Sending Notifications of Failed Health Checks in Oracle Cloud Infrastructure

Notifications service is a broadcast message delivery based in publish-subscribe mechanism. Health Checks service provides users with high frequency external monitoring to determine the availability and performance of any publicly facing service, including hosted websites, API endpoints, or externally facing load balancers.

One: Create a Health Check

Click the HealthChecks menu option located in the Monitoring section of the OCI dashboard left menu and then in the [Create Health Check] button:

Write down the target such as http://www.oracle.com, select one or more vantage points from the list, protocol, port, path, etc…

Two: Consult the Health Check History

Three: Create Notification Stuff

Four: Create the job in DevCS

For the purpose of executing periodically a query searching for failed checks we are utilising Developer Cloud Service the same way explained in this post. In this particular use case we are using the script located in github here.

We must create 3 parameters named healthcheck, notificationtopic and count the same way like explained in the mentioned post, each one with the value as follows:

healthcheck: is the OCID of the healthcheck

notificationtopic: is the OCID of the notification

count: the number equal or greater the result of the division between the job frequency and the healthcheck frequency. For instance, if the healthcheck frequency is 5 minutes and the job frequency is gonna be 15 minutes, count should be >= 3 (15/5)

Then in the shell script step put the following:

git clone https://github.com/javiermugueta/oci-healthcheck-notifications
cd oci-healthcheck-notifications
chmod 700 ohcm.sh
./ohcm.sh ${healthcheck} ${notificationtopic} ${count}

Five: Plan the job and see what happens

As explained in the mentioned post, plan the execution of the job with the frequency you decided and used for the formula in step four.

That’s all, hope it helps! 🙂