cannot access nomad docker task via local ip:port - docker

Question

with following job config. curl NOMAD_IP_http:NOMAD_PORT_http cannot access http-echo service.
there is no listenig port on localhost for incomming request.
why and how to access the http-echo service
job "job" {
datacenters = ["dc1"]
group "group" {
count = 2
network {
port "http" {}
}
service {
name = "http-echo"
port = "http"
tags = [
"http-echo",
]
check {
type = "http"
path = "/health"
interval = "30s"
timeout = "2s"
}
}
task "task" {
driver = "docker"
config {
image = "hashicorp/http-echo:latest"
args = [
"-listen", ":${NOMAD_PORT_http}",
"-text", "Hello and welcome to ${NOMAD_IP_http} running on port ${NOMAD_PORT_http}",
]
}
resources {}
}
}
}
UPDATE
after config driver network_mode, curl successfully.
network_mode = "host"

Answer 1

You forgot to add ports at job -> group -> task ->ports
Now it works on latest nomad(v1.1.3+).
job "job" {
datacenters = ["dc1"]
group "group" {
count = 2
network {
port "http" {}
# or maps to container's default port
# port "http" {
# to = 5678
# }
#
}
service {
name = "http-echo"
port = "http"
tags = [
"http-echo",
]
check {
type = "http"
path = "/health"
interval = "30s"
timeout = "2s"
}
}
task "task" {
driver = "docker"
config {
image = "hashicorp/http-echo:latest"
args = [
"-listen", ":${NOMAD_PORT_http}",
"-text", "Hello and welcome to ${NOMAD_IP_http} running on port ${NOMAD_PORT_http}",
]
ports = ["http"]
}
resources {}
}
}
}
Then run docker ps, you will get the mapped port, and curl works.