig.ServiceNodePortRange.Size == 0) {
|
|
return fmt.Errorf("incompatible down-level server detected; servers must be upgraded to at least %s, or restarted with --disable-network-policy", version.Version)
|
|
}
|
|
|
|
return nil
|
|
}
|