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https://github.com/seatgeek/nomad-firehose
Firehose all nomad job, allocation, nodes and evaluations changes to rabbitmq, kinesis or stdout
https://github.com/seatgeek/nomad-firehose
consul firehose hashicorp hashicorp-nomad nomad rabbitmq
Last synced: 3 months ago
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Firehose all nomad job, allocation, nodes and evaluations changes to rabbitmq, kinesis or stdout
- Host: GitHub
- URL: https://github.com/seatgeek/nomad-firehose
- Owner: seatgeek
- License: bsd-3-clause
- Created: 2017-07-12T08:48:16.000Z (almost 7 years ago)
- Default Branch: master
- Last Pushed: 2020-09-03T16:44:35.000Z (almost 4 years ago)
- Last Synced: 2024-04-13T17:08:45.712Z (3 months ago)
- Topics: consul, firehose, hashicorp, hashicorp-nomad, nomad, rabbitmq
- Language: Go
- Homepage:
- Size: 211 KB
- Stars: 115
- Watchers: 13
- Forks: 33
- Open Issues: 20
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-nomad - seatgeek/nomad-firehose - Go binary that "tails" API endpoints and emit messages for each changed resource to RabbitMQ, AWS kinesis or stdout. (Ops tools)
README
# nomad-firehose
`nomad-firehose` is a tool meant to enable teams to quickly build logic around nomad task events without hooking into Nomad API.
## Running
The project has build artifacts for Linux, Darwin and Windows in the [GitHub releases tab](https://github.com/seatgeek/nomad-firehose/releases).
A Docker container is also provided at [seatgeek/nomad-firehose](https://hub.docker.com/r/seatgeek/nomad-firehose/tags/)
## Requirements
- Go 1.11
## Building
To build a binary, run the following
```shell
# get this repo
go get github.com/seatgeek/nomad-firehose
# go to the repo directory
cd $GOPATH/src/github.com/seatgeek/nomad-firehose
# build the `nomad-firehose` binary
make build
```
This will create a `nomad-firehose` binary in your `$GOPATH/bin` directory.
## Configuration
Any `NOMAD_*` env that the native `nomad` CLI tool supports are supported by this tool.
Any `CONSUL_*` env that the native `consul` CLI tool supports are supported by this tool.
The most basic requirement is `export NOMAD_ADDR=http://:4646` and `export CONSUL_HTTP_ADDR=:8500`.
### Consul
`nomad-firehose` will use Consul to maintain leader-ship and store last event time processed (saved on quit or every 10s).
This mean you can run more than 1 process of each firehose, and only one will actually do any work.
Saving the last event time mean that restarting the process won't firehose all old changes to your sink, reducing duplicated events.
By default, the Consul lock is maintained in KV at `nomad-firehose/${type}.lock` and the last event time is stored in KV at `nomad-firehose/${type}.value`. You can change the prefix from `nomad-firehose` by setting `NOMAD_FIREHOSE_CONSUL_PREFIX` to your desired prefix.
#### Consul ACL Token Permissions
If the Consul cluster being used is running ACLs, the following ACL policy will allow the required access:
```hcl
key "nomad-firehose" {
policy = "write"
}
session "" {
policy = "write"
}
```
If you've set a custom prefix, specify that in the `key` ACL entry instead.
### Kafka
To connect to Kafka with TLS, set the SINK_KAFKA_CA_CERT_PATH to the path to your CA cert file.
To use SASL/PLAIN authentication, set `$SINK_KAFKA_USER` and `$SINK_KAFKA_PASSWORD` environment variables.
## Usage
The `nomad-firehose` binary has several helper subcommands.
The sink type is configured using `$SINK_TYPE` environment variable. Valid values are:
- `amqp`
- `kinesis`
- `nsq`
- `redis`
- `kafka`
- `mongo`
- `sqs`
- `eventbridge`
- `stdout`
- `syslog`
The `amqp` and `rabbitmq` sinks are configured using `$SINK_AMQP_CONNECTION` (`amqp://guest:[email protected]:5672/`), `$SINK_AMQP_EXCHANGE`, `$SINK_AMQP_ROUTING_KEY`, and `$SINK_AMQP_WORKERS` (default: `1`) environment variables.
The `http` sink is configured using `$SINK_HTTP_ADDRESS` (`localhost:8080/allocations`)` environment variable.
The `kafka` sink is configured using `$SINK_KAFKA_BROKERS` (`kafka1:9092,kafka2:9092,kafka3:9092`), and `$SINK_KAFKA_TOPIC` environment variables.
The `kinesis` sink is configured using `$SINK_KINESIS_STREAM_NAME` and `$SINK_KINESIS_PARTITION_KEY` environment variables.
The `mongo` sink is configured using `$SINK_MONGODB_CONNECTION` (`mongodb://localhost:27017/`), `$SINK_MONGODB_DATABASE` and `$SINK_MONGODB_COLLECTION` environment variables.
The `nsq` sink is configured using `$SINK_NSQ_ADDR` and `$SINK_NSQ_TOPIC_NAME` environment variables.
The `redis` sink is configured using `$SINK_REDIS_URL` (`redis://[user]:[password]@127.0.0.1[:5672]/0`) and `$SINK_REDIS_KEY` environment variables.
The `stdout` sink does not have any configuration, it will simply output the JSON to stdout for debugging.
The `syslog` sink is configured using `$SINK_SYSLOG_PROTO` (e.g. `tcp`, `udp` - leave empty if logging to a local syslog socket), `$SINK_SYSLOG_ADDR` (e.g. `127.0.0.1:514` - leave empty if logging to a local syslog socket), and `$SINK_SYSLOG_TAG` (default: `nomad-firehose`).
The `sqs` sink is configured using `$SINK_SQS_QUEUE_NAME` which is the name of the queue in SQS. This queue is expected to be a FIFO queue.
The URL of the queue is inferred by the presence of the `AWS_REGION` and `AWS_ACCOUNT_ID` env variables.
The `eventbridge` sink is configured using `$SINK_EVENT_BUS_NAME` which is the name of the bus in Event Bridge. The environment variables `SINK_EVENT_BUS_DETAIL_TYPE` and `SINK_EVENT_BUS_SOURCE` are used to configure the schema when creating Event Bus rules.
### `allocations`
`nomad-firehose allocations` will monitor all allocation changes in the Nomad cluster and emit each task state as a new firehose event to the configured sink.
The allocation output is different from the [default API response](https://www.nomadproject.io/api/allocations.html), as the tool will emit an event per new [TaskStates](https://www.nomadproject.io/docs/http/allocs.html), rather than all the previous events.
```json
{
"Name": "job.task[0]",
"AllocationID": "1ef2eba2-00e4-3828-96d4-8e58b1447aaf",
"DesiredStatus": "run",
"DesiredDescription": "",
"ClientStatus": "running",
"ClientDescription": "",
"JobID": "logrotate",
"GroupName": "cron",
"TaskName": "logrotate",
"EvalID": "bf926150-ed30-6c13-c597-34d7a3165fdc",
"TaskState": "running",
"TaskFailed": false,
"TaskStartedAt": "2017-06-30T19:58:28.325895579Z",
"TaskFinishedAt": "0001-01-01T00:00:00Z",
"TaskEvent": {
"Type": "Task Setup",
"Time": 1498852707712617200,
"FailsTask": false,
"RestartReason": "",
"SetupError": "",
"DriverError": "",
"DriverMessage": "",
"ExitCode": 0,
"Signal": 0,
"Message": "Building Task Directory",
"KillReason": "",
"KillTimeout": 0,
"KillError": "",
"StartDelay": 0,
"DownloadError": "",
"ValidationError": "",
"DiskLimit": 0,
"DiskSize": 0,
"FailedSibling": "",
"VaultError": "",
"TaskSignalReason": "",
"TaskSignal": ""
}
}
```
### `nodes`
`nomad-firehose nodes` will monitor all node changes in the Nomad cluster and emit a firehose event per change to the configured sink.
The output will be equal to the [Nomad Node API structure](https://www.nomadproject.io/api/nodes.html)
### `evaluations`
`nomad-firehose evaluations` will monitor all evaluation changes in the Nomad cluster and emit a firehose event per change to the configured sink.
The output will be equal to the [Nomad Evaluation API structure](https://www.nomadproject.io/api/evaluations.html)
### `jobs`
`nomad-firehose jobs` will monitor all job changes in the Nomad cluster and emit a firehose event per change to the configured sink.
The output will be equal to the *full* [Nomad Job API structure](https://www.nomadproject.io/api/jobs.html#read-job)
### `jobliststubs`
`nomad-firehose jobliststubs` will monitor all job changes in the Nomad cluster and emit a firehose event per change to the configured sink.
The output will be equal to the job list [Nomad Job API structure](https://www.nomadproject.io/api/jobs.html#list-jobs)
### `deployments`
`nomad-firehose deployments` will monitor all deployment changes in the Nomad cluster and emit a firehose event per change to the configured sink.
The output will be equal to the *full* [Nomad Deployment API structure](https://www.nomadproject.io/api/deployments.html)