forked from etcd-io/etcd
/
initial-cluster_test.go
226 lines (213 loc) · 6.94 KB
/
initial-cluster_test.go
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package discover_etcd_initial_cluster
import (
"bytes"
"context"
"fmt"
"go.etcd.io/etcd/integration"
"go.etcd.io/etcd/pkg/transport"
"io"
"log"
"net"
"net/url"
"os"
"reflect"
"sort"
"strings"
"testing"
)
var testTLSInfo = transport.TLSInfo{
KeyFile: "../../../integration/fixtures/server.key.insecure",
CertFile: "../../../integration/fixtures/server.crt",
TrustedCAFile: "../../../integration/fixtures/ca.crt",
ClientCertAuth: true,
}
var (
targetHostNotFound = "[::]"
emptyInitialCluster = []string{""}
invalidEndpoint = []string{"http://127.0.0.1:1234"}
allActiveEndpoints []string
unstartedMemberHost = "0.0.0.0"
unstartedMemberName = "unstarted-member"
noDataDir = ""
)
func TestDiscoverInitialCluster(t *testing.T) {
clus := integration.NewClusterV3(t, &integration.ClusterConfig{
Size: 3,
PeerTLS: &testTLSInfo,
ClientTLS: &testTLSInfo,
SkipCreatingClient: false,
})
defer clus.Terminate(t)
// second cluster is setup just to destroy the dataDir in destructive test.
clus2 := integration.NewClusterV3(t, &integration.ClusterConfig{
Size: 1,
SkipCreatingClient: true,
})
defer clus2.Terminate(t)
allActiveEndpoints = []string{clus.Members[0].GRPCAddr(), clus.Members[1].GRPCAddr(), clus.Members[2].GRPCAddr()}
target, err := url.Parse(clus.Members[0].PeerURLs.String())
if err != nil {
t.Fatal(err)
}
targetHost, targetPort, err := net.SplitHostPort(target.Host)
if err != nil {
t.Fatal(err)
}
client := clus.RandClient()
// add unstarted member
if _, err := client.MemberAdd(context.TODO(), []string{fmt.Sprintf("unixs://0.0.0.0:%s", targetPort)}); err != nil {
t.Fatal(err)
}
cluster, err := client.MemberList(context.TODO())
if err != nil {
t.Fatal(err)
}
var wantInitialCluster []string
for _, member := range cluster.Members {
// generate initial cluster <name>=<peerURL>
var memberName string
if member.Name == "" {
memberName = "unstarted-member"
} else {
memberName = member.Name
}
wantInitialCluster = append(wantInitialCluster, fmt.Sprintf("%s=%s", memberName, member.PeerURLs[0]))
}
tests := map[string]struct {
targetName string
targetHost string
endpoints []string
dataDir string
wantInitialCluster []string
wantErr bool
wantErrString string
}{
"started member found no dataDir": {
targetName: clus.Members[0].Name,
targetHost: targetHost,
endpoints: allActiveEndpoints,
dataDir: noDataDir,
wantInitialCluster: emptyInitialCluster,
wantErr: true,
wantErrString: fmt.Sprintf("member \"unixs://127.0.0.1:%s\" dataDir has been destroyed and must be removed from the cluster", targetPort),
},
"started member found with dataDir": {
targetName: clus.Members[0].Name,
targetHost: targetHost,
endpoints: allActiveEndpoints,
dataDir: clus.Members[0].DataDir,
wantInitialCluster: emptyInitialCluster,
},
"create client fail no dataDir": {
targetName: clus.Members[0].Name,
targetHost: targetHost,
endpoints: invalidEndpoint,
dataDir: noDataDir,
wantInitialCluster: emptyInitialCluster,
wantErr: true,
wantErrString: "failed to create etcd client: context deadline exceeded",
},
"create client fail with dataDir": {
targetName: clus.Members[0].Name,
targetHost: targetHost,
endpoints: invalidEndpoint,
dataDir: clus.Members[0].DataDir,
wantInitialCluster: emptyInitialCluster,
wantErr: false,
},
"member not found with dataDir": {
targetName: "not-a-member",
targetHost: targetHostNotFound,
endpoints: allActiveEndpoints,
dataDir: clus.Members[0].DataDir,
wantInitialCluster: emptyInitialCluster,
wantErr: true,
wantErrString: "timed out",
},
"member not found no dataDir": {
targetName: "not-a-member",
targetHost: targetHostNotFound,
endpoints: allActiveEndpoints,
dataDir: noDataDir,
wantInitialCluster: emptyInitialCluster,
wantErr: true,
wantErrString: "timed out",
},
"unstarted member found with dataDir": { //destructive
targetName: unstartedMemberName,
targetHost: unstartedMemberHost,
endpoints: allActiveEndpoints,
dataDir: clus2.Members[0].DataDir,
wantInitialCluster: emptyInitialCluster,
wantErr: true,
wantErrString: fmt.Sprintf("member \"unixs://%s:%s\" is unstarted but previous members dataDir exists: archiving to \"/tmp-removed-archive\"", unstartedMemberHost, targetPort),
},
"unstarted member found no dataDir": {
targetName: unstartedMemberName,
targetHost: unstartedMemberHost,
endpoints: allActiveEndpoints,
dataDir: noDataDir,
wantInitialCluster: wantInitialCluster,
wantErr: false,
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
o := DiscoverEtcdInitialClusterOptions{
TargetPeerURLHost: test.targetHost,
TargetPeerURLScheme: "unixs",
TargetPeerURLPort: targetPort,
TargetName: test.targetName,
CABundleFile: testTLSInfo.TrustedCAFile,
ClientCertFile: testTLSInfo.CertFile,
ClientKeyFile: testTLSInfo.KeyFile,
Endpoints: test.endpoints,
DataDir: test.dataDir,
}
if err := checkInitialClusterOutput(o, test.wantInitialCluster, test.wantErr, test.wantErrString); err != nil {
t.Error(err)
}
})
}
}
func checkInitialClusterOutput(o DiscoverEtcdInitialClusterOptions, wantInitialCluster []string, wantErr bool, wantErrString string) error {
// capture stdout
r, w, err := os.Pipe()
if err != nil {
log.Fatal(err)
}
stdout := os.Stdout
os.Stdout = w
defer func() {
os.Stdout = stdout
}()
o.Validate()
// check for expected errors
outErr := o.Run()
if outErr != nil && !wantErr {
return fmt.Errorf("unexpected error %v", outErr)
}
if outErr == nil && wantErr {
return fmt.Errorf("expected error")
}
// validate error string is as expected
if wantErr && wantErrString != outErr.Error() {
return fmt.Errorf("expected error: %q got: %q", wantErrString, outErr)
}
w.Close()
var out bytes.Buffer
io.Copy(&out, r)
// validate output
gotInitialCluster := strings.Split(out.String(), ",")
// etcd will fail if we print a value that is not in a <key>=<value> format
if len(gotInitialCluster) == 1 && len(gotInitialCluster[0]) > 0 {
return fmt.Errorf("expected <key>=<value> pairs got: %q", gotInitialCluster)
}
// not concerned about order for this test
sort.Strings(gotInitialCluster)
sort.Strings(wantInitialCluster)
if !reflect.DeepEqual(gotInitialCluster, wantInitialCluster) {
return fmt.Errorf("expected: %q got: %q", wantInitialCluster, gotInitialCluster)
}
return nil
}