Lab - OPEN POLICY AGENT (OPA)

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Solutions for Lab - OPA:

OPA stands for Open Policy Agent.

Install and run the latest OPA on the system in the background.

Update VERSION below with the latest version available in the release page
$ export VERSION=v0.27.1
$ curl -L -o opa https://github.com/open-policy-agent/opa/releases/download/${VERSION}/opa_linux_amd64
$ chmod 755 ./opa
$ ./opa run -s &

8181 is the default port on which OPA runs.
Rego is the language used to write policies in OPA.

Fix the error in the policy given at /root/example.rego

$ vi /root/example.rego
Set "default allow = false"
Run the below command to test policy
$ ./opa test example.rego

Load policy /root/sample.rego to OPA with the name samplepolicy.

Run Below command to import sample.rego in OPA
$ curl -X PUT --data-binary @sample.rego http://localhost:8181/v1/policies/samplepolicy