PLT-7566 Add docker images for marlowe-apps

[jhbertra]

Pre-submit checklist:

• Branch
  • Tests are provided (if possible)
  • Test report is updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
  • Relevant tickets are mentioned in commit messages
  • Formatting, PNG optimization, etc. are updated
• PR
  • Self-reviewed the diff
  • Useful pull request description
    • Review required
    • Substantial changes to code, test, or documentation
    • Change made to Marlowe validator (@bwbush and @palas must be included as reviewers)
    • Review not required
    • Minor changes to non-critical code, documentation, nix derivations, configuration files, or scripts
    • Formatting, spelling, grammar, or reorganization
  • Reviewer requested

[jhbertra]

Fixes input-output-hk/marlowe-starter-kit#42

[bwbush]

In order to use an external keyfile, don't we need a volume that we can bind to? We'll need to document this.

[jhbertra]

Yes, that is the idea. Where best to document this I wonder.

[bwbush]

The code and images look good, except for an unset environment variables that I noted.

I verified that the oracle works outside of the container.

However, when I run the image, the oracle crashes early with an apparent inability to connect to the marlowe-tx-proxy service, even though the ping to the port succeeds. Note that the Runtime service is at this very same commit.

Connection to 192.168.0.9 13780 port [tcp/*] succeeded!
{"DiscoveryProcess":{"duration":60.055698835,"end":"2023-09-22T02:31:40.301659265Z","event-id":"7a8e1c7e-97a9-4301-a325-7045a4133cff","start":"2023-09-22T02:30:40.24596043Z","unstructured-exception":"DeserializeError {message = \"not enough bytes\", offset = 0, unconsumedInput = \"\"}"}}
marlowe-oracle: DeserializeError {message = "not enough bytes", offset = 0, unconsumedInput = ""}
{"OracleProcess":{"duration":60.058800326,"end":"2023-09-22T02:31:40.304757094Z","event-id":"48aecbb1-7cce-45a6-a80a-ac94f1b840c2","start":"2023-09-22T02:30:40.245956768Z","unstructured-exception":"thread blocked indefinitely in an STM transaction"}}
marlowe-oracle: thread blocked indefinitely in an STM transaction
{"DetectionProcess":{"duration":60.058783247,"end":"2023-09-22T02:31:40.304808034Z","event-id":"2ebc936c-df46-4140-a278-5763d8295375","start":"2023-09-22T02:30:40.246024787Z","unstructured-exception":"thread blocked indefinitely in an STM transaction"}}

This may be a problem with my test environment, but the kube file is pretty simple:

kind: Pod

metadata:
  name: mrt-preprod-oracle
  labels:
    app: mrt-preprod-oracle

spec:

  hostname: mrt-preprod-oracle

  containers:

  - name: marlowe-oracle
    image: docker.io/bwbush/marlowe-oracle:ee6889829b67adb5af128d8786f6212eebcacc43
    env:
    - name: MARLOWE_RT_HOST
      value: 192.168.0.9
    - name: RUNTIME_HOST  # A workaround for a bug in operable.
      value: 192.168.0.9
    - name: MARLOWE_RT_PORT
      value: 13780
    - name: RUNTIME_PORT  # A workaround for a bug in operable.
      value: 13780
    - name: ADDRESS
      value: addr_test1vq9prvx8ufwutkwxx9cmmuuajaqmjqwujqlp9d8pvg6gupczgtm9j
    - name: KEYFILE
      value: /data/treasury/payment.skey
    volumeMounts:
    - mountPath: /data/treasury
      name: treasury

  volumes:
  - name: treasury
    hostPath:
      type: Directory
      path: /extra/iohk/networks/treasury

  restartPolicy: Always
  enableServiceLinks: false
  automountServiceAccountToken: false

status: {}

[bwbush]

Do we need to add the following because an export is required for the app to see the variable? Or does docker automatically mark the variable as exported?

export MARLOWE_RT_HOST="''${MARLOWE_RT_HOST}"

[jhbertra]

That should not be necessary

[jhbertra]

Also, the connection is successful, but something is going wrong over the wire

[jhbertra]

You would see a different error if the connection failed, not a DeserializeError

[bwbush]

I resolved the oracle crash, which was due to a misconfigured container.