Burnell is a proxy in a Pulsar cluster. It offers the following features:
- Generate Pulsar JWT that is compatible with Pulsar Java based authentication and authorization
- Authentication and authorization based on Pulsar JWT
- Proxy the entire set of Pulsar Admin REST API
- Tenant based authorization over Pulsar Admin REST API
- Expose tenant Prometheus metrics on the brokers
- Interface to query function logs
- Provides statistics with pagination
- Pulsar Beam webhook and topic management REST API that enforces tenant based authorization
- Tenants and tenant's namespace usage metering, total bytes and message in and out
- Initializer mode to configure Pulsar Kubernetes cluster TLS keys and JWT
- Repair Pulsar Kubernetes cluster TLS keys and JWT
- It provides Pulsar websocket proxy that sets token in the http parameter to http header
burnell -mode proxy
burnell -mode init
burnell -mode healer
The default process mode is proxy
To generate a JWT token, a super user role's JWT must be specified in the Authorization header as Bearer token in the GET method with this route.
/subject/{user-subject}
Permitted characters for user subject are alphanumeric and hyphen.
Token signing method and expiry duration can be passed as query parameters. The default settings are RS256 and no expiry.
/subject/{user-subject}?exp=<duration>&alg=<signMethod>
The supported duration is d, y, and ns, us, µs, ms, s, m, h defined by Go time package The supported signing method is specified here
Generated JWT can be validated by Pulsar under the same encryption key scheme.
It provides a rolling log crawler from the function worker.
By default, the endpoint will return the last few lines of the latest log.
/function-logs/{tenant}/{namespace}/{function-name}
/function-logs/{tenant}/{namespace}/{function-name}/{instance}
Default instance is 0 if not specified.
Example -
/function-logs/ming-luo/namespace2/for-monitor-function
To retrieve earlier logs or newer logs, use query parameters backwardpos or forwardpos that indicates the byte index in the log file. These values can be obtained from the response body of the last query, under these attributes BackwardPosition and ForwardPosition. We run an algorithm to return a few complete lines. It is important to use the exact positions in the response body to have those complete log lines. An arbitary position will result truncated logs.
/function-logs/{tenant}/{namespace}/{function-name}?backwardpos=45000
It is client's responsibility to keep track of the log file traverse position in both backward and forward position. The number must be a positive number. 0 value of backwardpos or forwardpos resets the backwardpos to EOF of the log file that displays the last few lines.
Since the algorithm always returns a few complete logs, the payload size can vary. Usually the size ranges from one or two kilobytes.
{
"BackwardPosition": 47987,
"ForwardPosition": 49427,
"Logs": "[2020-03-30 12:31:57 +0000] [ERROR] log.py: Traceback (most recent call last):\n[2020-03-30 12:31:57 +0000] [ERROR] log.py: File \"/pulsar/instances/python-instance/python_instance_main.py\", line 211, in <module>\n[2020-03-30 12:31:57 +0000] [ERROR] log.py: main()\n[2020-03-30 12:31:57 +0000] [ERROR] log.py: File \"/pulsar/instances/python-instance/python_instance_main.py\", line 192, in main\n[2020-03-30 12:31:57 +0000] [ERROR] log.py: pyinstance.run()\n[2020-03-30 12:31:57 +0000] [ERROR] log.py: File \"/pulsar/instances/python-instance/python_instance.py\", line 189, in run\n[2020-03-30 12:31:57 +0000] [ERROR] log.py: **consumer_args\n"
}
To troubleshoot function instance and its worker Id mapping, the function-status endpoint offers insights of such mapping and function status.
/function-status/{tenant}/{namespace}/{function-name}
METHOD: GET
/stats/topics/{tenant}?limit=10&offset=0
A list of required topics can be specified in the request body. This feature is useful since this endpoint usually retrieves topics from a local cache that has 5 seconds polling interval, the mandatory list will directly query these topics against the broker admin REST endpoint.
{"tenant":"ming-luo","sessionId":"reserverd for snapshot iteration","offset":1,"total":1,"data":{"persistent://ming-luo/namespace2/test-topic3":{"averageMsgSize":0,"backlogSize":0,"msgRateIn":0,"msgRateOut":0,"msgThroughputIn":0,"msgThroughputOut":0,"pendingAddEntriesCount":0,"producerCount":0,"publishers":[],"replication":{},"storageSize":0,"subscriptions":{"mysub":{"consumers":[],"msgBacklog":0,"msgRateExpired":0,"msgRateOut":0,"msgRateRedeliver":0,"msgThroughputOut":0,"numberOfEntriesSinceFirstNotAckedMessage":1,"totalNonContiguousDeletedMessagesRange":0,"type":"Exclusive"}}}}}
/admin/v2/topics/{tenant}
Returns all tenants' usage metering data including the number of messages and total bytes in and out, and backlog size Superuser token is required
/tenantsusage
Returns individual namespaces' usage metering data including the number of messages and total bytes in and out, and backlog size, under a tenant Superuser token or tenant token is required
/namespacesusage/{tenant}
It provides tenant policy management. Tenant policy specifies message retention policy, feature codes, and limits for namespaces, producers and consumers.
/k/tenant/{tenant}
{tenant}, tenant name, must be specified for all REST calls.
http.MethodGet, http.MethodDelete, http.MethodPost
-H "Authorization: Bearer $SUPERROLE_TOKEN"
Superrole token is required.
-X POST
-H "Authorization: Bearer $SUPERROLE_TOKEN" \
--data '{"PlanType": "free"}'
Example:
$ curl -v -X POST -H "Authorization: Bearer $MY_TOKEN" -d '{"planType": "free"}' "http://localhost:8964/k/tenant/ming-luo"
{"name":"ming-luo","tenantStatus":1,"org":"","users":"","planType":"free","updatedAt":"2020-04-17T13:39:09.315634076-04:00","policy":{"name":"free","numOfTopics":5,"numOfNamespaces":1,"messageHourRetention":48,"messageRetention":172800000000000,"numofProducers":3,"numOfConsumers":5,"functions":1,"featureCodes":""},"audit":"initial creation,"}
Update can upgrade or downgrade plan or specify individual plan attributes and feature code.
policy.messageHourRetention (integer) is the data retention period. policy.messageRetention is reserved internally for Golang retention in nano-seconds.
-X POST
-H "Authorization: Bearer $SUPERROLE_TOKEN" \
--data '{"PlanType": "free", "policy":{"name":"free","numOfTopics":5,"numOfNamespaces":1,"messageRetention":172800000000000,"numofProducers":3,"numOfConsumers":5,"functions":3,"featureCodes":"broker-metrics"}}'
$ curl -v -X POST -H "Authorization: Bearer $MY_TOKEN" -d '{"planType": "free", "org": "", "users": "", policy":{"name":"free","numOfTopics":5,"numOfNamespaces":1,"messageHourRetention":120,"numofProducers":3,"numOfConsumers":5,"functions":5,"featureCodes":1},"audit":"enable prometheus metrics"}' "http://localhost:8964/k/tenant/ming-luo"
{"name":"ming-luo","tenantStatus":1,"org":"","users":"","planType":"free","updatedAt":"2020-04-17T13:44:40.494262281-04:00","policy":{"name":"free","numOfTopics":5,"numOfNamespaces":1,"messageHourRetention":120,"messageRetention":432000000000000,"numofProducers":3,"numOfConsumers":5,"functions":5,"featureCodes":"broker-metrics"},"audit":"initial creation,,enable prometheus metrics"}
-X GET
-H "Authorization: Bearer $SUPERROLE_TOKEN" \
Example:
$ curl -H "Authorization: Bearer $MY_TOKEN" "http://localhost:8964/k/tenant/ming-luo"
{"name":"ming-luo","tenantStatus":1,"org":"","users":"","planType":"free","updatedAt":"2020-04-17T13:39:09.315634076-04:00","policy":{"name":"free","numOfTopics":5,"numOfNamespaces":1,"messageHourRetention":48,"messageRetention":172800000000000,"numofProducers":3,"numOfConsumers":5,"functions":1,"featureCodes":""},"audit":"initial creation,"}
-X DELETE
-H "Authorization: Bearer $SUPERROLE_TOKEN" \
Example:
$ curl -X DELETE -H "Authorization: Bearer $MY_TOKEN" "http://localhost:8964/k/tenant/ming-luo"
{"name":"ming-luo","tenantStatus":1,"org":"","users":"","planType":"free","updatedAt":"2020-04-17T13:39:09.315634076-04:00","policy":{"name":"free","numOfTopics":5,"numOfNamespaces":1,"messageHourRetention":48,"messageRetention":172800000000000,"numofProducers":3,"numOfConsumers":5,"functions":1,"featureCodes":""},"audit":"initial creation,"}
Expose \pulsarmetrics endpoint with Pulsar prometheus metrics pertaining to the tenant. The tenant is identified based on the Authorization token.
If a superuser token is supplied, all the federated prometheus metrics will be returned.
Scrape config offers honor_labels: true to honor the existing labels. It is optional because exported_ labels can be used to identify metrics. But, the scrape job should set honor_timestamps: true to retain the original timestamp. Here is the detail scrape config description
Pulsar Admin REST API is mapped with the exact same routes under \admin\v2 and admin\v3 for functions, sinks, and sources. The exception is \broker-stats.
/admin/v2/broker-stats response aggregates all brokers' statistics. It returns brokers in the order of broker name, therefore it individual broker json object similar to pagination.
-X GET
-H "Authorization: Bearer $SUPERROLE_TOKEN"
"https://<pulsar proxy server fqdn>:8964/admin/v2/broker-stats/metrics?limit=2&offset=0"
limit=0 will return all brokers in a single call.
Without limit and offset query parameters, it will return the very first broker in the order broker's alphanumeric order.
The new offset and total will be returned in the response body.
{"total":1,"offset":1,"data":[{"broker":"10.244.1.221:8080","data":[{"...
docker build -t burnell .
docker build -t burnell-logcollector -f ./dockerfiles/logserver/Dockerfile .
docker run --rm -it -p 4042:4042 -e "LogServerPort=:4042" --name burnell-logcollector burnell-logcollector:latest
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