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Documentation/upgrades: highlight "go-grpc-prometheus" change

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Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
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Gyu-Ho Lee 2017-11-10 10:58:00 -08:00
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Documentation/upgrades/upgrade_3_1.md
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@ -8,6 +8,15 @@ Before [starting an upgrade](#upgrade-procedure), read through the rest of this
### Upgrade checklists
#### Monitoring
Following metrics from v3.0.x have been deprecated in favor of [go-grpc-prometheus](https://github.com/grpc-ecosystem/go-grpc-prometheus):
- `etcd_grpc_requests_total`
- `etcd_grpc_requests_failed_total`
- `etcd_grpc_active_streams`
- `etcd_grpc_unary_requests_duration_seconds`
#### Upgrade requirements
To upgrade an existing etcd deployment to 3.1, the running cluster must be 3.0 or greater. If it's before 3.0, please [upgrade to 3.0](upgrade_3_0.md) before upgrading to 3.1.