**ClearML Agent - ML-Ops made easy
ML-Ops scheduler & orchestration solution supporting Linux, macOS and Windows**
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### Simple, Flexible Experiment Orchestration
**The ClearML Agent was built to address the DL/ML R&D DevOps needs:**
* Easily add & remove machines from the cluster
* Reuse machines without the need for any dedicated containers or images
* **Combine GPU resources across any cloud and on-prem**
* **No need for yaml / json / template configuration of any kind**
* **User friendly UI**
* Manageable resource allocation that can be used by researchers and engineers
* Flexible and controllable scheduler with priority support
* Automatic instance spinning in the cloud
**Using the ClearML Agent, you can now set up a dynamic cluster with \*epsilon DevOps**
*epsilon - Because we are :triangular_ruler: and nothing is really zero work
### Kubernetes Integration (Optional)
We think Kubernetes is awesome, but it should be a choice. We designed `clearml-agent` so you can run bare-metal or
inside a pod with any mix that fits your environment.
Find Dockerfiles in the [docker](./docker) dir and a helm Chart in https://github.com/allegroai/clearml-helm-charts
#### Benefits of integrating existing K8s with ClearML-Agent
- ClearML-Agent adds the missing scheduling capabilities to K8s
- Allowing for more flexible automation from code
- A programmatic interface for easier learning curve (and debugging)
- Seamless integration with ML/DL experiment manager
- Web UI for customization, scheduling & prioritization of jobs
**Two K8s integration flavours**
- Spin ClearML-Agent as a long-lasting service pod
- use [clearml-agent](https://hub.docker.com/r/allegroai/clearml-agent) docker image
- map docker socket into the pod (soon replaced by [podman](https://github.com/containers/podman))
- allow the clearml-agent to manage sibling dockers
- benefits: full use of the ClearML scheduling, no need to worry about wrong container images / lost pods etc.
- downside: Sibling containers
- Kubernetes Glue, map ClearML jobs directly to K8s jobs
- Run the [clearml-k8s glue](https://github.com/allegroai/clearml-agent/blob/master/examples/k8s_glue_example.py) on
a K8s cpu node
- The clearml-k8s glue pulls jobs from the ClearML job execution queue and prepares a K8s job (based on provided
yaml template)
- Inside the pod itself the clearml-agent will install the job (experiment) environment and spin and monitor the
experiment's process
- benefits: Kubernetes full view of all running jobs in the system
- downside: No real scheduling (k8s scheduler), no docker image verification (post-mortem only)
### Using the ClearML Agent
**Full scale HPC with a click of a button**
The ClearML Agent is a job scheduler that listens on job queue(s), pulls jobs, sets the job environments, executes the
job and monitors its progress.
Any 'Draft' experiment can be scheduled for execution by a ClearML agent.
A previously run experiment can be put into 'Draft' state by either of two methods:
* Using the **'Reset'** action from the experiment right-click context menu in the ClearML UI - This will clear any
results and artifacts the previous run had created.
* Using the **'Clone'** action from the experiment right-click context menu in the ClearML UI - This will create a new '
Draft' experiment with the same configuration as the original experiment.
An experiment is scheduled for execution using the **'Enqueue'** action from the experiment right-click context menu in
the ClearML UI and selecting the execution queue.
See [creating an experiment and enqueuing it for execution](#from-scratch).
Once an experiment is enqueued, it will be picked up and executed by a ClearML agent monitoring this queue.
The ClearML UI Workers & Queues page provides ongoing execution information:
- Workers Tab: Monitor you cluster
- Review available resources
- Monitor machines statistics (CPU / GPU / Disk / Network)
- Queues Tab:
- Control the scheduling order of jobs
- Cancel or abort job execution
- Move jobs between execution queues
#### What The ClearML Agent Actually Does
The ClearML Agent executes experiments using the following process:
- Create a new virtual environment (or launch the selected docker image)
- Clone the code into the virtual-environment (or inside the docker)
- Install python packages based on the package requirements listed for the experiment
- Special note for PyTorch: The ClearML Agent will automatically select the torch packages based on the CUDA_VERSION
environment variable of the machine
- Execute the code, while monitoring the process
- Log all stdout/stderr in the ClearML UI, including the cloning and installation process, for easy debugging
- Monitor the execution and allow you to manually abort the job using the ClearML UI (or, in the unfortunate case of a
code crash, catch the error and signal the experiment has failed)
#### System Design & Flow
#### Installing the ClearML Agent
```bash
pip install clearml-agent
```
#### ClearML Agent Usage Examples
Full Interface and capabilities are available with
```bash
clearml-agent --help
clearml-agent daemon --help
```
#### Configuring the ClearML Agent
```bash
clearml-agent init
```
Note: The ClearML Agent uses a cache folder to cache pip packages, apt packages and cloned repositories. The default
ClearML Agent cache folder is `~/.clearml`
See full details in your configuration file at `~/clearml.conf`
Note: The **ClearML agent** extends the **ClearML** configuration file `~/clearml.conf`
They are designed to share the same configuration file, see example [here](docs/clearml.conf)
#### Running the ClearML Agent
For debug and experimentation, start the ClearML agent in `foreground` mode, where all the output is printed to screen
```bash
clearml-agent daemon --queue default --foreground
```
For actual service mode, all the stdout will be stored automatically into a temporary file (no need to pipe)
Notice: with `--detached` flag, the *clearml-agent* will be running in the background
```bash
clearml-agent daemon --detached --queue default
```
GPU allocation is controlled via the standard OS environment `NVIDIA_VISIBLE_DEVICES` or `--gpus` flag (or disabled
with `--cpu-only`).
If no flag is set, and `NVIDIA_VISIBLE_DEVICES` variable doesn't exist, all GPU's will be allocated for
the `clearml-agent`