Make ssl_channel_credentials async

[NickCao]

Summary by CodeRabbit

• Refactor
  • Converted channel credential and channel factory methods to asynchronous operations.
  • Introduced a timeout mechanism to enhance error management by catching delays and reporting connection issues.
  • Updated related workflows to await asynchronous operations, ensuring smoother and more responsive communication.

[coderabbitai]

Walkthrough

This pull request converts the ssl_channel_credentials function from a synchronous to an asynchronous function by updating its definition and adding a timeout parameter. The implementation now uses anyio.fail_after to enforce the timeout for obtaining server certificates and re-raises timeout issues as a ConnectionError. In addition, all call sites—including those in router streams, client configuration, and exporter configuration—have been updated to await the asynchronous function, ensuring proper asynchronous handling throughout the gRPC channel and stub creation workflows.

Changes

File(s)	Summary
packages/jumpstarter/jumpstarter/common/grpc.py	Updated ssl_channel_credentials to an async function with a timeout parameter; integrated anyio.fail_after for timeout management and enhanced error handling by converting TimeoutError to ConnectionError.
packages/jumpstarter/jumpstarter/common/streams.py, packages/jumpstarter/jumpstarter/config/client.py, packages/jumpstarter/jumpstarter/config/exporter.py	Modified calls to ssl_channel_credentials to use await, aligning with its new asynchronous signature and ensuring synchronous compatibility across components.
packages/jumpstarter/jumpstarter/exporter/exporter.py	Updated instantiation of ControllerServiceStub by awaiting channel_factory() in multiple methods to accommodate its asynchronous behavior.

Sequence Diagram(s)

sequenceDiagram
    participant Caller as Client/Exporter
    participant CredFunc as ssl_channel_credentials
    participant Timeout as anyio.fail_after
    participant SSL as ssl.get_server_certificate

    Caller->>CredFunc: await ssl_channel_credentials(target, tls_config, timeout)
    CredFunc->>Timeout: enforce timeout (e.g., 5s)
    Timeout->>SSL: run_sync(ssl.get_server_certificate)
    SSL-->>Timeout: return certificate or trigger TimeoutError
    Timeout-->>CredFunc: certificate result (or error)
    CredFunc-->>Caller: return credentials or raise ConnectionError

Loading

Possibly related PRs

• Shell driver allows setting dangerous environment variables jumpstarter#359: Involves similar asynchronous modifications, specifically addressing the transformation of synchronous gRPC credential handling to an asynchronous model and updating related channel and stream functions.

Poem

I'm a hopping rabbit, light on my feet,
Async code now makes my heart skip a beat.
Credentials dance with time like a playful breeze,
Awaited flows make every process a breeze.
In a world of gRPC, I joyfully play,
Leaping through code in a bright, boppy way!

---

📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between dbc50d2 and 3907ba7.

📒 Files selected for processing (5)

• packages/jumpstarter/jumpstarter/common/grpc.py (2 hunks)
• packages/jumpstarter/jumpstarter/common/streams.py (1 hunks)
• packages/jumpstarter/jumpstarter/config/client.py (1 hunks)
• packages/jumpstarter/jumpstarter/config/exporter.py (1 hunks)
• packages/jumpstarter/jumpstarter/exporter/exporter.py (4 hunks)

🧰 Additional context used

🧬 Code Definitions (4)

packages/jumpstarter/jumpstarter/common/streams.py (1)

packages/jumpstarter/jumpstarter/common/grpc.py (1)

• ssl_channel_credentials (16-40)

packages/jumpstarter/jumpstarter/exporter/exporter.py (1)

packages/jumpstarter/jumpstarter/config/exporter.py (1)

• channel_factory (162-167)

packages/jumpstarter/jumpstarter/common/grpc.py (1)

packages/jumpstarter/jumpstarter/common/exceptions.py (2)

• ConfigurationError (35-38)
• ConnectionError (29-32)

packages/jumpstarter/jumpstarter/config/client.py (1)

packages/jumpstarter/jumpstarter/common/grpc.py (1)

• ssl_channel_credentials (16-40)

⏰ Context from checks skipped due to timeout of 90000ms (11)

• GitHub Check: Redirect rules - jumpstarter-docs
• GitHub Check: Header rules - jumpstarter-docs
• GitHub Check: Pages changed - jumpstarter-docs
• GitHub Check: pytest-matrix (3.12)
• GitHub Check: pytest-matrix (3.13)
• GitHub Check: pytest-matrix (3.11)
• GitHub Check: e2e
• GitHub Check: build-and-push-image (jumpstarter-dev/jumpstarter-utils Dockerfile.utils)
• GitHub Check: build-and-push-image (jumpstarter-dev/jumpstarter Dockerfile)
• GitHub Check: build-and-push-image (jumpstarter-dev/jumpstarter-dev .devfile/Containerfile)
• GitHub Check: build-and-push-image (jumpstarter-dev/jumpstarter-devspace .devfile/Containerfile.client)

🔇 Additional comments (13)

packages/jumpstarter/jumpstarter/common/streams.py (1)

37-37: Good update to handle the asynchronous credentials fetching

This change correctly adds the await keyword to properly handle the now asynchronous ssl_channel_credentials function. The function was converted to async to include proper timeout handling when obtaining server certificates.

packages/jumpstarter/jumpstarter/exporter/exporter.py (4)

32-32: Correctly updated to use await with channel_factory

The call to channel_factory now properly uses await since the function has been made asynchronous to support the new async ssl_channel_credentials.

---

50-50: Properly awaits asynchronous channel_factory

Good update to ensure the channel is properly instantiated in the asynchronous context.

---

79-79: Correctly awaits channel_factory in listen method

This change ensures that the channel is properly instantiated before being used for the listen operation.

---

116-116: Properly awaits asynchronous channel creation in status method

Consistent with other changes, this correctly awaits the channel_factory.

packages/jumpstarter/jumpstarter/config/exporter.py (2)

162-162: Good conversion to async function

This correctly updates the channel_factory function to be asynchronous, which is necessary since it now calls the async ssl_channel_credentials function.

---

164-164: Properly awaits the async ssl_channel_credentials function

This change correctly adds await to the call to ssl_channel_credentials, which has been converted to an asynchronous function to include proper timeout handling.

packages/jumpstarter/jumpstarter/config/client.py (1)

57-57: Correctly updated to await ssl_channel_credentials

This change properly awaits the now asynchronous ssl_channel_credentials function, which ensures that TLS certificate retrieval uses the new timeout mechanism.

packages/jumpstarter/jumpstarter/common/grpc.py (5)

10-11: Good addition of required async dependencies.

The imports from the anyio package are appropriate for implementing the asynchronous functionality needed for the SSL channel credentials function.

---

16-16: Function signature properly updated for async operation.

The function has been correctly converted to async by adding the async keyword, and the timeout parameter with a sensible default value of 5 seconds has been added.

---

26-27: Good implementation of timeout and async certificate retrieval.

Using fail_after to enforce a timeout and run_sync to handle the blocking SSL operation asynchronously is the right approach. This prevents the certificate retrieval from blocking the event loop while still allowing the operation to time out if it takes too long.

---

33-34: Proper error handling for timeout conditions.

Adding a specific handler for TimeoutError that converts it to a ConnectionError with a clear message is a good practice. This provides consistent error handling and meaningful error messages to callers.

---

16-40:

Details

✅ Verification successful

Verify that all callers of this function have been updated.

Since ssl_channel_credentials is now an async function, all call sites must use await when calling it.

---

🏁 Script executed:

#!/bin/bash
# Search for all direct calls to ssl_channel_credentials
# We should see that all calls now use await

echo "Checking for calls to ssl_channel_credentials:"
rg -p "ssl_channel_credentials\(" --no-heading | grep -v "async def ssl_channel_credentials"

echo -e "\nVerifying all calls are awaited:"
rg -p "await ssl_channel_credentials\(" --no-heading

Length of output: 1414

---

All call sites using ssl_channel_credentials now properly await its result.

The verification confirms that the async function is correctly awaited in:

• packages/jumpstarter/jumpstarter/common/streams.py (line 37)
• packages/jumpstarter/jumpstarter/config/exporter.py (line 164)
• packages/jumpstarter/jumpstarter/config/client.py (line 57)

There are no issues left in the callers.

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