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create data on one node, load it on another

Set up an env.sh as follows:

export CLOUDSDK_CORE_PROJECT=dotmesh-demos
export CLOUDSDK_COMPUTE_ZONE=europe-west1-d
export CLOUDSDK_IMAGE_BUCKET=dotmesh-linuxkit-demo

source env.sh

Write metadata.json:

{
  "dotmesh": {
     "entries": {
       "credentials": {
          "content": "<dothub-username>:<api-key>"
       },
       "admin-api-key": {
          "content": "<local-random-api-key>"
       },
       "admin-password": {
          "content": "<local-random-password>"
       }
    }
  }
}

gcloud compute firewall-rules create "dotmesh" --allow tcp:32607 --description="Allow dotmesh access"

make build-and-push-gcp

In another terminal:

linuxkit run gcp -data-file metadata.json -disk size=1G -name dotmesh0 dotmesh

Back on the first:

ADMIN_API_KEY=$(
    cat metadata.json |
    jq '.dotmesh.entries["admin-api-key"].content' |tr -d '"'
)

DOTMESH0_IP=$(
    gcloud compute instances describe --format json dotmesh0 |
    jq .networkInterfaces[0].accessConfigs[0].natIP |tr -d '"'
)

echo $ADMIN_API_KEY |dm remote add linuxkit-0 admin@$DOTMESH0_IP

dm list

On your dotmesh0 serial console:

cd /var/dot/test
echo "IT WORKS" > HELLO

Back on your first terminal:

dm commit -m "It works commit."
dm push hub test

This assumes you've got an account set up on dothub and configured your dm client with it. Go and check that the commit made it to the dothub.

Now you can seed a new LinuxKit from the first:

Write metadata-seed.json (<dot-name> is test in the dotmesh.yml):

{
  "dotmesh": {
     "entries": {
       "seed": {
          "content": "dothub.com/<dothub-username>/<dot-name>"
       },
       "credentials": {
          "content": "<dothub-username>:<api-key>"
       },
       "admin-api-key": {
          "content": "<local-random-api-key>"
       },
       "admin-password": {
          "content": "<local-random-password>"
       }
    }
  }
}

In a third terminal:

linuxkit run gcp -data-file metadata-seed.json -disk size=1G -name dotmesh1 dotmesh

DOTMESH1_IP=$(
    gcloud compute instances describe --format json dotmesh1 |
    jq .networkInterfaces[0].accessConfigs[0].natIP |tr -d '"'
)

echo $ADMIN_API_KEY |dm remote add linuxkit-1 admin@$DOTMESH1_IP

dm list

You should see it show up, and also, any app you're running on the second LinuxKit should be seeded with the data from the first!