Add ratelimiter for fault injection handlers

[harishxr]

Summary

This PR adds a tollbooth ratelimiter to the Fault Injection handlers, enforcing a request limit to control how frequently fault injection operations can be triggered.

Implementation details

• createRateLimiter is used to create a new tollbooth rate limiter with rate limit of 0.2 ( 1 request per 5 seconds).
• The rate limiter is then applied to network fault injection endpoints such as blackhole port faults, latency faults and packet loss faults.

  Testing

• Agent with these changes was built and a standard task was launched using the agent with rate limiter.
• Accessed the task container and called the Fault Injection APIs back to back

  
  # curl -X GET $ECS_AGENT_URI/fault/v1/network-blackhole-port -d '{"Port":123}' -v

• Trying 169.254.170.2:80...
• Connected to 169.254.170.2 (169.254.170.2) port 80 (#0)

  GET /api/4e37f57c-c1c8-48ca-927f-0662dfa78094/fault/v1/network-blackhole-port HTTP/1.1 Host: 169.254.170.2 User-Agent: curl/7.88.1 Accept: / Content-Length: 12 Content-Type: application/x-www-form-urlencoded

  < HTTP/1.1 400 Bad Request < Content-Type: application/json < X-Rate-Limit-Duration: 1 < X-Rate-Limit-Duration: 1 < X-Rate-Limit-Limit: 40.00 < X-Rate-Limit-Limit: 0.20 < X-Rate-Limit-Request-Forwarded-For: < X-Rate-Limit-Request-Forwarded-For: < X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35562 < X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35562 < Date: Mon, 16 Sep 2024 18:20:41 GMT < Content-Length: 50 <

• Connection #0 to host 169.254.170.2 left intact {"Error":"required parameter Protocol is missing"}

  curl -X GET $ECS_AGENT_URI/fault/v1/network-blackhole-port -d '{"Port":123}' -v

• Trying 169.254.170.2:80...
• Connected to 169.254.170.2 (169.254.170.2) port 80 (#0)

  GET /api/4e37f57c-c1c8-48ca-927f-0662dfa78094/fault/v1/network-blackhole-port HTTP/1.1 Host: 169.254.170.2 User-Agent: curl/7.88.1 Accept: / Content-Length: 12 Content-Type: application/x-www-form-urlencoded

  < HTTP/1.1 429 Too Many Requests < Content-Type: text/plain; charset=utf-8 < X-Rate-Limit-Duration: 1 < X-Rate-Limit-Duration: 1 < X-Rate-Limit-Limit: 40.00 < X-Rate-Limit-Limit: 0.20 < X-Rate-Limit-Request-Forwarded-For: < X-Rate-Limit-Request-Forwarded-For: < X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35568 < X-Rate-Limit-Request-Remote-Addr: 172.17.0.2:35568 < Date: Mon, 16 Sep 2024 18:20:43 GMT < Content-Length: 38 <

• Connection #0 to host 169.254.170.2 left intact You have reached maximum request limit

• As seen from the test results, the second request done in succession get blocked with a 429 error.
• New TestRateLimiterIntegration integration test has been added as well to ensure the rate limiter works as expected.

New tests cover the changes: yes

Description for the changelog

Add ratelimiter for fault injection handlers

Additional Information

Does this PR include breaking model changes? If so, Have you added transformation functions?

**Does this PR include the addition of new environment variables in the README?**

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.