amazon-ecs-agent

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Version: v1.0.0 Latest Latest
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Published: Apr 3, 2015 License: Apache-2.0, BSD-2-Clause, BSD-3-Clause, MIT

README

Amazon ECS Container Agent

Build Status

The Amazon ECS Container Agent is software developed for the Amazon EC2 Container Service.

It runs on Container Instances and starts containers on behalf of Amazon ECS.

Basic Usage

Docker Image

The Amazon ECS Container Agent should be run in a docker container and may be downloaded from our Docker Hub Repository. Documentation on running it properly may be found on the Repository page.

tl;dr: On an Amazon ECS Container Instance

  1. touch /etc/ecs/ecs.config
  2. mkdir -p /var/log/ecs
  3. docker run --name ecs-agent -d -v /var/run/docker.sock:/var/run/docker.sock -v /var/log/ecs:/log -p 127.0.0.1:51678:51678 --env-file /etc/ecs/ecs.config -e ECS_LOGFILE=/log/ecs-agent.log amazon/amazon-ecs-agent

See also the Advanced Usage section below.

Building and Running from source

Please note, running the Amazon ECS Container Agent outside of Amazon EC2 is not supported

Docker Image

The Amazon ECS Container Agent may be built by simply typing make with the Docker daemon (v1.5.0) running.

This will produce an image tagged amazon/ecs-container-agent:make which you may run as described above.

Standalone

The Amazon ECS Container Agent may also be run outside of a docker container as a go binary. This is not recommended for production, but it can be useful for development or easier integration with your local Go tools.

The following commands will run it outside of Docker:

make gobuild
./out/amazon-ecs-agent
Make Targets

The following targets are available. Each may be run with make <target>.

Make Target Description
release (Default) release builds the agent within a docker container and and packages it into a scratch-based image
gobuild gobuild runs a normal go build of the agent and stores the binary in ./out/amazon-ecs-agent
static static runs go build to produce a static binary in ./out/amazon-ecs-agent
test test runs all tests using go test
test-in-docker test-in-docker runs all tests inside a docker container
clean clean removes build artifacts. Note: this does not remove docker images

Advanced Usage

The Amazon ECS Container Agent supports a number of configuration options, most of which should be set through environment variables.

Environment Variables

The following environment variables are available. All of them are optional. They are listed in a general order of likelihood that a user may want to configure them as something other than the defaults.

Environment Key Example Value(s) Description Default Value
ECS_CLUSTER clusterName The cluster this agent should check into. default
ECS_RESERVED_PORTS [22, 80, 5000, 8080] An array of ports that should be marked as unavailable for scheduling on this Container Instance. [22, 2375, 2376, 51678]
ECS_ENGINE_AUTH_TYPE "docker" | "dockercfg" What type of auth data is stored in the ECS_ENGINE_AUTH_DATA key
ECS_ENGINE_AUTH_DATA See documentation Docker auth data formatted as defined by ECS_ENGINE_AUTH_TYPE.
AWS_DEFAULT_REGION <us-west-2>|<us-east-1>|… The region to be used in API requests as well as to infer the correct backend host. Taken from EC2 Instance Metadata
AWS_ACCESS_KEY_ID AKIDEXAMPLE The Access Key used by the agent for all calls. Taken from EC2 Instance Metadata
AWS_SECRET_ACCESS_KEY EXAMPLEKEY The Secret Key used by the agent for all calls. Taken from EC2 Instance Metadata
DOCKER_HOST unix:///var/run/docker.sock Used to create a connection to the Docker daemon; behaves similarly to this environment variable as used by the Docker client. unix:///var/run/docker.sock
ECS_LOGLEVEL <crit> | <error> | <warn> | <info> | <debug> What level to log at on stdout. warn
ECS_LOGFILE /ecs-agent.log The path to output full debugging info to. If blank, no logs will be written to file. If set, logs at debug level (regardless of ECS_LOGLEVEL) will be written to that file. blank
ECS_CHECKPOINT <true | false> Whether to checkpoint state to the DATADIR specified below true if ECS_DATADIR is non-empty; false otherwise
ECS_DATADIR /data/ The container path where state is checkpointed for use across agent restarts. /data/
ECS_UPDATES_ENABLED <true | false> Whether to exit for an updater to apply updates when requested false
ECS_UPDATE_DOWNLOAD_DIR /cache Where to place update tarballs within the container
AWS_SESSION_TOKEN The Session Token used for temporary credentials. Taken from EC2 Instance Metadata
Flags

The agent also supports the following flags:

  • -k — The agent will not requre valid SSL certificates for the services it communicates with.
  • -loglevel — Options: [<crit>|<error>|<warn>|<info>|<debug>]. The agent will output on stdout at the given level. This is overridden by the ECS_LOGLEVEL environment variable, if present.

Contributing

Contributions and feedback are welcome! Proposals and Pull Requests will be considered and responded to. Please see the CONTRIBUTING.md file for more information.

Amazon Web Services does not currently provide support for modified copies of this software.

License

The Amazon ECS Container Agent is licensed under the Apache 2.0 License.

Directories

Path Synopsis
Godeps/_workspace/src/github.com/docker/docker/pkg/pools
Package pools provides a collection of pools which provide various data types with buffers.
Package pools provides a collection of pools which provide various data types with buffers.
Godeps/_workspace/src/github.com/fsouza/go-dockerclient
Package docker provides a client for the Docker remote API.
Package docker provides a client for the Docker remote API.
Godeps/_workspace/src/github.com/fsouza/go-dockerclient/testing
Package testing provides a fake implementation of the Docker API, useful for testing purpose.
Package testing provides a fake implementation of the Docker API, useful for testing purpose.
Godeps/_workspace/src/github.com/gorilla/context
Package context stores values shared during a request lifetime.
Package context stores values shared during a request lifetime.
Godeps/_workspace/src/github.com/gorilla/mux
Package gorilla/mux implements a request router and dispatcher.
Package gorilla/mux implements a request router and dispatcher.
Godeps/_workspace/src/github.com/gorilla/websocket
Package websocket implements the WebSocket protocol defined in RFC 6455.
Package websocket implements the WebSocket protocol defined in RFC 6455.
Godeps/_workspace/src/github.com/gorilla/websocket/examples/autobahn
Command server is a test server for the Autobahn WebSockets Test Suite.
Command server is a test server for the Autobahn WebSockets Test Suite.
Godeps/_workspace/src/gopkg.in/inconshreveable/log15.v2
Package log15 provides an opinionated, simple toolkit for best-practice logging that is both human and machine readable.
Package log15 provides an opinionated, simple toolkit for best-practice logging that is both human and machine readable.
Godeps/_workspace/src/gopkg.in/inconshreveable/log15.v2/stack
Package stack implements utilities to capture, manipulate, and format call stacks.
Package stack implements utilities to capture, manipulate, and format call stacks.
acs/client
Package acsclient wraps the generated aws-sdk-go client to provide marshalling and unmarshalling of data over a websocket connection in the format expected by ACS.
Package acsclient wraps the generated aws-sdk-go client to provide marshalling and unmarshalling of data over a websocket connection in the format expected by ACS.
acs/handler
Package handler deals with appropriately reacting to all ACS messages as well as maintaining the connection to ACS.
Package handler deals with appropriately reacting to all ACS messages as well as maintaining the connection to ACS.
acs/update_handler
Package updater handles requests to update the agent.
Package updater handles requests to update the agent.
acs/update_handler/os
Package os provides interfaces around the 'os', 'io', and 'ioutil' functions so that may be mocked out appropriately
Package os provides interfaces around the 'os', 'io', and 'ioutil' functions so that may be mocked out appropriately
api
api/testutils
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
config
Package config handles loading configuration data, warning on missing data, and setting sane defaults.
Package config handles loading configuration data, warning on missing data, and setting sane defaults.
ec2
ecs_client/codec/codec
The codec package defines how to read and write data from the wire
The codec package defines how to read and write data from the wire
engine
The 'engine' package contains code for interacting with container-running backends and handling events from them.
The 'engine' package contains code for interacting with container-running backends and handling events from them.
engine/dockerauth
Package dockerauth handles storing auth configuration information for Docker registries.
Package dockerauth handles storing auth configuration information for Docker registries.
engine/dockerstate/testutils
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
engine/emptyvolume
Package emptyvolume contains some information related to the 'emptyvolumes'
Package emptyvolume contains some information related to the 'emptyvolumes'
engine/testutils
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
Package testutils contains files that are used in tests but not elsewhere and thus can be excluded from the final executable.
handlers
Package handlers deals with the agent introspection api.
Package handlers deals with the agent introspection api.
httpclient
Package httpclient provides a thin, but testable, wrapper around http.Client.
Package httpclient provides a thin, but testable, wrapper around http.Client.
sighandlers
sighandlers handle signals and behave appropriately.
sighandlers handle signals and behave appropriately.
sighandlers/exitcodes
Package exitcodes defines agent exit codes
Package exitcodes defines agent exit codes
statemanager
Package statemanager implements simple constructs for saving and restoring state from disk.
Package statemanager implements simple constructs for saving and restoring state from disk.
utils/ttime
Package ttime implements a testable alternative to the Go "time" package.
Package ttime implements a testable alternative to the Go "time" package.
version
Package version contains constants to indicate the current version of the agent.
Package version contains constants to indicate the current version of the agent.
misc
netkitten
Netkitten is a slimmed down netcat intended to make our integ tests able to run containers lighter than busybox+netcat, but still be able to do suitably complex network testing.
Netkitten is a slimmed down netcat intended to make our integ tests able to run containers lighter than busybox+netcat, but still be able to do suitably complex network testing.

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