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Clair Load Testing

Tool to run HTTP benchmarking tests on Clair v4.

Prerequisites

Running on openshift cluster

  • A running instance of Clair (to test).

Running on local machine (Optional)

Installation

make

NOTE: You might want to add sudo to this step as it involves creating clair-load-test binary in your $PATH as well as uploading it to the remote image registry.

Usage

Load Phase

Run the assets/image_load.sh script with the required parameters to create tags in the repo which can be used for the testing later.

Example

START=1 END=10000 LAYERS=5 IMAGES="quay.io/clair-load-test/mysql:8.0.25" LOAD_REPO="quay.io/vchalla/clair-load-test" RATE=20 bash image_load.sh

This will create 1 to 10000 tags of images specified in the load repo which will be helpful for our testing later.

NOTE: One-time Activity. Use it if you want to specify either of CLAIR_TEST_REPO_PREFIX/testrepoprefix options in the Run phase.

Run Phase

Usage on openshift platform

Sample Clair App : Deploy assets/clair-setup.yaml on to your openshift cluster for a sample clair app or else have your own clair app up and running.

Next in order to trigger the tests, deploy assets/clair-config.yaml on to your openshift cluster.

Envs

  • CLAIR_TEST_HOST - String indicating clair host to perform testing.
  • CLAIR_TEST_CONTAINERS - String with comma separated list of conatiner images.
  • CLAIR_TEST_RUNID(Optional) - String specifying the desired RUNID of the test run.
  • CLAIR_TEST_PSK - Psk string which can be found at ~/clair/config.yaml in the clair app pod.
  • CLAIR_TEST_REPO_PREFIX - String indicating comma separated test repo prefixes. Based on the hitsize specified and the number of images that are actually present with the given prefixes, our tool tries to fetch maximum number of manifests to load test.
  • CLAIR_TEST_ES_HOST - String indicating the ES instance host.
  • CLAIR_TEST_ES_PORT - Indicates the port number of ES instance.
  • CLAIR_TEST_ES_INDEX - String indicating the ES index to upload the results.
  • CLAIR_TEST_INDEX_REPORT_DELETE - Boolean flag to indicate the index reports deletion at the end of the test run.
  • CLAIR_TEST_HIT_SIZE - Indicates the total amount of requests to hit the system with.
  • CLAIR_TEST_LAYERS - One among [-1, 5, 10, 15, 20, 25, 30, 35, 40] to pull image manifests with those many layers for testing. (-1) simulates a mixed workload that runs on manifests each with random number of layers. Valid only when pulling manifests from remote repository (i.e. using CLAIR_TEST_REPO_PREFIX) instead of using CLAIR_TEST_CONTAINERS option.
  • CLAIR_TEST_CONCURRENCY - Indicates the rate(concurrency) at which the requests hits must happen in parallel.

Once triggered it will create a job in the specified namespace and will start running the tests with above mentioned values.

Example Usage

Create a yaml similar to assets/clair-config.yaml and apply it to a desired namespace in your openshift cluster.

oc apply -f ~/assets/clair-config.yaml

Once deployed you should be able to see the details of the run in the pod logs with results getting logged and finally indexed to the target elastic search index.

Usage on Local Machine

NAME:
   clair-load-test - A command-line tool for stress testing clair v4.

USAGE:
   clair-load-test [global options] command [command options] [arguments...]

VERSION:
   0.0.1

DESCRIPTION:
   A command-line tool for stress testing clair v4.

COMMANDS:
   report       clair-load-test report
   createtoken  createtoken --key sdfvevefr==
   help, h      Shows a list of commands or help for one command

GLOBAL OPTIONS:
   -D             print debugging logs (default: false)
   -W             quieter log output (default: false)
   --help, -h     show help
   --version, -v  print the version

Report

NAME:
   clair-load-test report - clair-load-test report

USAGE:
   clair-load-test report [command options] [arguments...]

DESCRIPTION:
   request reports for named containers

OPTIONS:
   --host value            --host localhost:6060/ (default: "http://localhost:6060/") [$CLAIR_TEST_HOST]
   --runid value           --runid f519d9b2-aa62-44ab-9ce8-4156b712f6d2 (default: "14484a83-abba-483c-9b66-3b5ce93b4088") [$CLAIR_TEST_RUNID]
   --containers value      --containers ubuntu:latest,mysql:latest [$CLAIR_TEST_CONTAINERS]
   --testrepoprefix value  --testrepoprefix quay.io/vchalla/clair-load-test:mysql_8.0.25,quay.io/quay-qetest/clair-load-test:hadoop_latest [$CLAIR_TEST_REPO_PREFIX]
   --psk value             --psk secretkey [$CLAIR_TEST_PSK]
   --eshost value          --eshost eshosturl [$CLAIR_TEST_ES_HOST]
   --esport value          --esport esport [$CLAIR_TEST_ES_PORT]
   --esindex value         --esindex esindex [$CLAIR_TEST_ES_INDEX]
   --delete                --delete (default: false) [$CLAIR_TEST_INDEX_REPORT_DELETE]
   --hitsize value         --hitsize 100 (default: 25) [$CLAIR_TEST_HIT_SIZE]
   --layers value          --layers 10 (default: 5) [$CLAIR_TEST_LAYERS]
   --concurrency value     --concurrency 50 (default: 10) [$CLAIR_TEST_CONCURRENCY]
   --help, -h              show help

Example Usage

Processes the below list of containers and executes tests at rate of 10rps with 25 HTTP requests in total.

clair-load-test -D report --containers="quay.io/clair-load-test/ubuntu:xenial,quay.io/clair-load-test/ubuntu:focal,quay.io/clair-load-test/ubuntu:impish,quay.io/clair-load-test/ubuntu:trusty" --hitsize=25 --concurrency=10 --delete=true --host=http://example-registry-clair-app-quay-enterprise.apps.vchalla-clair-test.perfscale.devcluster.openshift.com --psk=RUZMTEVxMFI2QmVTRnhhNG5VUTF0ZVJZb1hLeTYwY20= --eshost="ES_URL" --esport="443" --esindex="clair-test-index"

Gets the list of manifests from the test repo(created during load phase) which is specified through the --testrepoprefix option and runs the test at a rate of 10rps with 25 requests in total.

clair-load-test -D report --hitsize=25 --layers=5 --concurrency=10 --delete=true --host=http://example-registry-clair-app-quay-enterprise.apps.vchalla-clair-test.perfscale.devcluster.openshift.com --psk=RUZMTEVxMFI2QmVTRnhhNG5VUTF0ZVJZb1hLeTYwY20= --testrepoprefix="quay.io/clair-load-test/clair-load-test:ubuntu_latest,quay.io/quay-qetest/clair-load-test:hadoop_latest" --eshost="ES_URL" --esport="443" --esindex="clair-test-index"

NOTE: Both --containers and --testrepoprefix options are mutually exclusive.

Profiling

Application Level Profiling

Inorder to perform application level profiling we use pyroscope. To install pyroscope onto your cluster, deploy assets/pyroscope-server.yaml. Now wait until the pods are up and running in the pyroscope namespace. For other installation methods please refer this.
Once pyroscope is ready, we should be able to logon to the pyroscope route in the pyroscope namespace and view the application level profiling data using the tags applied as filters. Please refer to this tutorial and live demo for more details on integration.

System Level Profiling

Inorder to perform system level profiling we use parca. To install parca onto your cluster, deploy assets/parca-server.yaml and assets/parca-agent.yaml in sequence. Now wait until the pods are up and running in the parca namespace. For other installation method please refer this.
Once parca is ready, we should be able to logon to the parca route in the parca namespace and view the system level profiling data.

PostgresDB Profiling

In order to perform low overhead database profiling we will be using pgBadger. Below are the steps to do profiling on postgresDB.

  • Step 1: Login to the postgres DB and modify the postgres.conf in /var/lib/postgresql/data/ with below flags (or can be modified according to our own use case).
log_checkpoints = on
log_connections = on
log_disconnections = on
log_lock_waits = on
log_temp_files = 0
log_autovacuum_min_duration = 0
log_error_verbosity = default
log_destination = 'stderr'
logging_collector = on
log_rotation_age = 1d
log_rotation_size = 0
log_truncate_on_rotation = on
log_min_duration_statement = 0
log_min_messages = debug1
  • Step 2: Once after modifying the config restart the db using the below command
pg_ctl restart -D /var/lib/postgresql/data

  • Step 3: Now we should be able to find the logs in /var/lib/postgresql/data/log/. Copy those logs to the location where pgBadger binary is installed.

  • Step 4: Then execute the below command to process those logs and get an html report. For more details on usage of pgBadger, refer here.

pgbadger -j 8 ~/output/postgresql-2023-06-18_141703.log -o /home/vchalla/output/output.html --format html

NOTE: It is suggested to disable logs collector once we do the profiling to avoid overhead created by logs files getting accumulating in the DB.