woodpecker/docs/versioned_docs/version-2.6/10-intro.md

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# Welcome to Woodpecker
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Woodpecker is a simple, yet powerful CI/CD engine with great extensibility. It focuses on executing pipelines inside [containers](https://opencontainers.org/).
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If you are already using containers in your daily workflow, you'll for sure love Woodpecker.
![woodpecker](woodpecker.png)
## `.woodpecker.yaml`
- Place your pipeline in a file named `.woodpecker.yaml` in your repository
- Pipeline steps can be named as you like
- Run any command in the commands section
```yaml title=".woodpecker.yaml"
steps:
- name: build
image: debian
commands:
- echo "This is the build step"
- name: a-test-step
image: debian
commands:
- echo "Testing.."
```
### Steps are containers
- Define any container image as context
- either use your own and install the needed tools in a custom image
- or search for available images that are already tailored for your needs in image registries like [Docker Hub](https://hub.docker.com/search?type=image)
- List the commands that should be executed in the container
```diff
steps:
- name: build
- image: debian
+ image: mycompany/image-with-awscli
commands:
- aws help
```
### File changes are incremental
- Woodpecker clones the source code in the beginning
- File changes are persisted throughout individual steps as the same volume is being mounted in all steps
```yaml title=".woodpecker.yaml"
steps:
- name: build
image: debian
commands:
- touch myfile
- name: a-test-step
image: debian
commands:
- cat myfile
```
## Plugins are straightforward
- If you copy the same shell script from project to project
- Pack it into a plugin instead
- And make the yaml declarative
- Plugins are Docker images with your script as an entrypoint
```dockerfile title="Dockerfile"
FROM laszlocloud/kubectl
COPY deploy /usr/local/deploy
ENTRYPOINT ["/usr/local/deploy"]
```
```bash title="deploy"
kubectl apply -f $PLUGIN_TEMPLATE
```
```yaml title=".woodpecker.yaml"
steps:
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- name: deploy-to-k8s
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image: laszlocloud/my-k8s-plugin
settings:
template: config/k8s/service.yaml
```
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See [plugin docs](./20-usage/51-plugins/51-overview.md).
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## Continue reading
- [Create a Woodpecker pipeline for your repository](./20-usage/10-intro.md)
- [Setup your own Woodpecker instance](./30-administration/00-deployment/00-overview.md)