Communication: Simplify if statement for interface bootup #788
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WalkthroughAdjusts interface_bootup hostname selection: removes the Darwin-specific default that favored localhost, and introduces a non-Darwin default setting hostname_localhost to False. This causes --host with the actual hostname to be appended more broadly, including on macOS. No public APIs changed; other logic remains as before. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
participant Caller
participant interface_bootup
participant System as sys.platform
participant Hostname as socket.gethostname
Caller->>interface_bootup: interface_bootup(hostname_localhost=None, ...)
interface_bootup->>System: check platform
alt hostname_localhost is None
alt sys.platform != "darwin" (New)
Note right of interface_bootup: Set hostname_localhost = False
else sys.platform == "darwin"
Note right of interface_bootup: Leave as None/unchanged
end
end
alt not hostname_localhost
interface_bootup->>Hostname: resolve actual hostname
interface_bootup-->>Caller: include --host <hostname>
else
Note right of interface_bootup: Use localhost (no --host)
interface_bootup-->>Caller: proceed with localhost
end
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes Poem
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## main #788 +/- ##
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Actionable comments posted: 0
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⚠️ Outside diff range comments (1)
executorlib/standalone/interactive/communication.py (1)
148-155: Docstring contradicts behavior and is confusing; clarify semantics and macOS note.The current text suggests macOS requires
hostname_localhost=True, but the code defaults to hostname-based on macOS as well. Also, usinglocalhostcannot work for multi-node allocations. Please align the documentation.Apply:
- hostname_localhost (boolean): use localhost instead of the hostname to establish the zmq connection. In the - context of an HPC cluster this essential to be able to communicate to an - Executor running on a different compute node within the same allocation. And - in principle any computer should be able to resolve that their own hostname - points to the same address as localhost. Still MacOS >= 12 seems to disable - this look up for security reasons. So on MacOS it is required to set this - option to true + hostname_localhost (bool | None): + If True, force localhost (127.0.0.1). + If False, pass the machine hostname via ``--host``. + If None (default), it is treated as False on all platforms. + Notes: + - Use True only when the client runs on the same node as the server. For multi-node allocations + (MPI/SLURM/Flux), leave this False or provide an explicit host so workers on other nodes can reach it. + - On macOS 12+, short hostnames may not resolve to loopback by design. Using the hostname (default) + is correct; set this to True only to force loopback for local-only setups.
🧹 Nitpick comments (1)
executorlib/standalone/interactive/communication.py (1)
165-168: Consider robustness of hostname value across clusters.Some clusters require FQDN or an IP to be reachable from other nodes. Using
socket.getfqdn()(or resolving to IP viasocket.gethostbyname(socket.getfqdn())) can be more robust thangethostname().Example:
-from socket import gethostname +import socket ... - gethostname(), + socket.getfqdn(),If name resolution is flaky, consider resolving to an IP instead:
host = socket.gethostbyname(socket.getfqdn()) command_lst += ["--host", host]
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executorlib/standalone/interactive/communication.py(1 hunks)
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- GitHub Check: unittest_openmpi (ubuntu-latest, 3.11)
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🔇 Additional comments (1)
executorlib/standalone/interactive/communication.py (1)
162-168: The scripts will inspect the file context and pinpoint howhostname_localhostis defined and used.━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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