3.3. Upgrade Ambari Metrics

Upgrade to Ambari 2.1 and perform needed post-upgrade checks. Make sure all services are up and healthy.
Make sure Ambari Metrics service is stopped. From Ambari Web, browse to Services > Ambari Metrics and select Stop from the Service Actions menu.

On every host in your cluster running a Metrics Monitor, run the following commands:

For RHEL/CentOS/Oracle Linux:

yum clean all

yum upgrade ambari-metrics-monitor ambari-metrics-hadoop-sink

For SLES:

zypper clean

zypper up ambari-metrics-monitor ambari-metrics-hadoop-sink

For Ubuntu/Debian:

apt-get clean all

apt-get update

apt-get install ambari-metrics-assembly

Execute the following command on all hosts running the Metrics Collector:
For RHEL/CentOS/Oracle Linux:
```
yum upgrade ambari-metrics-collector
```
For SLES:
```
zypper up ambari-metrics-collector
```
For Ubuntu/Debian:
```
apt-get install ambari-metrics-assembly
```
Start Ambari Metrics Service. From Ambari Web, browse to Services > Ambari Metrics and select Start from the Service Actions menu.
Updated Ambari Metrics Sink jars will be installed on all hosts. You must restart each service to pick up the latest sink implementations.
(For example: HDFS, YARN, Kafka, HBase, Flume, Storm)