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A significant rewrite to ensure that we don't suffer from shutdown race conditions as the prune condition is met and additional resources are being created. Previously this would remove resources that were still in use, now we retry if we detect new resources have been created within a window of the prune condition triggering. This supports the following new environment configuration settings: - RYUK_REMOVE_RETRIES - The number of times to retry removing a resource. - RYUK_REQUEST_TIMEOUT - The timeout for any Docker requests. - RYUK_RETRY_OFFSET - The offset added to the start time of the prune pass that is used as the minimum resource creation time. - RYUK_SHUTDOWN_TIMEOUT - The duration after shutdown has been requested when the remaining connections are ignored and prune checks start. Update README to correct example, as health is only valid for containers not the other resources, so would cause failures. Enable race detection on CI tests.
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| vendor/ | ||
| bin/ | ||
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| # Binary | ||
| moby-ryuk | ||
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| # VS Code | ||
| .vscode | ||
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| # Moby Ryuk | ||
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| This project helps you to remove containers/networks/volumes/images by given filter after specified delay. | ||
| This project helps you to remove containers, networks, volumes and images by given filter after specified delay. | ||
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| # Usage | ||
| ## Building | ||
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| 1. Start it: | ||
| To build the binary only run: | ||
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| $ RYUK_PORT=8080 ./bin/moby-ryuk | ||
| $ # You can also run it with Docker | ||
| $ docker run -v /var/run/docker.sock:/var/run/docker.sock -e RYUK_PORT=8080 -p 8080:8080 testcontainers/ryuk:0.9.0 | ||
| ```shell | ||
| go build | ||
| ``` | ||
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| 1. Connect via TCP: | ||
| To build the Linux docker container as the latest tag: | ||
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| $ nc localhost 8080 | ||
| ```shell | ||
| docker build -f linux/Dockerfile -t testcontainers/ryuk:latest . | ||
| ``` | ||
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| 1. Send some filters: | ||
| ## Usage | ||
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| label=testing=true&health=unhealthy | ||
| ACK | ||
| label=something | ||
| ACK | ||
| To start it using the default settings: | ||
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| 1. Close the connection | ||
| ```shell | ||
| docker run -v /var/run/docker.sock:/var/run/docker.sock -p 8080:8080 testcontainers/ryuk:latest | ||
| ``` | ||
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| 1. Send more filters with "one-off" style: | ||
| If you want to test local changes with the default settings: | ||
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| printf "label=something_else" | nc localhost 8080 | ||
| ```shell | ||
| go run . | ||
| ``` | ||
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| 1. See containers/networks/volumes deleted after 10s: | ||
| You can then simulate a connection from testcontainer container using: | ||
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| 2018/01/15 18:38:52 Timed out waiting for connection | ||
| 2018/01/15 18:38:52 Deleting {"label":{"something":true}} | ||
| 2018/01/15 18:38:52 Deleting {"label":{"something_else":true}} | ||
| 2018/01/15 18:38:52 Deleting {"health":{"unhealthy":true},"label":{"testing=true":true}} | ||
| 2018/01/15 18:38:52 Removed 1 container(s), 0 network(s), 0 volume(s), 0 image(s) | ||
| ```shell | ||
| nc -N localhost 8080 << EOF | ||
| label=testing=true&label=testing.sessionid=mysession | ||
| label=something | ||
| EOF | ||
| ``` | ||
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| You can send additional session information for monitoring using: | ||
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| ```shell | ||
| printf "label=something_else" | nc -N localhost 8080 | ||
| ``` | ||
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| In the ryuk window you'll see containers/networks/volumes deleted after 10s | ||
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| ```log | ||
| 2018/01/15 18:38:52 Timed out waiting for connection | ||
| 2018/01/15 18:38:52 Deleting {"label":{"something":true}} | ||
| 2018/01/15 18:38:52 Deleting {"label":{"something_else":true}} | ||
| 2018/01/15 18:38:52 Deleting {"health":{"unhealthy":true},"label":{"testing=true":true}} | ||
| 2018/01/15 18:38:52 Removed 1 container(s), 0 network(s), 0 volume(s), 0 image(s) | ||
| ``` | ||
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| ## Ryuk configuration | ||
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| - `RYUK_CONNECTION_TIMEOUT` - Environment variable that defines the timeout for Ryuk to receive the first connection (default: 60s). Value layout is described in [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration) documentation. | ||
| - `RYUK_PORT` - Environment variable that defines the port where Ryuk will be bound to (default: 8080). | ||
| - `RYUK_RECONNECTION_TIMEOUT` - Environment variable that defines the timeout for Ryuk to reconnect to Docker (default: 10s). Value layout is described in [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration) documentation. | ||
| - `RYUK_VERBOSE` - Environment variable that defines if Ryuk should print debug logs (default: false). | ||
| The following environment variables can be configured to change the behaviour: | ||
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| | Environment Variable | Default | Format | Description | | ||
| | --------------------------- | ------- | ------- | ------------ | | ||
| | `RYUK_CONNECTION_TIMEOUT` | `60s` | [Duration](https://golang.org/pkg/time/#ParseDuration) | The duration without receiving any connections which will trigger a shutdown | | ||
| | `RYUK_PORT` | `8080` | `uint16` | The port to listen on for connections | | ||
| | `RYUK_RECONNECTION_TIMEOUT` | `10s` | [Duration](https://golang.org/pkg/time/#ParseDuration) | The duration after the last connection closes which will trigger resource clean up and shutdown | | ||
| | `RYUK_REQUEST_TIMEOUT` | `10s` | [Duration](https://golang.org/pkg/time/#ParseDuration) | The timeout for any Docker requests | | ||
| | `RYUK_REMOVE_RETRIES` | `10` | `int` | The number of times to retry removing a resource | | ||
| | `RYUK_RETRY_OFFSET` | `-1s` | [Duration](https://golang.org/pkg/time/#ParseDuration) | The offset added to the start time of the prune pass that is used as the minimum resource creation time. Any resource created after this calculated time will trigger a retry to ensure in use resources are not removed | | ||
| | `RYUK_VERBOSE` | `false` | `bool` | Whether to enable verbose aka debug logging | | ||
| | `RYUK_SHUTDOWN_TIMEOUT` | `10m` | [Duration](https://golang.org/pkg/time/#ParseDuration) | The duration after shutdown has been requested when the remaining connections are ignored and prune checks start | |
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| package main | ||
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| const ( | ||
| // labelBase is the base label for testcontainers. | ||
| labelBase = "org.testcontainers" | ||
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| // ryukLabel is the label used to identify reaper containers. | ||
| ryukLabel = labelBase + ".ryuk" | ||
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| // fieldError is the log field key for errors. | ||
| fieldError = "error" | ||
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| // fieldAddress is the log field a client or listening address. | ||
| fieldAddress = "address" | ||
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| // fieldClients is the log field used for client counts. | ||
| fieldClients = "clients" | ||
| ) |
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