Kevin Li created FLINK-29572:
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Summary: Flink Task Manager skip loopback interface for resource
manager registration
Key: FLINK-29572
URL: https://issues.apache.org/jira/browse/FLINK-29572
Project: Flink
Issue Type: Improvement
Components: API / Core
Affects Versions: 1.15.2
Environment: Flink 1.15.2
Kubernetes with Istio Proxy
Reporter: Kevin Li
Currently Flink Task Manager use different local interface to bind to connect
to Resource Manager. First one is Loopback interface. Normally if Job Manager
is running on remote host/container, using loopback interface to connect will
fail and it will pick up correct IP address.
However, if Task Manager is running with some proxy, loopback interface can
connect to remote host as well. This will result 127.0.0.1 reported to Resource
Manager during registration, even Job Manager/Resource Manager runs on remote
host, and problem will happen. For us, only one Task Manager can register in
this case.
I suggest adding configuration to skip Loopback interface check if we know
Job/Resource Manager is running on remote host/container.
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