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Envoy debug logs the fact that it is not able to establish a connection with the management server every time it attempts a connection.
connected_state statistic provides a signal for monitoring this behavior.
Management Server has a statistics tree rooted at control_plane. with the following statistics:
The following statistics are generated for all subscriptions.
Name | Type | Description |
|---|---|---|
config_reload | Counter | Total API fetches that resulted in a config reload due to a different config |
init_fetch_timeout | Counter | Total |
update_attempt | Counter | Total API fetches attempted |
update_success | Counter | |
update_failure | Counter | Total API fetches that failed because of network errors |
update_rejected | Counter | Total API fetches that failed because of schema/validation errors |
update_time | Gauge | Timestamp of the last successful API fetch attempt as milliseconds since the epoch. Refreshed even after a trivial configuration reload that contained no configuration changes. |
version | Gauge | Hash of the contents from the last successful API fetch |
control_plane.connected_state | Gauge | A boolean (1 for connected and 0 for disconnected) that indicates the current connection state with management server |
