mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
123 lines
2.9 KiB
Go
123 lines
2.9 KiB
Go
package nodeconfig
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import (
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"crypto/sha256"
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"encoding/base32"
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"encoding/json"
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"fmt"
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"os"
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"strings"
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"github.com/pkg/errors"
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"github.com/rancher/k3s/pkg/configfilearg"
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"github.com/rancher/k3s/pkg/version"
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corev1 "k8s.io/api/core/v1"
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)
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var (
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NodeArgsAnnotation = version.Program + ".io/node-args"
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NodeEnvAnnotation = version.Program + ".io/node-env"
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NodeConfigHashAnnotation = version.Program + ".io/node-config-hash"
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)
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const (
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OmittedValue = "********"
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)
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func getNodeArgs() (string, error) {
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nodeArgsList := []string{}
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for _, arg := range configfilearg.MustParse(os.Args[1:]) {
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if strings.HasPrefix(arg, "--") && strings.Contains(arg, "=") {
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parsedArg := strings.SplitN(arg, "=", 2)
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nodeArgsList = append(nodeArgsList, parsedArg...)
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continue
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}
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nodeArgsList = append(nodeArgsList, arg)
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}
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for i, arg := range nodeArgsList {
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if isSecret(arg) {
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if i+1 < len(nodeArgsList) {
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nodeArgsList[i+1] = OmittedValue
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}
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}
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}
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nodeArgs, err := json.Marshal(nodeArgsList)
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if err != nil {
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return "", errors.Wrap(err, "Failed to retrieve argument list for node")
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}
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return string(nodeArgs), nil
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}
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func getNodeEnv() (string, error) {
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k3sEnv := make(map[string]string)
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for _, v := range os.Environ() {
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keyValue := strings.SplitN(v, "=", 2)
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if strings.HasPrefix(keyValue[0], version.ProgramUpper+"_") {
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k3sEnv[keyValue[0]] = keyValue[1]
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}
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}
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for key := range k3sEnv {
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if isSecret(key) {
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k3sEnv[key] = OmittedValue
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}
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}
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k3sEnvJSON, err := json.Marshal(k3sEnv)
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if err != nil {
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return "", errors.Wrap(err, "Failed to retrieve environment map for node")
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}
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return string(k3sEnvJSON), nil
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}
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func SetNodeConfigAnnotations(node *corev1.Node) (bool, error) {
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nodeArgs, err := getNodeArgs()
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if err != nil {
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return false, err
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}
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nodeEnv, err := getNodeEnv()
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if err != nil {
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return false, err
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}
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h := sha256.New()
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_, err = h.Write([]byte(nodeArgs + nodeEnv))
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if err != nil {
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return false, fmt.Errorf("Failed to hash the node config: %v", err)
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}
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if node.Annotations == nil {
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node.Annotations = make(map[string]string)
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}
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configHash := h.Sum(nil)
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encoded := base32.StdEncoding.EncodeToString(configHash[:])
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if node.Annotations[NodeConfigHashAnnotation] == encoded {
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return false, nil
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}
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node.Annotations[NodeEnvAnnotation] = nodeEnv
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node.Annotations[NodeArgsAnnotation] = nodeArgs
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node.Annotations[NodeConfigHashAnnotation] = encoded
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return true, nil
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}
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func isSecret(key string) bool {
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secretData := []string{
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version.ProgramUpper + "_TOKEN",
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version.ProgramUpper + "_DATASTORE_ENDPOINT",
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version.ProgramUpper + "_AGENT_TOKEN",
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version.ProgramUpper + "_CLUSTER_SECRET",
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"AWS_ACCESS_KEY_ID",
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"AWS_SECRET_ACCESS_KEY",
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"--token",
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"-t",
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"--agent-token",
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"--datastore-endpoint",
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"--cluster-secret",
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"--etcd-s3-access-key",
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"--etcd-s3-secret-key",
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}
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for _, secret := range secretData {
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if key == secret {
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return true
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}
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}
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return false
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}
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