Nomad crashes parsing job definition

[c4milo]

job "docker" {
    datacenters = ["iad2"]
    type = "service"
    priority = 1

    constraint {
        attribute = "$attr.kernel.name"
        value = "linux"
    }

    group "api" {
        count = 2
        restart {
            interval = "5m"
            attempts = 10
            delay = "25s"
        }

        task "registry" {
            driver = "docker"

            env {
                LOG_LEVEL="debug"
                REGISTRY_STORAGE="s3"
                REGISTRY_STORAGE_S3_ACCESSKEY=""
                REGISTRY_STORAGE_S3_SECRETKEY=""
                REGISTRY_STORAGE_S3_REGION="us-east-1"
                REGISTRY_STORAGE_S3_BUCKET="mybucket"
                REGISTRY_STORAGE_S3_ROOTDIRECTORY="/foo/bar/registry"
            }

            config {
                image = "registry:2"
                network_mode = "host"
            }

            service {
                name = "per-docker-registry"
                tags = ["global", "docker", "registry"]
                port = "http"
                check {
                    type = "http"
                    path = "/v2/"
                    interval = "10s"
                    timeout = "2s"
                }
            }

            resources {
                cpu = 1000 # Mhz
                memory = 1024 # MB
                network {
                    mbits = 100
                    port {
                        static = 5000
                    }
                }
            }
        }
    }
}

$ nomad run -address 192.168.50.4 registry.nomad
panic: runtime error: index out of range

goroutine 1 [running]:
github.com/hashicorp/nomad/jobspec.parsePorts(0xc820114520, 0xc820189960, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:626 +0x87c
github.com/hashicorp/nomad/jobspec.parseResources(0xc820117c40, 0xc8201d2de0, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:612 +0x55e
github.com/hashicorp/nomad/jobspec.parseTasks(0xc820106271, 0x6, 0xc8201068d1, 0x3, 0xc820183958, 0xc8201cb0c0, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:477 +0x107b
github.com/hashicorp/nomad/jobspec.parseGroups(0xc8201c0000, 0xc820115e60, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:258 +0xcd0
github.com/hashicorp/nomad/jobspec.parseJob(0xc8201c0000, 0xc8201145c0, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:172 +0xde4
github.com/hashicorp/nomad/jobspec.Parse(0x55c0ec8, 0xc820112048, 0xc820112048, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:53 +0x404
github.com/hashicorp/nomad/jobspec.ParseFile(0xc820108320, 0x49, 0x0, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/jobspec/parse.go:73 +0x15c
github.com/hashicorp/nomad/command.(*RunCommand).Run(0xc8201140e0, 0xc82000a1d0, 0x1, 0x1, 0xc8201ac308)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/command/run.go:77 +0x28a
github.com/mitchellh/cli.(*CLI).Run(0xc8201b0000, 0xc8201b0000, 0x0, 0x0)
    /Users/c4milo/go/src/github.com/mitchellh/cli/cli.go:112 +0x698
main.RunCustom(0xc82000a1a0, 0x4, 0x4, 0xc820104600, 0x0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/main.go:47 +0x469
main.Run(0xc82000a1a0, 0x4, 0x4, 0x4b22bc8)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/main.go:15 +0x4c
main.main()
    /Users/c4milo/go/src/github.com/hashicorp/nomad/main.go:11 +0x60

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/local/Cellar/go/1.5.2/libexec/src/runtime/asm_amd64.s:1721 +0x1

goroutine 5 [syscall]:
os/signal.loop()
    /usr/local/Cellar/go/1.5.2/libexec/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.1
    /usr/local/Cellar/go/1.5.2/libexec/src/os/signal/signal_unix.go:28 +0x37

goroutine 18 [semacquire]:
sync.runtime_Syncsemacquire(0xc8201b2040)
    /usr/local/Cellar/go/1.5.2/libexec/src/runtime/sema.go:237 +0x201
sync.(*Cond).Wait(0xc8201b2030)
    /usr/local/Cellar/go/1.5.2/libexec/src/sync/cond.go:62 +0x9b
io.(*pipe).read(0xc8201b2000, 0xc8201b4000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
    /usr/local/Cellar/go/1.5.2/libexec/src/io/pipe.go:52 +0x2d2
io.(*PipeReader).Read(0xc820112038, 0xc8201b4000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
    /usr/local/Cellar/go/1.5.2/libexec/src/io/pipe.go:134 +0x50
bufio.(*Scanner).Scan(0xc820118100, 0x0)
    /usr/local/Cellar/go/1.5.2/libexec/src/bufio/scan.go:180 +0x877
github.com/hashicorp/nomad/command.(*Meta).FlagSet.func1(0xc820118100, 0xc8201140e0)
    /Users/c4milo/go/src/github.com/hashicorp/nomad/command/meta.go:59 +0x25
created by github.com/hashicorp/nomad/command.(*Meta).FlagSet
    /Users/c4milo/go/src/github.com/hashicorp/nomad/command/meta.go:62 +0x3ce

The issue is that I forgot to add the label "http" to the port block within the network resource

[diptanu]

@c4milo We expect all ports to be named

So if you add a name to the port, the parsing should work

port "httpapi" {
     static = 5000
}

[diptanu]

@c4milo Added a PR which would throw an error instead of Nomad crashing.

[c4milo]

@diptanu, thanks for the really fast response. 👍

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