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docs: host_network does support Docker task port mapping #10774

Merged
merged 1 commit into from
Jun 17, 2021
Merged

docs: host_network does support Docker task port mapping #10774

merged 1 commit into from
Jun 17, 2021

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tgross
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@tgross tgross commented Jun 16, 2021 •
edited

Fixes #10010

Per the discussion in #10010 (comment) this has worked fine for a quite a while but we forgot to remove the note. The other items in that comment were addressed in docs fixes in #10766 and #10724.

To demonstrate, run the following job on a machine with a second network named "public" configured:

jobspec 
job "example" {
  datacenters = ["dc1"]

  group "web" {

    network {
      mode = "bridge"
      port "www" {
        to           = 8001
        host_network = "public"
      }
    }

    task "httpd" {
      driver = "docker"

      config {
        image   = "busybox:1"
        command = "httpd"
        args    = ["-v", "-f", "-p", "8001", "-h", "/local"]
        ports   = ["www"]
      }

      template {
        data        = "<html>hello, world</html>"
        destination = "local/index.html"
      }

      resources {
        cpu    = 128
        memory = 128
      }
    }
  }
}
$ nomad job run ./example.nomad
==> 2021-06-16T15:26:51-04:00: Monitoring evaluation "e9a1cdc0"
    2021-06-16T15:26:51-04:00: Evaluation triggered by job "example"
    2021-06-16T15:26:51-04:00: Evaluation within deployment: "db3499e8"
    2021-06-16T15:26:51-04:00: Allocation "b568505f" created: node "5e57b6a0", group "web"
    2021-06-16T15:26:51-04:00: Evaluation status changed: "pending" -> "complete"
==> 2021-06-16T15:26:51-04:00: Evaluation "e9a1cdc0" finished with status "complete"
==> 2021-06-16T15:26:51-04:00: Monitoring deployment "db3499e8"
  ⠦ Deployment "db3499e8" in progress...
...

$ nomad alloc status b5685
...

Allocation Addresses (mode = "bridge")
Label  Dynamic  Address
*www   yes      10.199.0.200:23377 -> 8001

$ curl 10.199.0.200:23377
<html>hello, world</html>

@tgross tgross added this to the 1.1.2 milestone Jun 16, 2021
@tgross tgross added theme/docs Documentation issues and enhancements theme/networking labels Jun 16, 2021
shoenig
shoenig approved these changes Jun 17, 2021
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LGTM

@tgross tgross merged commit ad3070a into main Jun 17, 2021
@tgross tgross deleted the docs-host-network-port-mapping branch June 17, 2021 13:11
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@shoenig shoenig shoenig approved these changes

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Successfully merging this pull request may close these issues.

Multi-Interface doesn't work if using network_mode stanza in docker driven task
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