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1. Make sure already setup a site (here use a demo site named "sandbox")
2. Install "Topology Health Check" app in eagle server
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3. Configure Application settings
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4. Ensure a kafka topic named topology_health_check (In current guide, it should be topology_health_check 
5. Click "Install" button then you will see the TOPOLOGY_HEALTH_CHECK_STREAM_{SITE_ID} in StreamsImage Removed
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Usage

Define Health Check Alert Policy

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1. Go to "Define Policy"
2. Select TOPOLOGY_HEALTH_CHECK related streams

3. Define SQL-Like policy, for example 

   Code Block
   language sql
   from TOPOLOGY_HEALTH_CHECK_STREAM_SANDBOX[status=='dead'] select * insert into topology_health_check_stream_out;

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