Run a Docker container
type: "io.kestra.plugin.docker.Run"Run the docker/whalesay container with the command 'cowsay hello'
id: docker_run
namespace: company.team
tasks:
- id: run
type: io.kestra.plugin.docker.Run
containerImage: docker/whalesay
commands:
- cowsay
- hello
Run the docker/whalesay container with no command
id: docker_run
namespace: company.team
tasks:
- id: run
type: io.kestra.plugin.docker.Run
containerImage: docker/whalesay
Run the docker/opentelemetry with commands and config file
id: docker_run
namespace: company.team
tasks:
- id: write
type: io.kestra.plugin.core.storage.Write
content: |
extensions:
health_check: {}
receivers:
otlp:
protocols:
grpc:
endpoint: 0.0.0.0:4317
http:
endpoint: 0.0.0.0:4318
exporters:
debug: {}
service:
pipelines:
logs:
receivers: [otlp]
exporters: [debug]
extension: .yaml
- id: run
type: io.kestra.plugin.docker.Run
containerImage: otel/opentelemetry-collector:latest
inputFiles:
otel.yaml: "{{ outputs.write.uri }}"
commands:
- --config
- otel.yaml
portBindings:
- "4318:4318"
wait: false
Run Docker with Ubuntu image, run shell commands to create a file, log the output in Kestra
id: docker_run_with_output_file
namespace: company.team
inputs:
- id: greetings
type: STRING
defaults: HELLO WORLD !!
tasks:
- id: docker_run_output_file
type: io.kestra.plugin.docker.Run
containerImage: ubuntu:22.04
commands:
- "/bin/sh"
- "-c"
- echo {{ inputs.greetings }} > file.txt
outputFiles:
- file.txt
- id: log
type: io.kestra.plugin.core.log.Log
message: "{{ read(outputs.docker_run_output_file.outputFiles['file.txt']) }}"
Docker image to use.
The commands to run
Docker configuration file.
Docker configuration file that can set access credentials to private container registries. Usually located in ~/.docker/config.json.
Limits the CPU usage to a given maximum threshold value.
By default, each container’s access to the host machine’s CPU cycles is unlimited. You can set various constraints to limit a given container’s access to the host machine’s CPU cycles.
Docker entrypoint to use.
Additional environment variables for the Docker container.
Extra hostname mappings to the container network interface configuration.
The URI of your Docker host e.g. localhost
The files to create on the local filesystem. It can be a map or a JSON object.
Limits memory usage to a given maximum threshold value.
Docker can enforce hard memory limits, which allow the container to use no more than a given amount of user or system memory, or soft limits, which allow the container to use as much memory as it needs unless certain conditions are met, such as when the kernel detects low memory or contention on the host machine. Some of these options have different effects when used alone or when more than one option is set.
Inject namespace files.
Inject namespace files to this task. When enabled, it will, by default, load all namespace files into the working directory. However, you can use the include or exclude properties to limit which namespace files will be injected.
Docker network mode to use e.g. host, none, etc.
The files from the local filesystem to send to Kestra's internal storage.
Must be a list of glob expressions relative to the current working directory, some examples: my-dir/**, my-dir/*/** or my-dir/my-file.txt.
List of port bindings.
Corresponds to the --publish (-p) option of the docker run CLI command using the format ip: dockerHostPort: containerPort/protocol. Possible example :
- 8080: 80/udp- 127.0.0.1: 8080: 80- 127.0.0.1: 8080: 80/udp
The pull policy for an image.
Pull policy can be used to prevent pulling of an already existing image IF_NOT_PRESENT, or can be set to ALWAYS to pull the latest version of the image even if an image with the same tag already exists.
Size of /dev/shm in bytes.
The size must be greater than 0. If omitted, the system uses 64MB.
User in the Docker container.
List of volumes to mount.
Must be a valid mount expression as string, example : /home/user:/app.
Volumes mount are disabled by default for security reasons; you must enable them on server configuration by setting kestra.tasks.scripts.docker.volume-enabled to true.
The exit code of the entire flow execution.
The output files' URIs in Kestra's internal storage.
The value extracted from the output of the executed commands.
A list of filters to exclude matching glob patterns. This allows you to exclude a subset of the Namespace Files from being downloaded at runtime. You can combine this property together with include to only inject a subset of files that you need into the task's working directory.
A list of filters to include only matching glob patterns. This allows you to only load a subset of the Namespace Files into the working directory.
The maximum amount of kernel memory the container can use.
The minimum allowed value is 4MB. Because kernel memory cannot be swapped out, a container which is starved of kernel memory may block host machine resources, which can have side effects on the host machine and on other containers. See the kernel-memory docs for more details.
The maximum amount of memory resources the container can use.
Make sure to use the format number + unit (regardless of the case) without any spaces.
The unit can be KB (kilobytes), MB (megabytes), GB (gigabytes), etc.
Given that it's case-insensitive, the following values are equivalent:
"512MB""512Mb""512mb""512000KB""0.5GB"
It is recommended that you allocate at least 6MB.
Allows you to specify a soft limit smaller than memory which is activated when Docker detects contention or low memory on the host machine.
If you use memoryReservation, it must be set lower than memory for it to take precedence. Because it is a soft limit, it does not guarantee that the container doesn’t exceed the limit.
The total amount of memory and swap that can be used by a container.
If memory and memorySwap are set to the same value, this prevents containers from using any swap. This is because memorySwap includes both the physical memory and swap space, while memory is only the amount of physical memory that can be used.
A setting which controls the likelihood of the kernel to swap memory pages.
By default, the host kernel can swap out a percentage of anonymous pages used by a container. You can set memorySwappiness to a value between 0 and 100 to tune this percentage.
The registry authentication.
The auth field is a base64-encoded authentication string of username: password or a token.
The identity token.
The registry password.
The registry URL.
If not defined, the registry will be extracted from the image name.
The registry token.
The registry username.
A list of capabilities; an OR list of AND lists of capabilities.
Driver-specific options, specified as key/value pairs.
These options are passed directly to the driver.