20 KiB
fleetctl CLI
- Introduction
- Using fleetctl
- Setting Up Fleet
- Logging in to an existing Fleet instance
- Using fleetctl to configure Fleet
- Using fleetctl with an API-only user
- File carving
Introduction
Fleetctl (pronounced "Fleet control") is a CLI tool for managing Fleet from the command line. Fleetctl enables a GitOps workflow with Fleet and osquery. With fleetctl, you can manage configurations, queries, packs, generate osquery installers, etc.
Fleetctl also provides a quick way to work with all the data exposed by Fleet without having to use the Fleet UI or work directly with the Fleet API.
Using fleetctl
You can use fleetctl to accomplish many tasks you would typically need to do through the Fleet UI. You can even set up or apply configuration files to the Fleet server.
Available commands
Much of the functionality available in the Fleet UI is also available in fleetctl. You can run queries, add and remove users, generate osquery installers to add new hosts, get information about existing hosts, and more! The following commands are available for use with fleetctl:
| Command | Description |
|---|---|
| apply | Apply files to declaratively manage osquery configurations |
| delete | Specify files to declaratively batch delete osquery configurations |
| setup | Set up a Fleet instance |
| login | Login to Fleet |
| logout | Log out of Fleet |
| query | Run a live query |
| get | Get/list resources |
| config | Modify Fleet server connection settings |
| convert | Convert osquery packs into decomposed Fleet configs |
| goquery | Start the goquery interface |
| user | Manage Fleet users |
| debug | Tools for debugging Fleet |
| preview | Start a preview deployment of the Fleet server |
| updates | Manage client updates |
| hosts | Manage Fleet hosts |
| vulnerability-data-stream | Download the vulnerability data stream |
| package | Create an Orbit installer package |
| help, h | Shows a list of commands or help for one command |
Get more info about a command
Each command available to fleetctl has a help menu with additional information. To pull up the help menu, run fleetctl <command> --help, replacing <command> with the command you're looking up:
> fleetctl setup --help
You will see more info about the command, including the usage and information about any additional commands and options (or 'flags') that can be passed with it:
NAME:
fleetctl setup - Set up a Fleet instance
USAGE:
fleetctl setup [options]
OPTIONS:
--email value Email of the admin user to create (required) [$EMAIL]
--name value Name or nickname of the admin user to create (required) [$NAME]
--password value Password for the admin user (recommended to use interactive entry) [$PASSWORD]
--org-name value Name of the organization (required) [$ORG_NAME]
--config value Path to the fleetctl config file (default: "/Users/ksatter/.fleet/config") [$CONFIG]
--context value Name of fleetctl config context to use (default: "default") [$CONTEXT]
--debug Enable debug http request logging (default: false) [$DEBUG]
--help, -h show help (default: false)
Setting up Fleet
This section walks through setting up and configuring Fleet via the CLI. If you already have a running Fleet instance, skip ahead to Logging in to an existing Fleet instance to configure the fleetctl CLI.
This guide illustrates:
- A minimal CLI workflow for managing an osquery fleet
- The set of API interactions that are required if you want to perform remote, automated management of a Fleet instance
Running Fleet
For the sake of this tutorial, we will be using the local development Docker Compose infrastructure to run Fleet locally. This is documented in some detail in the developer documentation, but the following are the minimal set of commands that you can run from the root of the repository (assuming that you have a working Go/JavaScript toolchain installed along with Docker Compose):
docker-compose up -d
make deps
make generate
make
./build/fleet prepare db
./build/fleet serve
The fleet serve command will be the long running command that runs the Fleet server.
Fleetctl config
At this point, the MySQL database doesn't have any users in it. Because of this, Fleet is exposing a one-time setup endpoint. Before we can hit that endpoint (by running fleetctl setup), we have to first configure the local fleetctl context.
Now, since our Fleet instance is local in this tutorial, we didn't get a valid TLS certificate, so we need to run the following to configure our Fleet context:
fleetctl config set --address https://localhost:8080 --tls-skip-verify
[+] Set the address config key to "https://localhost:8080" in the "default" context
[+] Set the tls-skip-verify config key to "true" in the "default" context
Now, if you were connecting to a Fleet instance for real, you wouldn't want to skip TLS certificate verification, so you might run something like:
fleetctl config set --address https://fleet.corp.example.com
[+] Set the address config key to "https://fleet.corp.example.com" in the "default" context
Fleetctl setup
Now that we've configured our local CLI context, lets go ahead and create our admin account:
fleetctl setup --email zwass@example.com --name 'Zach' --org-name 'Fleet Test'
Password:
[+] Fleet setup successful and context configured!
It's possible to specify the password via the --password flag or the $PASSWORD environment variable, but be cautious of the security implications of such an action. For local use, the interactive mode above is the most secure.
Query hosts
To run a simple query against all hosts, you might run something like the following:
fleetctl query --query 'SELECT * FROM osquery_info;' --labels='All Hosts' > results.json
⠂ 100% responded (100% online) | 1/1 targeted hosts (1/1 online)
^C
When the query is done (or you have enough results), CTRL-C and look at the results.json file:
{
"host": "marpaia",
"rows": [
{
"build_distro": "10.13",
"build_platform": "darwin",
"config_hash": "d7cafcd183cc50c686b4c128263bd4eace5d89e1",
"config_valid": "1",
"extensions": "active",
"host_hostname": "marpaia",
"instance_id": "37840766-7182-4a68-a204-c7f577bd71e1",
"pid": "22984",
"start_time": "1527031727",
"uuid": "B312055D-9209-5C89-9DDB-987299518FF7",
"version": "3.2.3",
"watcher": "-1"
}
]
}
Logging in to an existing Fleet instance
If you have an existing Fleet instance, run fleetctl login (after configuring your local CLI context):
fleetctl config set --address https://fleet.corp.example.com
[+] Set the address config key to "https://fleet.corp.example.com" in the "default" context
fleetctl login
Log in using the standard Fleet credentials.
Email: mike@arpaia.co
Password:
[+] Fleet login successful and context configured!
Once your local context is configured, you can use the above fleetctl normally. See fleetctl --help for more information.
Logging in with SAML (SSO) authentication
Users that authenticate to Fleet via SSO should retrieve their API token from the UI and set it manually in their fleetctl configuration (instead of logging in via fleetctl login).
-
Go to the "My account" page in Fleet (https://fleet.corp.example.com/profile). Click the "Get API token" button to bring up a modal with the API token.
-
Set the API token in the
~/.fleet/configfile. The file should look like the following:
contexts:
default:
address: https://fleet.corp.example.com
email: example@example.com
token: your_token_here
Note the token can also be set with fleetctl config set --token, but this may leak the token into a user's shell history.
Using fleetctl to configure Fleet
A Fleet configuration is defined using one or more declarative "messages" in yaml syntax.
Fleet configuration can be retrieved and applied using the fleetctl tool.
Fleetctl get
The fleetctl get <fleet-entity-here> > <configuration-file-name-here>.yml command allows you retrieve the current configuration and create a new file for specified Fleet entity (queries, packs, etc.)
Fleetctl apply
The fleetctl apply -f <configuration-file-name-here>.yml allows you to apply the current configuration in the specified file.
Check out the configuration files section of the documentation for example yaml files.
Fleetctl convert
fleetctl includes easy tooling to convert osquery pack JSON into the
fleetctl format. Use fleetctl convert with a path to the pack file:
You can optionally supply -o file_name to output to a file destination.
fleetctl convert -f test.json
---
apiVersion: v1
kind: pack
spec:
name: test
queries:
- description: "this is a test query"
interval: 10
name: processes
query: processes
removed: false
targets:
labels: null
---
apiVersion: v1
kind: query
spec:
name: processes
query: SELECT * FROM processes
Using fleetctl with an API-only user
When running automated workflows using the Fleet API, we recommend an API-only user's API key rather than the API key of a regular user. A regular user's API key expires frequently for security purposes, requiring routine updates. Meanwhile, an API-only user's key does not expire. An API-only user does not have access to the Fleet UI. Instead, it's only purpose is to interact with the API programmatically or from fleetctl.
Create an API-only user
To create your new API-only user, run fleetctl user create and pass values for --name, --email, and --password, and include the --api-only flag:
fleetctl user create --name "API User" --email api@example.com --password temp!pass --api-only
Permissions for an API-only user
An API-only user can be given the same permissions as a regular user. The default access level is Observer. For more information on permissions, see the user permissions documentation.
If you'd like your API-only user to have a different access level than the default Observer role, you can specify what level of access the new user should have using the --global-role flag:
fleetctl user create --name "API User" --email api@example.com --password temp!pass --api-only --global-role admin
Use fleetctl as an API-only user
To use fleetctl with an API-only user, you will need to log in with fleetctl login. Once done, you'll be able to perform tasks using fleetctl as your new API-only user.
If you are using a version of Fleet older than
4.13.0, you will need to reset the API-only user's password before running queries.
Get the API token of an API-only user
To get the API key of an API-only user, you need to call the Login API with the credentials supplied during user creation.
For example, say the credentials provided were api@fleetdm.com for the email and foobar12345 for the password. You may call the Log in API like so:
curl --location --request POST 'https://myfleetdomain.com/api/v1/fleet/login' \
--header 'Content-Type: application/json' \
--data-raw '{
"email": "api@fleetdm.com",
"password": "foobar12345"
}'
The Log in API will return a response similar to the one below with the API token included that will not expire.
{
"user": {
"id": 82,
"name": "API User",
"email": "api@fleetdm.com",
"global_role": "observer",
"api_only": true
},
"available_teams": [],
"token": "foo_token"
}
Switching users
To use fleetctl with your regular user account but occasionally use your API-only user for specific cases, you can set up your fleetctl config with a new context to hold the credentials of your API-only user:
fleetctl config set --address https://dogfood.fleetdm.com --context api
[+] Context "api" not found, creating it with default values
[+] Set the address config key to "https://dogfood.fleetdm.com" in the "api" context
From there on, you can use the --context api flag whenever you need to use the API-only user's identity, rather than logging in and out to switch accounts:
fleetctl login --context admin
Log in using the admin Fleet credentials.
Email: admin@example.com
Password:
[+] Fleet login successful and context configured!
Running a command with no context will use the default profile.
File carving
Fleet supports osquery's file carving functionality as of Fleet 3.3.0. This allows the Fleet server to request files (and sets of files) from osquery agents, returning the full contents to Fleet.
File carving data can be either stored in Fleet's database or to an external S3 bucket. For information on how to configure the latter, consult the configuration docs.
Configuration
Given a working flagfile for connecting osquery agents to Fleet, add the following flags to enable carving:
--disable_carver=false
--carver_disable_function=false
--carver_start_endpoint=/api/v1/osquery/carve/begin
--carver_continue_endpoint=/api/v1/osquery/carve/block
--carver_block_size=2097152
The default flagfile provided in the "Add New Host" dialog also includes this configuration.
Carver block size
The carver_block_size flag should be configured in osquery.
For the (default) MySQL Backend, the configured value must be less than the value of
max_allowed_packet in the MySQL connection, allowing for some overhead. The default for MySQL 5.7
is 4MB and for MySQL 8 it is 64MB. 2MiB (2097152) is a good starting value.
For the S3/Minio backend, this value must be set to at least 5MiB (5242880) due to the
constraints of S3's multipart
uploads.
Using a smaller value for carver_block_size will lead to more HTTP requests during the carving
process, resulting in longer carve times and higher load on the Fleet server. If the value is too
high, HTTP requests may run long enough to cause server timeouts.
Compression
Compression of the carve contents can be enabled with the carver_compression flag in osquery. When used, the carve results will be compressed with Zstandard compression.
Usage
File carves are initiated with osquery queries. Issue a query to the carves table, providing carve = 1 along with the desired path(s) as constraints.
For example, to extract the /etc/hosts file on a host with hostname mac-workstation:
fleetctl query --hosts mac-workstation --query 'SELECT * FROM carves WHERE carve = 1 AND path = "/etc/hosts"'
The standard osquery file globbing syntax is also supported to carve entire directories or more:
fleetctl query --hosts mac-workstation --query 'SELECT * FROM carves WHERE carve = 1 AND path LIKE "/etc/%%"'
Retrieving carves
List the non-expired (see below) carves with fleetctl get carves. Note that carves will not be available through this command until osquery checks in to the Fleet server with the first of the carve contents. This can take some time from initiation of the carve.
To also retrieve expired carves, use fleetctl get carves --expired.
Contents of carves are returned as .tar archives, and compressed if that option is configured.
To download the contents of a carve with ID 3, use
fleetctl get carve --outfile carve.tar 3
It can also be useful to pipe the results directly into the tar command for unarchiving:
fleetctl get carve --stdout 3 | tar -x
Expiration
Carve contents remain available for 24 hours after the first data is provided from the osquery client. After this time, the carve contents are cleaned from the database and the carve is marked as "expired".
The same is not true if S3 is used as the storage backend. In that scenario, it is suggested to setup a bucket lifecycle configuration to avoid retaining data in excess. Fleet, in an "eventual consistent" manner (i.e. by periodically performing comparisons), will keep the metadata relative to the files carves in sync with what it is actually available in the bucket.
Alternative carving backends
Minio
Configure the following:
FLEET_S3_ENDPOINT_URL=minio_host:portFLEET_S3_BUCKET=minio_bucket_nameFLEET_S3_SECRET_ACCESS_KEY=your_secret_access_keyFLEET_S3_ACCESS_KEY_ID=acces_key_idFLEET_S3_FORCE_S3_PATH_STYLE=trueFLEET_S3_REGION=minioor any non-empty string otherwise Fleet will attempt to derive the region.
Troubleshooting
Check carve status in osquery
Osquery can report on the status of carves through queries to the carves table.
The details provided by
fleetctl query --labels 'All Hosts' --query 'SELECT * FROM carves'
can be helpful to debug carving problems.
Ensure carver_block_size is set appropriately
carver_block_size is an osquery flag that sets the size of each part of a file carve that osquery
sends to the Fleet server.
When using the MySQL backend (default), this value must be less than the max_allowed_packet
setting in MySQL. If it is too large, MySQL will reject the writes.
When using S3, the value must be at least 5MiB (5242880 bytes), as smaller multipart upload sizes are rejected. Additionally S3 limits the maximum number of parts to 10,000.
The value must be small enough that HTTP requests do not time out.
Start with a default of 2MiB for MySQL (2097152 bytes), and 5MiB for S3/Minio (5242880 bytes).
Debugging Fleet
fleetctl provides debugging capabilities about the running Fleet server via the debug command. To see a complete list of all the options run:
fleetctl debug --help
To generate a full debugging archive, run:
fleetctl debug archive
This will generate a tar.gz file with:
profarchives that can be inspected viago tools pprof <archive_name_here>.- A file containing a set of all the errors that happened in the server during the interval of time defined by the logging_error_retention_period configuration.
- Files containing database-specific information.