mirror of https://github.com/status-im/consul.git
Merge pull request #8463 from hashicorp/dnephin/unmethod-make-node-id
agent: convert NodeID methods to functions
This commit is contained in:
Daniel Nephin
parent
533c53b8ef
commit
298c4d7e66
124
agent/agent.go
124
agent/agent.go
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@ -2,7 +2,6 @@ package agent
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import (
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"context"
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"crypto/sha512"
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"crypto/tls"
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"encoding/json"
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"fmt"
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@ -52,11 +51,9 @@ import (
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"github.com/hashicorp/consul/tlsutil"
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"github.com/hashicorp/consul/types"
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"github.com/hashicorp/go-multierror"
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"github.com/hashicorp/go-uuid"
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"github.com/hashicorp/memberlist"
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"github.com/hashicorp/raft"
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"github.com/hashicorp/serf/serf"
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"github.com/shirou/gopsutil/host"
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"golang.org/x/net/http2"
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)
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@ -514,8 +511,9 @@ func New(options ...AgentOption) (*Agent, error) {
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// Retrieve or generate the node ID before setting up the rest of the
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// agent, which depends on it.
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if err := a.setupNodeID(a.config); err != nil {
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return nil, fmt.Errorf("Failed to setup node ID: %v", err)
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cfg.NodeID, err = newNodeIDFromConfig(a.config, a.logger)
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if err != nil {
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return nil, fmt.Errorf("failed to setup node ID: %w", err)
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}
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// We used to do this in the Start method. However it doesn't need to go
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@ -1557,122 +1555,6 @@ func (a *Agent) segmentConfig() ([]consul.NetworkSegment, error) {
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return segments, nil
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}
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// makeRandomID will generate a random UUID for a node.
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func (a *Agent) makeRandomID() (string, error) {
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id, err := uuid.GenerateUUID()
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if err != nil {
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return "", err
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}
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a.logger.Debug("Using random ID as node ID", "id", id)
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return id, nil
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}
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// makeNodeID will try to find a host-specific ID, or else will generate a
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// random ID. The returned ID will always be formatted as a GUID. We don't tell
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// the caller whether this ID is random or stable since the consequences are
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// high for us if this changes, so we will persist it either way. This will let
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// gopsutil change implementations without affecting in-place upgrades of nodes.
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func (a *Agent) makeNodeID() (string, error) {
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// If they've disabled host-based IDs then just make a random one.
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if a.config.DisableHostNodeID {
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return a.makeRandomID()
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}
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// Try to get a stable ID associated with the host itself.
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info, err := host.Info()
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if err != nil {
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a.logger.Debug("Couldn't get a unique ID from the host", "error", err)
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return a.makeRandomID()
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}
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// Make sure the host ID parses as a UUID, since we don't have complete
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// control over this process.
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id := strings.ToLower(info.HostID)
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if _, err := uuid.ParseUUID(id); err != nil {
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a.logger.Debug("Unique ID from host isn't formatted as a UUID",
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"id", id,
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"error", err,
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)
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return a.makeRandomID()
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}
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// Hash the input to make it well distributed. The reported Host UUID may be
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// similar across nodes if they are on a cloud provider or on motherboards
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// created from the same batch.
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buf := sha512.Sum512([]byte(id))
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id = fmt.Sprintf("%08x-%04x-%04x-%04x-%12x",
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buf[0:4],
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buf[4:6],
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buf[6:8],
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buf[8:10],
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buf[10:16])
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a.logger.Debug("Using unique ID from host as node ID", "id", id)
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return id, nil
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}
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// setupNodeID will pull the persisted node ID, if any, or create a random one
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// and persist it.
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func (a *Agent) setupNodeID(config *config.RuntimeConfig) error {
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// If they've configured a node ID manually then just use that, as
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// long as it's valid.
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if config.NodeID != "" {
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config.NodeID = types.NodeID(strings.ToLower(string(config.NodeID)))
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if _, err := uuid.ParseUUID(string(config.NodeID)); 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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// For dev mode we have no filesystem access so just make one.
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if a.config.DataDir == "" {
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id, err := a.makeNodeID()
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if err != nil {
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return err
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}
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config.NodeID = types.NodeID(id)
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return nil
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}
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// Load saved state, if any. Since a user could edit this, we also
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// validate it.
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fileID := filepath.Join(config.DataDir, "node-id")
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if _, err := os.Stat(fileID); err == nil {
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rawID, err := ioutil.ReadFile(fileID)
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if err != nil {
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return err
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}
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nodeID := strings.TrimSpace(string(rawID))
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nodeID = strings.ToLower(nodeID)
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if _, err := uuid.ParseUUID(nodeID); err != nil {
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return err
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}
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config.NodeID = types.NodeID(nodeID)
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}
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// If we still don't have a valid node ID, make one.
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if config.NodeID == "" {
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id, err := a.makeNodeID()
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if err != nil {
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return err
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}
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if err := lib.EnsurePath(fileID, false); err != nil {
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return err
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}
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if err := ioutil.WriteFile(fileID, []byte(id), 0600); err != nil {
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return err
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}
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config.NodeID = types.NodeID(id)
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}
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return nil
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}
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// setupBaseKeyrings configures the LAN and WAN keyrings.
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func (a *Agent) setupBaseKeyrings(config *consul.Config) error {
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// If the keyring file is disabled then just poke the provided key
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@ -38,7 +38,6 @@ import (
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"github.com/hashicorp/consul/sdk/testutil/retry"
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"github.com/hashicorp/consul/testrpc"
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"github.com/hashicorp/consul/types"
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"github.com/hashicorp/go-uuid"
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"github.com/hashicorp/serf/serf"
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"github.com/pascaldekloe/goe/verify"
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"github.com/stretchr/testify/assert"
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@ -251,120 +250,6 @@ func TestAgent_ReconnectConfigWanDisabled(t *testing.T) {
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require.Nil(t, a.consulConfig().SerfWANConfig)
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}
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func TestAgent_setupNodeID(t *testing.T) {
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t.Parallel()
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a := NewTestAgent(t, `
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node_id = ""
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`)
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defer a.Shutdown()
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cfg := a.config
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// The auto-assigned ID should be valid.
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id := a.consulConfig().NodeID
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if _, err := uuid.ParseUUID(string(id)); err != nil {
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t.Fatalf("err: %v", err)
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}
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// Running again should get the same ID (persisted in the file).
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cfg.NodeID = ""
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if err := a.setupNodeID(cfg); err != nil {
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t.Fatalf("err: %v", err)
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}
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if newID := a.consulConfig().NodeID; id != newID {
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t.Fatalf("bad: %q vs %q", id, newID)
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}
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// Set an invalid ID via.Config.
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cfg.NodeID = types.NodeID("nope")
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err := a.setupNodeID(cfg)
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if err == nil || !strings.Contains(err.Error(), "uuid string is wrong length") {
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t.Fatalf("err: %v", err)
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}
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// Set a valid ID via.Config.
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newID, err := uuid.GenerateUUID()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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cfg.NodeID = types.NodeID(strings.ToUpper(newID))
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if err := a.setupNodeID(cfg); err != nil {
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t.Fatalf("err: %v", err)
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}
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if id := a.consulConfig().NodeID; string(id) != newID {
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t.Fatalf("bad: %q vs. %q", id, newID)
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}
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// Set an invalid ID via the file.
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fileID := filepath.Join(cfg.DataDir, "node-id")
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if err := ioutil.WriteFile(fileID, []byte("adf4238a!882b!9ddc!4a9d!5b6758e4159e"), 0600); err != nil {
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t.Fatalf("err: %v", err)
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}
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cfg.NodeID = ""
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err = a.setupNodeID(cfg)
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if err == nil || !strings.Contains(err.Error(), "uuid is improperly formatted") {
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t.Fatalf("err: %v", err)
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}
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// Set a valid ID via the file.
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if err := ioutil.WriteFile(fileID, []byte("ADF4238a-882b-9ddc-4a9d-5b6758e4159e"), 0600); err != nil {
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t.Fatalf("err: %v", err)
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}
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cfg.NodeID = ""
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if err := a.setupNodeID(cfg); err != nil {
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t.Fatalf("err: %v", err)
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}
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if id := a.consulConfig().NodeID; string(id) != "adf4238a-882b-9ddc-4a9d-5b6758e4159e" {
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t.Fatalf("bad: %q vs. %q", id, newID)
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}
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}
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func TestAgent_makeNodeID(t *testing.T) {
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t.Parallel()
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a := NewTestAgent(t, `
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node_id = ""
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`)
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defer a.Shutdown()
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// We should get a valid host-based ID initially.
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id, err := a.makeNodeID()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if _, err := uuid.ParseUUID(id); err != nil {
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t.Fatalf("err: %v", err)
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}
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// Calling again should yield a random ID by default.
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another, err := a.makeNodeID()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if id == another {
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t.Fatalf("bad: %s vs %s", id, another)
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}
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// Turn on host-based IDs and try again. We should get the same ID
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// each time (and a different one from the random one above).
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a.GetConfig().DisableHostNodeID = false
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id, err = a.makeNodeID()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if id == another {
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t.Fatalf("bad: %s vs %s", id, another)
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}
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// Calling again should yield the host-based ID.
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another, err = a.makeNodeID()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if id != another {
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t.Fatalf("bad: %s vs %s", id, another)
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}
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}
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func TestAgent_AddService(t *testing.T) {
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t.Run("normal", func(t *testing.T) {
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t.Parallel()
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@ -0,0 +1,95 @@
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package agent
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import (
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"crypto/sha512"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/hashicorp/consul/agent/config"
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"github.com/hashicorp/consul/lib"
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"github.com/hashicorp/consul/types"
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"github.com/hashicorp/go-hclog"
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"github.com/hashicorp/go-uuid"
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"github.com/shirou/gopsutil/host"
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)
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// newNodeIDFromConfig will pull the persisted node ID, if any, or create a random one
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// and persist it.
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func newNodeIDFromConfig(config *config.RuntimeConfig, logger hclog.Logger) (types.NodeID, error) {
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if config.NodeID != "" {
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nodeID := strings.ToLower(string(config.NodeID))
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if _, err := uuid.ParseUUID(nodeID); err != nil {
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return "", fmt.Errorf("specified NodeID is invalid: %w", err)
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}
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return types.NodeID(nodeID), nil
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}
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// For dev mode we have no filesystem access so just make one.
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if config.DataDir == "" {
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id, err := makeNodeID(logger, config.DisableHostNodeID)
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return types.NodeID(id), err
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}
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// Load saved state, if any. Since a user could edit this, we also validate it.
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filename := filepath.Join(config.DataDir, "node-id")
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if _, err := os.Stat(filename); err == nil {
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rawID, err := ioutil.ReadFile(filename)
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if err != nil {
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return "", err
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}
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nodeID := strings.TrimSpace(string(rawID))
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nodeID = strings.ToLower(nodeID)
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if _, err = uuid.ParseUUID(nodeID); err != nil {
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return "", fmt.Errorf("NodeID in %s is invalid: %w", filename, err)
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}
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return types.NodeID(nodeID), nil
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}
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id, err := makeNodeID(logger, config.DisableHostNodeID)
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if err != nil {
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return "", fmt.Errorf("failed to create a NodeID: %w", err)
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}
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if err := lib.EnsurePath(filename, false); err != nil {
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return "", err
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}
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if err := ioutil.WriteFile(filename, []byte(id), 0600); err != nil {
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return "", fmt.Errorf("failed to write NodeID to disk: %w", err)
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}
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return types.NodeID(id), nil
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}
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// makeNodeID will try to find a host-specific ID, or else will generate a
|
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// random ID. The returned ID will always be formatted as a GUID. We don't tell
|
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// the caller whether this ID is random or stable since the consequences are
|
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// high for us if this changes, so we will persist it either way. This will let
|
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// gopsutil change implementations without affecting in-place upgrades of nodes.
|
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func makeNodeID(logger hclog.Logger, disableHostNodeID bool) (string, error) {
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if disableHostNodeID {
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return uuid.GenerateUUID()
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}
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// Try to get a stable ID associated with the host itself.
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info, err := host.Info()
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if err != nil {
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logger.Debug("Couldn't get a unique ID from the host", "error", err)
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return uuid.GenerateUUID()
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}
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|
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// Hash the input to make it well distributed. The reported Host UUID may be
|
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// similar across nodes if they are on a cloud provider or on motherboards
|
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// created from the same batch.
|
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buf := sha512.Sum512([]byte(strings.ToLower(info.HostID)))
|
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id := fmt.Sprintf("%08x-%04x-%04x-%04x-%12x",
|
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buf[0:4],
|
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buf[4:6],
|
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buf[6:8],
|
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buf[8:10],
|
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buf[10:16])
|
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|
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logger.Debug("Using unique ID from host as node ID", "id", id)
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return id, nil
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}
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@ -0,0 +1,112 @@
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package agent
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
|
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"strings"
|
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"testing"
|
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|
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"github.com/hashicorp/consul/agent/config"
|
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"github.com/hashicorp/consul/sdk/testutil"
|
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"github.com/hashicorp/consul/types"
|
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"github.com/hashicorp/go-hclog"
|
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"github.com/hashicorp/go-uuid"
|
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"github.com/stretchr/testify/require"
|
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)
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func TestNewNodeIDFromConfig(t *testing.T) {
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logger := hclog.New(nil)
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tmpDir := testutil.TempDir(t, "")
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t.Cleanup(func() {
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os.RemoveAll(tmpDir)
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})
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cfg := &config.RuntimeConfig{
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DataDir: tmpDir,
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}
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var randomNodeID types.NodeID
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t.Run("a new ID is generated when none is specified", func(t *testing.T) {
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var err error
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randomNodeID, err = newNodeIDFromConfig(cfg, logger)
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require.NoError(t, err)
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_, err = uuid.ParseUUID(string(randomNodeID))
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require.NoError(t, err)
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})
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t.Run("running again should get the NodeID that was persisted to disk", func(t *testing.T) {
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nodeID, err := newNodeIDFromConfig(cfg, logger)
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require.NoError(t, err)
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require.NotEqual(t, nodeID, "")
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require.Equal(t, nodeID, randomNodeID)
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})
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t.Run("invalid NodeID in config", func(t *testing.T) {
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cfg.NodeID = "nope"
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_, err := newNodeIDFromConfig(cfg, logger)
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require.Error(t, err)
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require.Contains(t, err.Error(), "specified NodeID is invalid")
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})
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t.Run("valid NodeID in config", func(t *testing.T) {
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newID, err := uuid.GenerateUUID()
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require.NoError(t, err)
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cfg.NodeID = types.NodeID(strings.ToUpper(newID))
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nodeID, err := newNodeIDFromConfig(cfg, logger)
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require.NoError(t, err)
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require.Equal(t, string(nodeID), newID)
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})
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t.Run("invalid NodeID in file", func(t *testing.T) {
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cfg.NodeID = ""
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filename := filepath.Join(cfg.DataDir, "node-id")
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err := ioutil.WriteFile(filename, []byte("adf4238a!882b!9ddc!4a9d!5b6758e4159e"), 0600)
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require.NoError(t, err)
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_, err = newNodeIDFromConfig(cfg, logger)
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require.Error(t, err)
|
||||
require.Contains(t, err.Error(), fmt.Sprintf("NodeID in %s is invalid", filename))
|
||||
})
|
||||
|
||||
t.Run("valid NodeID in file", func(t *testing.T) {
|
||||
cfg.NodeID = ""
|
||||
filename := filepath.Join(cfg.DataDir, "node-id")
|
||||
err := ioutil.WriteFile(filename, []byte("ADF4238a-882b-9ddc-4a9d-5b6758e4159e"), 0600)
|
||||
require.NoError(t, err)
|
||||
|
||||
nodeID, err := newNodeIDFromConfig(cfg, logger)
|
||||
require.NoError(t, err)
|
||||
require.Equal(t, string(nodeID), "adf4238a-882b-9ddc-4a9d-5b6758e4159e")
|
||||
})
|
||||
}
|
||||
|
||||
func TestMakeNodeID(t *testing.T) {
|
||||
logger := hclog.New(nil)
|
||||
|
||||
var randomID string
|
||||
t.Run("Random ID when HostNodeID is disabled", func(t *testing.T) {
|
||||
var err error
|
||||
randomID, err = makeNodeID(logger, true)
|
||||
require.NoError(t, err)
|
||||
|
||||
_, err = uuid.ParseUUID(randomID)
|
||||
require.NoError(t, err)
|
||||
|
||||
another, err := makeNodeID(logger, true)
|
||||
require.NoError(t, err)
|
||||
require.NotEqual(t, randomID, another)
|
||||
})
|
||||
|
||||
t.Run("host-based ID when HostNodeID is enabled", func(t *testing.T) {
|
||||
id, err := makeNodeID(logger, false)
|
||||
require.NoError(t, err)
|
||||
require.NotEqual(t, randomID, id)
|
||||
|
||||
another, err := makeNodeID(logger, false)
|
||||
require.NoError(t, err)
|
||||
require.Equal(t, id, another)
|
||||
})
|
||||
}
|
||||
Loading…
Reference in New Issue