Failed to install Dgraph. Got "Error while dialing dial tcp: lookup dgraph-zero-0.dgraph-zero.hm.svc.cluster.local: no such host"
I am trying to install Dgraph. Here is what I did:
I created a dev cluster by k3d by
k3d cluster create dev --config=dev-cluster-config.yaml
dev-cluster-config.yaml file:
apiVersion: k3d.io/v1alpha2
kind: Simple
kubeAPI:
hostPort: "6440"
network: hm-network
ports:
- port: 40000:80
nodeFilters:
- loadbalancer
options:
k3s:
extraServerArgs:
- --no-deploy=traefik
- --cluster-domain=dev.k8s-hongbomiao.com
I installed Dgraph by
kubectl create namespace hm
kubectl apply --namespace=hm --filename=https://raw.githubusercontent.com/dgraph-io/dgraph/master/contrib/config/kubernetes/dgraph-ha/dgraph-ha.yaml
As you see my dgraph-alpha-0 has issue.
Here is my dgraph-alpha-0 log:
++ hostname -f
+ dgraph alpha --my=dgraph-alpha-0.dgraph-alpha.hm.svc.dev.k8s-hongbomiao.com:7080 --zero dgraph-zero-0.dgraph-zero.hm.svc.cluster.local:5080,dgraph-zero-1.dgraph-zero.hm.svc.cluster.local:5080,dgraph-zero-2.dgraph-zero.hm.svc.cluster.local:5080
[Sentry] 2021/08/05 19:16:15 Integration installed: ContextifyFrames
[Sentry] 2021/08/05 19:16:15 Integration installed: Environment
[Sentry] 2021/08/05 19:16:15 Integration installed: Modules
[Sentry] 2021/08/05 19:16:15 Integration installed: IgnoreErrors
[Sentry] 2021/08/05 19:16:16 Integration installed: ContextifyFrames
[Sentry] 2021/08/05 19:16:16 Integration installed: Environment
[Sentry] 2021/08/05 19:16:16 Integration installed: Modules
[Sentry] 2021/08/05 19:16:16 Integration installed: IgnoreErrors
I0805 19:16:16.205382 19 sentry_integration.go:48] This instance of Dgraph will send anonymous reports of panics back to Dgraph Labs via Sentry. No confidential information is sent. These reports help improve Dgraph. To opt-out, restart your instance with the --telemetry "sentry=false;" flag. For more info, see https://dgraph.io/docs/howto/#data-handling.
I0805 19:16:16.396706 19 init.go:110]
Dgraph version : v21.03.1
Dgraph codename : rocket-1
Dgraph SHA-256 : a00b73d583a720aa787171e43b4cb4dbbf75b38e522f66c9943ab2f0263007fe
Commit SHA-1 : ea1cb5f35
Commit timestamp : 2021-06-17 20:38:11 +0530
Branch : HEAD
Go version : go1.16.2
jemalloc enabled : true
For Dgraph official documentation, visit https://dgraph.io/docs.
For discussions about Dgraph , visit https://discuss.dgraph.io.
For fully-managed Dgraph Cloud , visit https://dgraph.io/cloud.
Licensed variously under the Apache Public License 2.0 and Dgraph Community License.
Copyright 2015-2021 Dgraph Labs, Inc.
I0805 19:16:16.396764 19 run.go:752] x.Config: {PortOffset:0 Limit:disallow-drop=false; txn-abort-after=5m; max-pending-queries=10000; query-edge=1000000; mutations-nquad=1000000; query-timeout=0ms; max-retries=-1; mutations=allow; normalize-node=10000 LimitMutationsNquad:1000000 LimitQueryEdge:1000000 BlockClusterWideDrop:false LimitNormalizeNode:10000 QueryTimeout:0s MaxRetries:-1 GraphQL:introspection=true; debug=false; extensions=true; poll-interval=1s; lambda-url= GraphQLDebug:false}
I0805 19:16:16.396828 19 run.go:753] x.WorkerConfig: {TmpDir:t ExportPath:export Trace:ratio=0.01; jaeger=; datadog= MyAddr:dgraph-alpha-0.dgraph-alpha.hm.svc.dev.k8s-hongbomiao.com:7080 ZeroAddr:[dgraph-zero-0.dgraph-zero.hm.svc.cluster.local:5080 dgraph-zero-1.dgraph-zero.hm.svc.cluster.local:5080 dgraph-zero-2.dgraph-zero.hm.svc.cluster.local:5080] TLSClientConfig:<nil> TLSServerConfig:<nil> Raft:learner=false; snapshot-after-entries=10000; snapshot-after-duration=30m; pending-proposals=256; idx=; group= Badger:{Dir: ValueDir: SyncWrites:false NumVersionsToKeep:1 ReadOnly:false Logger:0xc0001cab50 Compression:1 InMemory:false MetricsEnabled:true NumGoroutines:8 MemTableSize:67108864 BaseTableSize:2097152 BaseLevelSize:10485760 LevelSizeMultiplier:10 TableSizeMultiplier:2 MaxLevels:7 VLogPercentile:0 ValueThreshold:1048576 NumMemtables:5 BlockSize:4096 BloomFalsePositive:0.01 BlockCacheSize:697932185 IndexCacheSize:375809638 NumLevelZeroTables:5 NumLevelZeroTablesStall:15 ValueLogFileSize:1073741823 ValueLogMaxEntries:1000000 NumCompactors:4 CompactL0OnClose:false LmaxCompaction:false ZSTDCompressionLevel:0 VerifyValueChecksum:false EncryptionKey:[] EncryptionKeyRotationDuration:240h0m0s BypassLockGuard:false ChecksumVerificationMode:0 DetectConflicts:true NamespaceOffset:-1 managedTxns:false maxBatchCount:0 maxBatchSize:0 maxValueThreshold:0} WhiteListedIPRanges:[] StrictMutations:false AclEnabled:false HmacSecret:**** AbortOlderThan:5m0s ProposedGroupId:0 StartTime:2021-08-05 19:16:15.798430129 +0000 UTC m=+0.265114410 Ludicrous:enabled=false; concurrency=2000 LudicrousEnabled:false Security:token=; whitelist= EncryptionKey:**** LogRequest:0 HardSync:false Audit:false}
I0805 19:16:16.396923 19 run.go:754] worker.Config: {PostingDir:p WALDir:w MutationsMode:0 AuthToken: HmacSecret:**** AccessJwtTtl:0s RefreshJwtTtl:0s CachePercentage:0,65,35 CacheMb:1024 Audit:<nil> ChangeDataConf:file=; kafka=; sasl_user=; sasl_password=; ca_cert=; client_cert=; client_key=; sasl-mechanism=PLAIN;}
I0805 19:16:16.397085 19 log.go:295] Found file: 1 First Index: 0
I0805 19:16:16.399098 19 storage.go:125] Init Raft Storage with snap: 0, first: 1, last: 0
I0805 19:16:16.399128 19 server_state.go:140] Opening postings BadgerDB with options: {Dir:p ValueDir:p SyncWrites:false NumVersionsToKeep:2147483647 ReadOnly:false Logger:0x33e3080 Compression:1 InMemory:false MetricsEnabled:true NumGoroutines:8 MemTableSize:67108864 BaseTableSize:2097152 BaseLevelSize:10485760 LevelSizeMultiplier:10 TableSizeMultiplier:2 MaxLevels:7 VLogPercentile:0 ValueThreshold:1048576 NumMemtables:5 BlockSize:4096 BloomFalsePositive:0.01 BlockCacheSize:697932185 IndexCacheSize:375809638 NumLevelZeroTables:5 NumLevelZeroTablesStall:15 ValueLogFileSize:1073741823 ValueLogMaxEntries:1000000 NumCompactors:4 CompactL0OnClose:false LmaxCompaction:false ZSTDCompressionLevel:0 VerifyValueChecksum:false EncryptionKey:[] EncryptionKeyRotationDuration:240h0m0s BypassLockGuard:false ChecksumVerificationMode:0 DetectConflicts:false NamespaceOffset:1 managedTxns:false maxBatchCount:0 maxBatchSize:0 maxValueThreshold:0}
I0805 19:16:16.425051 19 log.go:34] All 0 tables opened in 0s
I0805 19:16:16.427041 19 log.go:34] Discard stats nextEmptySlot: 0
I0805 19:16:16.427190 19 log.go:34] Set nextTxnTs to 0
I0805 19:16:16.431935 19 groups.go:99] Current Raft Id: 0x0
I0805 19:16:16.432064 19 worker.go:114] Worker listening at address: [::]:7080
I0805 19:16:16.432003 19 groups.go:115] Sending member request to Zero: addr:"dgraph-alpha-0.dgraph-alpha.hm.svc.dev.k8s-hongbomiao.com:7080"
I0805 19:16:16.434244 19 run.go:565] Bringing up GraphQL HTTP API at 0.0.0.0:8080/graphql
I0805 19:16:16.434300 19 run.go:566] Bringing up GraphQL HTTP admin API at 0.0.0.0:8080/admin
I0805 19:16:16.434320 19 run.go:593] gRPC server started. Listening on port 9080
I0805 19:16:16.434330 19 run.go:594] HTTP server started. Listening on port 8080
E0805 19:16:16.434370 19 groups.go:1181] Error during SubscribeForUpdates for prefix "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
I0805 19:16:16.534017 19 pool.go:162] CONNECTING to dgraph-zero-0.dgraph-zero.hm.svc.cluster.local:5080
W0805 19:16:16.537177 19 pool.go:267] Connection lost with dgraph-zero-0.dgraph-zero.hm.svc.cluster.local:5080. Error: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp: lookup dgraph-zero-0.dgraph-zero.hm.svc.cluster.local: no such host"
I0805 19:16:16.737992 19 pool.go:162] CONNECTING to dgraph-zero-1.dgraph-zero.hm.svc.cluster.local:5080
W0805 19:16:16.740397 19 pool.go:267] Connection lost with dgraph-zero-1.dgraph-zero.hm.svc.cluster.local:5080. Error: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp: lookup dgraph-zero-1.dgraph-zero.hm.svc.cluster.local: no such host"
I0805 19:16:17.141647 19 pool.go:162] CONNECTING to dgraph-zero-2.dgraph-zero.hm.svc.cluster.local:5080
W0805 19:16:17.144077 19 pool.go:267] Connection lost with dgraph-zero-2.dgraph-zero.hm.svc.cluster.local:5080. Error: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp: lookup dgraph-zero-2.dgraph-zero.hm.svc.cluster.local: no such host"
E0805 19:16:17.435876 19 groups.go:1181] Error during SubscribeForUpdates for prefix "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E0805 19:16:18.436001 19 groups.go:1181] Error during SubscribeForUpdates for prefix "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E0805 19:16:19.436210 19 groups.go:1181] Error during SubscribeForUpdates for prefix
Note
transport: Error while dialing dial tcp: lookup dgraph-zero-0.dgraph-zero.hm.svc.cluster.local: no such host
transport: Error while dialing dial tcp: lookup dgraph-zero-1.dgraph-zero.hm.svc.cluster.local: no such host
transport: Error while dialing dial tcp: lookup dgraph-zero-2.dgraph-zero.hm.svc.cluster.local: no such host
inside.
However, they are actually exist
➜ kubectl get pod --context=k3d-dev -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system metrics-server-86cbb8457f-8jzsd 1/1 Running 0 11m
kube-system local-path-provisioner-5ff76fc89d-t29w8 1/1 Running 0 11m
kube-system coredns-7448499f4d-w9htt 1/1 Running 0 11m
hm dgraph-zero-0 1/1 Running 0 4m26s
hm dgraph-zero-1 1/1 Running 0 3m13s
hm dgraph-zero-2 1/1 Running 0 2m50s
hm dgraph-alpha-0 0/1 Running 2 4m26s
➜ kubectl get svc --context=k3d-dev -A
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.43.0.1 <none> 443/TCP 10m
kube-system kube-dns ClusterIP 10.43.0.10 <none> 53/UDP,53/TCP,9153/TCP 10m
kube-system metrics-server ClusterIP 10.43.29.122 <none> 443/TCP 10m
hm dgraph-zero-public ClusterIP 10.43.9.50 <none> 5080/TCP,6080/TCP 3m30s
hm dgraph-alpha-public ClusterIP 10.43.127.25 <none> 8080/TCP,9080/TCP 3m30s
hm dgraph-zero ClusterIP None <none> 5080/TCP 3m30s
hm dgraph-alpha ClusterIP None <none> 7080/TCP 3m30s
My other services in this cluster can talk to each other without any issue.
And I found if I remove --cluster-domain=dev.k8s-hongbomiao.com or change it to --cluster-domain=cluster.local when I create the cluster by k3d, Dgraph HA can be installed without any issue.
However, I need set the cluster domain to do some cluster related work.
How can I install Dgraph HA when there is a cluster domain? Thanks
UPDATE:
I found this happens to Dgraph single server version (Dgraph Alpha and Dgraph are in same pod) too, when I installed by
kubectl create namespace hm
kubectl apply --namespace=hm --filename=https://raw.githubusercontent.com/dgraph-io/dgraph/master/contrib/config/kubernetes/dgraph-single/dgraph-single.yaml
++ hostname -f
+ dgraph alpha --my=dgraph-0.dgraph.hm.svc.dev.k8s-hongbomiao.com:7080 --zero dgraph-0.dgraph.hm.svc.cluster.local:5080
[Sentry] 2021/08/05 22:38:20 Integration installed: ContextifyFrames
[Sentry] 2021/08/05 22:38:20 Integration installed: Environment
[Sentry] 2021/08/05 22:38:20 Integration installed: Modules
[Sentry] 2021/08/05 22:38:20 Integration installed: IgnoreErrors
[Sentry] 2021/08/05 22:38:21 Integration installed: ContextifyFrames
[Sentry] 2021/08/05 22:38:21 Integration installed: Environment
[Sentry] 2021/08/05 22:38:21 Integration installed: Modules
[Sentry] 2021/08/05 22:38:21 Integration installed: IgnoreErrors
I0805 22:38:21.926193 19 sentry_integration.go:48] This instance of Dgraph will send anonymous reports of panics back to Dgraph Labs via Sentry. No confidential information is sent. These reports help improve Dgraph. To opt-out, restart your instance with the --telemetry "sentry=false;" flag. For more info, see https://dgraph.io/docs/howto/#data-handling.
I0805 22:38:22.128588 19 init.go:110]
Dgraph version : v21.03.1
Dgraph codename : rocket-1
Dgraph SHA-256 : a00b73d583a720aa787171e43b4cb4dbbf75b38e522f66c9943ab2f0263007fe
Commit SHA-1 : ea1cb5f35
Commit timestamp : 2021-06-17 20:38:11 +0530
Branch : HEAD
Go version : go1.16.2
jemalloc enabled : true
For Dgraph official documentation, visit https://dgraph.io/docs.
For discussions about Dgraph , visit https://discuss.dgraph.io.
For fully-managed Dgraph Cloud , visit https://dgraph.io/cloud.
Licensed variously under the Apache Public License 2.0 and Dgraph Community License.
Copyright 2015-2021 Dgraph Labs, Inc.
I0805 22:38:22.128647 19 run.go:752] x.Config: {PortOffset:0 Limit:mutations=allow; query-edge=1000000; disallow-drop=false; query-timeout=0ms; txn-abort-after=5m; max-pending-queries=10000; normalize-node=10000; mutations-nquad=1000000; max-retries=-1 LimitMutationsNquad:1000000 LimitQueryEdge:1000000 BlockClusterWideDrop:false LimitNormalizeNode:10000 QueryTimeout:0s MaxRetries:-1 GraphQL:introspection=true; debug=false; extensions=true; poll-interval=1s; lambda-url= GraphQLDebug:false}
I0805 22:38:22.128782 19 run.go:753] x.WorkerConfig: {TmpDir:t ExportPath:export Trace:ratio=0.01; jaeger=; datadog= MyAddr:dgraph-0.dgraph.hm.svc.dev.k8s-hongbomiao.com:7080 ZeroAddr:[dgraph-0.dgraph.hm.svc.cluster.local:5080] TLSClientConfig:<nil> TLSServerConfig:<nil> Raft:learner=false; snapshot-after-entries=10000; snapshot-after-duration=30m; pending-proposals=256; idx=; group= Badger:{Dir: ValueDir: SyncWrites:false NumVersionsToKeep:1 ReadOnly:false Logger:0xc0003961f0 Compression:1 InMemory:false MetricsEnabled:true NumGoroutines:8 MemTableSize:67108864 BaseTableSize:2097152 BaseLevelSize:10485760 LevelSizeMultiplier:10 TableSizeMultiplier:2 MaxLevels:7 VLogPercentile:0 ValueThreshold:1048576 NumMemtables:5 BlockSize:4096 BloomFalsePositive:0.01 BlockCacheSize:697932185 IndexCacheSize:375809638 NumLevelZeroTables:5 NumLevelZeroTablesStall:15 ValueLogFileSize:1073741823 ValueLogMaxEntries:1000000 NumCompactors:4 CompactL0OnClose:false LmaxCompaction:false ZSTDCompressionLevel:0 VerifyValueChecksum:false EncryptionKey:[] EncryptionKeyRotationDuration:240h0m0s BypassLockGuard:false ChecksumVerificationMode:0 DetectConflicts:true NamespaceOffset:-1 managedTxns:false maxBatchCount:0 maxBatchSize:0 maxValueThreshold:0} WhiteListedIPRanges:[] StrictMutations:false AclEnabled:false HmacSecret:**** AbortOlderThan:5m0s ProposedGroupId:0 StartTime:2021-08-05 22:38:21.453562539 +0000 UTC m=+0.311585012 Ludicrous:enabled=false; concurrency=2000 LudicrousEnabled:false Security:token=; whitelist= EncryptionKey:**** LogRequest:0 HardSync:false Audit:false}
I0805 22:38:22.129055 19 run.go:754] worker.Config: {PostingDir:p WALDir:w MutationsMode:0 AuthToken: HmacSecret:**** AccessJwtTtl:0s RefreshJwtTtl:0s CachePercentage:0,65,35 CacheMb:1024 Audit:<nil> ChangeDataConf:file=; kafka=; sasl_user=; sasl_password=; ca_cert=; client_cert=; client_key=; sasl-mechanism=PLAIN;}
I0805 22:38:22.130677 19 storage.go:125] Init Raft Storage with snap: 0, first: 1, last: 0
I0805 22:38:22.130783 19 server_state.go:140] Opening postings BadgerDB with options: {Dir:p ValueDir:p SyncWrites:false NumVersionsToKeep:2147483647 ReadOnly:false Logger:0x33e3080 Compression:1 InMemory:false MetricsEnabled:true NumGoroutines:8 MemTableSize:67108864 BaseTableSize:2097152 BaseLevelSize:10485760 LevelSizeMultiplier:10 TableSizeMultiplier:2 MaxLevels:7 VLogPercentile:0 ValueThreshold:1048576 NumMemtables:5 BlockSize:4096 BloomFalsePositive:0.01 BlockCacheSize:697932185 IndexCacheSize:375809638 NumLevelZeroTables:5 NumLevelZeroTablesStall:15 ValueLogFileSize:1073741823 ValueLogMaxEntries:1000000 NumCompactors:4 CompactL0OnClose:false LmaxCompaction:false ZSTDCompressionLevel:0 VerifyValueChecksum:false EncryptionKey:[] EncryptionKeyRotationDuration:240h0m0s BypassLockGuard:false ChecksumVerificationMode:0 DetectConflicts:false NamespaceOffset:1 managedTxns:false maxBatchCount:0 maxBatchSize:0 maxValueThreshold:0}
I0805 22:38:22.145325 19 log.go:34] All 0 tables opened in 0s
I0805 22:38:22.147849 19 log.go:34] Discard stats nextEmptySlot: 0
I0805 22:38:22.147915 19 log.go:34] Set nextTxnTs to 0
I0805 22:38:22.150591 19 groups.go:99] Current Raft Id: 0x0
I0805 22:38:22.150605 19 worker.go:114] Worker listening at address: [::]:7080
I0805 22:38:22.150643 19 groups.go:115] Sending member request to Zero: addr:"dgraph-0.dgraph.hm.svc.dev.k8s-hongbomiao.com:7080"
I0805 22:38:22.153357 19 run.go:565] Bringing up GraphQL HTTP API at 0.0.0.0:8080/graphql
I0805 22:38:22.153486 19 run.go:566] Bringing up GraphQL HTTP admin API at 0.0.0.0:8080/admin
I0805 22:38:22.153549 19 run.go:593] gRPC server started. Listening on port 9080
I0805 22:38:22.153584 19 run.go:594] HTTP server started. Listening on port 8080
E0805 22:38:22.153632 19 groups.go:1181] Error during SubscribeForUpdates for prefix "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
I0805 22:38:22.251622 19 pool.go:162] CONNECTING to dgraph-0.dgraph.hm.svc.cluster.local:5080
W0805 22:38:22.472690 19 pool.go:267] Connection lost with dgraph-0.dgraph.hm.svc.cluster.local:5080. Error: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp: lookup dgraph-0.dgraph.hm.svc.cluster.local: no such host"
E0805 22:38:23.154976 19 groups.go:1181] Error during SubscribeForUpdates for prefix "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E0805 22:38:24.155661 19 groups.go:1181] Error during SubscribeForUpdates for prefix "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x15dgraph.graphql.schema\x00": Unable to find any servers for group: 1. closer err: <nil>
E0805 22:38:25.156576 19 groups.go:1181] Error during SubscribeForUpdates for prefix
Solution
Found the issue, it is because the Dgraph yaml hard coded .svc.cluster.local.
Opened the pull request at https://github.com/dgraph-io/dgraph/pull/7976 to resolve the issue.
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