[rancher] invalid memory address or nil pointer dereference

[rafaelgaspar]

What version of Traefik are you using (traefik version)?

v1.2.0-rc1

What is your environment & configuration (arguments, toml...)?

--etcd --etcd.endpoint=etcd:2379 --rancher --logLevel=DEBUG

On etcd I have this keys:
/traefik/web/address = ":8080"
/traefik/entryPoints/entryPoints.http/address = ":80"
/traefik/leader = "b6cb798d-e055-4b8d-8e6e-59f9374063e2"

What did you do?

I run the container with options above.

What did you expect to see?

I expected to see Rancher as one of the providers.

What did you see instead?

No Rancher provider and an invalid memory address or nil pointer dereference error on the log bellow.

2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Traefik version v1.2.0-rc1 built on 2017-02-06_08:45:49PM
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Global configuration loaded {"GraceTimeOut":10,"Debug":false,"CheckNewVersion":true,"AccessLogsFile":"","TraefikLogsFile":"","LogLevel":"DEBUG","EntryPoints":{"entryPoints.http":{"Network":"","Address":":80","TLS":null,"Redirect":null,"Auth":null,"Compress":false}},"Cluster":{"Node":"bc0d16de-e5bf-4b48-95f7-83c8a0b1ff3a","Store":{"Store":{},"Prefix":"/traefik"}},"Constraints":[],"ACME":null,"DefaultEntryPoints":[],"ProvidersThrottleDuration":2000000000,"MaxIdleConnsPerHost":200,"InsecureSkipVerify":false,"Retry":null,"Docker":null,"File":null,"Web":{"Address":":8080","CertFile":"","KeyFile":"","ReadOnly":false,"Statistics":null,"Metrics":null,"Auth":null},"Marathon":null,"Consul":null,"ConsulCatalog":null,"Etcd":{"Watch":true,"Filename":"","Constraints":[],"Endpoint":"etcd:2379","Prefix":"/traefik","TLS":null},"Zookeeper":null,"Boltdb":null,"Kubernetes":null,"Mesos":null,"Eureka":null,"ECS":null,"Rancher":{"Watch":true,"Filename":"","Constraints":null,"Endpoint":"","AccessKey":"","SecretKey":"","ExposedByDefault":true,"Domain":""}}
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Preparing server entryPoints.http &{Network: Address::80 TLS:<nil> Redirect:<nil> Auth:<nil> Compress:false}
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Starting provider *main.WebProvider {"Address":":8080","CertFile":"","KeyFile":"","ReadOnly":false,"Statistics":null,"Metrics":null,"Auth":null}
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Starting provider *provider.Etcd {"Watch":true,"Filename":"","Constraints":[],"Endpoint":"etcd:2379","Prefix":"/traefik","TLS":null}
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Starting provider *provider.Rancher {"Watch":true,"Filename":"","Constraints":null,"Endpoint":"","AccessKey":"","SecretKey":"","ExposedByDefault":true,"Domain":""}
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Node bc0d16de-e5bf-4b48-95f7-83c8a0b1ff3a running for election
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] 0s
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Starting server on :80
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Node bc0d16de-e5bf-4b48-95f7-83c8a0b1ff3a elected slave ♝
2/7/2017 1:32:29 PMERRO[2017-02-07T15:32:29Z] Error in Go routine: runtime error: invalid memory address or nil pointer dereference
2/7/2017 1:32:29 PMgoroutine 46 [running]:
2/7/2017 1:32:29 PMruntime/debug.Stack(0x4e808f, 0xc420016280, 0x1d9a271)
2/7/2017 1:32:29 PM	/usr/local/go/src/runtime/debug/stack.go:24 +0x79
2/7/2017 1:32:29 PMruntime/debug.PrintStack()
2/7/2017 1:32:29 PM	/usr/local/go/src/runtime/debug/stack.go:16 +0x22
2/7/2017 1:32:29 PMgithub.com/containous/traefik/safe.defaultRecoverGoroutine(0x1ada8e0, 0xc420010020)
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/safe/routine.go:147 +0x7d
2/7/2017 1:32:29 PMgithub.com/containous/traefik/safe.GoWithRecover.func1.1(0x1e96ec8)
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/safe/routine.go:138 +0x57
2/7/2017 1:32:29 PMpanic(0x1ada8e0, 0xc420010020)
2/7/2017 1:32:29 PM	/usr/local/go/src/runtime/panic.go:458 +0x243
2/7/2017 1:32:29 PMgithub.com/containous/traefik/provider.listRancherEnvironments(0x0, 0x0, 0x2a6f540, 0xc4202ada40)
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/provider/rancher.go:277 +0x5e
2/7/2017 1:32:29 PMgithub.com/containous/traefik/provider.(*Rancher).Provide.func1.1(0xc420777620, 0x42b198)
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/provider/rancher.go:211 +0x9e
2/7/2017 1:32:29 PMgithub.com/containous/traefik/vendor/github.com/cenk/backoff.RetryNotify(0xc420787a80, 0x2a73a80, 0xc4207b64b0, 0x1e96e68, 0xc42001f748, 0x65d94f)
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/vendor/github.com/cenk/backoff/retry.go:32 +0x3f
2/7/2017 1:32:29 PMgithub.com/containous/traefik/provider.(*Rancher).Provide.func1()
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/provider/rancher.go:264 +0x132
2/7/2017 1:32:29 PMgithub.com/containous/traefik/safe.GoWithRecover.func1(0x1e96ec8, 0xc420787a60)
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/safe/routine.go:141 +0x4d
2/7/2017 1:32:29 PMcreated by github.com/containous/traefik/safe.GoWithRecover
2/7/2017 1:32:29 PM	/go/src/github.com/containous/traefik/safe/routine.go:142 +0x49
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Cannot get key /traefik/alias Key not found in store, setting default /traefik
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Cannot get keys /traefik/frontends/ Key not found in store
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Cannot get key /traefik/alias Key not found in store, setting default /traefik
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Cannot get keys /traefik/backends/ Key not found in store
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Configuration received from provider etcd: {}
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Last etcd config received more than 2s, OK
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Server configuration reloaded on :80
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Cannot get keys /traefik/frontends/ Key not found in store
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Cannot get keys /traefik/backends/ Key not found in store
2/7/2017 1:32:29 PMDEBU[2017-02-07T15:32:29Z] Configuration received from provider etcd: {}
2/7/2017 1:32:29 PMINFO[2017-02-07T15:32:29Z] Skipping same configuration for provider etcd

[SantoDE]

hey @rafaelgaspar ,

as long as the PR #1127 is not merged yet, you also need to provide --rancher.endpoint=XX, --rancher.accesskey=XXand --rancher.secretkey=XX.

However, having a nil adress is not very good (shame on me). I'll look into this :)

[SantoDE]

Hey @rafaelgaspar,

I fixed that issue in the PR #1127 mentioned above. After merge, this issue will be resolved. Thanks! :)