Use local image `file:///` with `docker run`

[solo-io]

Use local image `file:///` with `docker run`

[yuval-k]

images should be cached, even if you use url - do you find this is not the case? are you using the latest version?

[ChristianKniep]

I want to use the outcome of a previous build to be used in a subsequent one.
The first downloads an image and sets up some basic things and might take a while and the second run will just change some config which should be rather fast.

[ChristianKniep]

Figured it out...
I renamed the image to prom_base.img and ran this.

{
  "variables": {},
  "builders": [
    {
      "type": "arm-image",
      "iso_url": "file:////build/output-arm-image/prom_base.img",
      "last_partition_extra_size": 1048576000,
      "iso_checksum_type": "md5",
      "iso_checksum": "6415daf45a89e98339180bd59de0ec12",
      "image_type": "raspberrypi",
      "image_mounts": ["/boot", "/"]

    }
  ],
  "provisioners": [
    {
        "type": "shell",
        "inline": [
            "mkdir -p /opt/build/samples"
        ]
    },{
        "type": "file",
        "source": "/build/samples/",
        "destination": "/opt/build/samples"
    },{
        "type": "shell",
        "inline": [
            "bash -x /opt/build/samples/scripts/prometheus_setup.sh",
            "bash -x /opt/build/samples/scripts/grafana_setup.sh",
            "bash -x /opt/build/samples/scripts/loki_setup.sh"
        ]
    },{
      "type": "shell",
      "inline": [
          "rm -rf /opt/build"
      ]
  }
  ]
}

Ran it like that...

docker run --rm --privileged
  -v ${PWD}:/build:ro -v ${PWD}/packer_cache:/build/packer_cache \
  -v ${PWD}/output-arm-image:/build/output-arm-image \
  packer-builder-arm build samples/raspbian_prom_setup.json