README
¶
Amazon ECS Container Agent
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
touch /etc/ecs/ecs.configmkdir -p /var/log/ecsdocker run --name ecs-agent -d -v /var/run/docker.sock:/var/run/docker.sock -v /var/log/ecs:/log -v /var/lib/ecs/data:/data -p 127.0.0.1:51678:51678 --env-file /etc/ecs/ecs.config -e ECS_LOGFILE=/log/ecs-agent.log -e ECS_DATADIR=/data/ 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_RESERVED_PORTS_UDP |
[53, 123] |
An array of UDP ports that should be marked as unavailable for scheduling on this Container Instance. | [] |
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. | info |
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 explicitly set to a non-empty value; 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 | |
ECS_DISABLE_METRICS |
<true | false> | Whether to disable metrics gathering for tasks. | false |
ECS_DOCKER_GRAPHPATH |
/var/lib/docker | Used to create the path to the state file of contaienrs launched. The state file is used to read utilization metrics of containers. | /var/lib/docker |
AWS_SESSION_TOKEN |
The Session Token used for temporary credentials. | Taken from EC2 Instance Metadata | |
ECS_RESERVED_MEMORY |
32 | Memory, in MB, to reserve for use by things other than containers managed by ECS. | 0 |
Persistence
When running the Amazon ECS Container Agent in production, its datadir should be persisted
between runs of the Docker container. If this data is not persisted, the Amazon ECS Agent will register
a new Container Instance ARN on each launch and will not be able to update the state of tasks it previously ran.
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 theECS_LOGLEVELenvironment 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/GoogleCloudPlatform/kubernetes/pkg/credentialprovider
Package credentialprovider supplies interfaces and implementations for docker registry providers to expose their authentication scheme.
|
Package credentialprovider supplies interfaces and implementations for docker registry providers to expose their authentication scheme. |
|
Godeps/_workspace/src/github.com/GoogleCloudPlatform/kubernetes/pkg/credentialprovider/gcp
Package gcp_credentials contains implementations of DockerConfigProvider for Google Cloud Platform.
|
Package gcp_credentials contains implementations of DockerConfigProvider for Google Cloud Platform. |
|
Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws
Package aws provides core functionality for making requests to AWS services.
|
Package aws provides core functionality for making requests to AWS services. |
|
Godeps/_workspace/src/github.com/cihub/seelog
Package seelog implements logging functionality with flexible dispatching, filtering, and formatting.
|
Package seelog implements logging functionality with flexible dispatching, filtering, and formatting. |
|
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/docker/libcontainer
Temporary API endpoint for libcontainer while the full API is finalized (api.go).
|
Temporary API endpoint for libcontainer while the full API is finalized (api.go). |
|
Godeps/_workspace/src/github.com/docker/libcontainer/integration
integration is used for integration testing of libcontainer
|
integration is used for integration testing of libcontainer |
|
Godeps/_workspace/src/github.com/docker/libcontainer/netlink
Packet netlink provide access to low level Netlink sockets and messages.
|
Packet netlink provide access to low level Netlink sockets and messages. |
|
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/golang/glog
Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
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Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup. |
|
Godeps/_workspace/src/github.com/golang/mock/gomock
GoMock - a mock framework for Go.
|
GoMock - a mock framework for Go. |
|
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/github.com/vaughan0/go-ini
Package ini provides functions for parsing INI configuration files.
|
Package ini provides functions for parsing INI configuration files. |
|
Godeps/_workspace/src/golang.org/x/net/context
Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes.
|
Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes. |
|
Godeps/_workspace/src/golang.org/x/tools/go/ast/astutil
Package astutil contains common utilities for working with the Go AST.
|
Package astutil contains common utilities for working with the Go AST. |
|
Godeps/_workspace/src/golang.org/x/tools/imports
Package imports implements a Go pretty-printer (like package "go/format") that also adds or removes import statements as necessary.
|
Package imports implements a Go pretty-printer (like package "go/format") that also adds or removes import statements as necessary. |
|
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 |
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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. |
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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. |
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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. |
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engine/dockerauth
Package dockerauth handles storing auth configuration information for Docker registries.
|
Package dockerauth handles storing auth configuration information for Docker registries. |
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engine/dockerauth/ecs
Package credentialprovider provides a credential provider as defined in Kubernetes's 'credentialprovider' package.
|
Package credentialprovider provides a credential provider as defined in Kubernetes's 'credentialprovider' package. |
|
engine/dockerclient
Package dockerclient contains code dealing closely with the go-dockerclient package
|
Package dockerclient contains code dealing closely with the go-dockerclient package |
|
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. |
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sighandlers
sighandlers handle signals and behave appropriately.
|
sighandlers handle signals and behave appropriately. |
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sighandlers/exitcodes
Package exitcodes defines agent exit codes
|
Package exitcodes defines agent exit codes |
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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. |
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utils/atomic
Package atomic implements higher level constructs on top of the stdlib atomic package
|
Package atomic implements higher level constructs on top of the stdlib atomic package |
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utils/sync
Package sync is an analogue to the stdlib sync package.
|
Package sync is an analogue to the stdlib sync package. |
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utils/ttime
Package ttime implements a testable alternative to the Go "time" package.
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Package ttime implements a testable alternative to the Go "time" package. |
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version
Package version contains constants to indicate the current version of the agent.
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Package version contains constants to indicate the current version of the agent. |
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wsclient
Package wsclient wraps the generated aws-sdk-go client to provide marshalling and unmarshalling of data over a websocket connection in the format expected by backend.
|
Package wsclient wraps the generated aws-sdk-go client to provide marshalling and unmarshalling of data over a websocket connection in the format expected by backend. |
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misc
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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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