From db snapshot

[pepoviola]

cc @michalkucharczyk

• Add db_snapshot / default_db_snapshot config (nodes/relay-chain)
• Add test using db_snapshot.

[michalkucharczyk]

What would be the usage of db_snapshot?

Like this?

[relaychain]
default_image = "docker.io/paritypr/polkadot-debug:master"
default_command = "polkadot"
default_args = [ "-lparachain=debug" ]

chain = "rococo-local"

  [[relaychain.nodes]]
  name = "alice"
  validator = true
  db_snapshot = "https://storage.googleapis.com/zombienet-db-snaps/chains-test-alice.tgz"
  
  [[relaychain.nodes]]
  name = "bob"
  validator = true
  db_snapshot = "https://storage.googleapis.com/zombienet-db-snaps/chains-test-bob.tgz"

Maybe it would be good to include some examples, and also add a note about this feature do documentation?

[pepoviola]

What would be the usage of db_snapshot?

Like this?

[relaychain]
default_image = "docker.io/paritypr/polkadot-debug:master"
default_command = "polkadot"
default_args = [ "-lparachain=debug" ]

chain = "rococo-local"

  [[relaychain.nodes]]
  name = "alice"
  validator = true
  db_snapshot = "https://storage.googleapis.com/zombienet-db-snaps/chains-test-alice.tgz"
  
  [[relaychain.nodes]]
  name = "bob"
  validator = true
  db_snapshot = "https://storage.googleapis.com/zombienet-db-snaps/chains-test-bob.tgz"

Maybe it would be good to include some examples, and also add a note about this feature do documentation?

Yes, you can also use like this

[relaychain]
default_image = "docker.io/paritypr/polkadot-debug:master"
default_command = "polkadot"
default_args = [ "-lparachain=debug" ]
default_db_snapshot = "https://storage.googleapis.com/zombienet-db-snaps/chains-test.tgz"

chain = "rococo-local"

  [[relaychain.nodes]]
  name = "alice"
  validator = true

  [[relaychain.nodes]]
  name = "bob"
  validator = true

I will update the docs in a follow up pr.

[michalkucharczyk]

nit: we could also check that block height is equal to the height from db.

[pepoviola]

Yes, but in this case I saved a small db with a few blocks but with a transfer to check the balance.
Thanks!

[michalkucharczyk]

fails for podman provider.

[pepoviola]

fails for podman provider.

Can you share the error please?

[michalkucharczyk]

fails for podman provider.

Can you share the error please?

The error is caused by this: #604 (comment)

Error message:

Error: Command failed with exit code 125: podman -c cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz
Error: missing command 'podman COMMAND'
Try 'podman --help' for more information.
    at makeError (/snapshot/javascript/node_modules/execa/lib/error.js:60:11)
    at handlePromise (/snapshot/javascript/node_modules/execa/index.js:118:26)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  shortMessage: 'Command failed with exit code 125: podman -c cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz',
  command: 'podman -c cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz',
  escapedCommand: 'podman -c "cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz"',
  exitCode: 125,
  signal: undefined,
  signalDescription: undefined,
  stdout: '',
  stderr: "Error: missing command 'podman COMMAND'\n" +
    "Try 'podman --help' for more information.",
  failed: true,
  timedOut: false,
  isCanceled: false,
  killed: false
}
Error: Command failed with exit code 125: podman -c cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz
Error: missing command 'podman COMMAND'
Try 'podman --help' for more information.
    at makeError (/snapshot/javascript/node_modules/execa/lib/error.js:60:11)
    at handlePromise (/snapshot/javascript/node_modules/execa/index.js:118:26)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  shortMessage: 'Command failed with exit code 125: podman -c cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz',
  command: 'podman -c cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz',
  escapedCommand: 'podman -c "cd /tmp/zombie-6fb1cc5d_-1858348-hcgAgBX105OF/alice/data/chains && tar -xzvf db.tgz"',
  exitCode: 125,
  signal: undefined,
  signalDescription: undefined,
  stdout: '',
  stderr: "Error: missing command 'podman COMMAND'\n" +
    "Try 'podman --help' for more information.",
  failed: true,
  timedOut: false,
  isCanceled: false,
  killed: false
}

[pepoviola]

@michalkucharczyk podman fixed