OTLP GRPC Exporter failing to connect, preventing trace data export

[kadhamecha-conga]

hi,

GRPC Exporter is failing to establish a connection with the configured endpoint, resulting in the inability to export trace data.

[Error] File: /tmp/build/opentelemetry-cpp/exporters/otlp/src/otlp_grpc_exporter.cc:66 [OTLP TRACE GRPC Exporter] Export() failed with status_code: "UNAVAILABLE" error_message: "failed to connect to all addresses; last error: UNKNOWN: ipv4:x.x.x.x:443: connection attempt timed out before receiving SETTINGS frame"

helm.sh/chart : ingress-nginx-4.11.3
app.kubernetes.io/version : 1.11.2

nginx otel config :

allow-snippet-annotations: 'true'
client-header-buffer-size: 128k
enable-opentelemetry: 'true'
hide-headers: server
hsts: 'true'
hsts-include-subdomains: 'true'
hsts-max-age: '31536000'
large-client-header-buffers: 8 128k
load-balance: ewma
opentelemetry-operation-name: HTTP $request_method $service_name $uri
opentelemetry-trust-incoming-span: 'true'
otel-max-export-batch-size: '512'
otel-max-queuesize: '2048'
otel-sampler: AlwaysOn
otel-sampler-parent-based: 'true'
otel-sampler-ratio: '1.0'
otel-schedule-delay-millis: '5000'
otel-service-name: nginx-ingress
otlp-collector-host: "signals.test.com"
otlp-collector-port: '443'
proxy-body-size: 100m
proxy-buffer-size: 128k
proxy-buffering: 'on'
proxy-buffers-number: '4'
proxy-connect-timeout: '120'
proxy-headers-hash-bucket-size: '256'
proxy-headers-hash-max-size: '1024'
proxy-read-timeout: '3600'
proxy-send-timeout: '3600'
server-names-hash-bucket-size: '256'
server-names-hash-max-size: '1024'
use-forwarded-headers: 'true'
use-http2: 'true'

thanks,

[k8s-ci-robot]

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[longwuyuan]

/assign @esigo

[kadhamecha-conga]

hi @esigo , is grpc with TLS supported with nginx opentelemetry ?