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Container.cs
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Container.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Docker.DotNet;
using Docker.DotNet.Models;
using Microsoft.Extensions.Logging;
namespace TestEnvironment.Docker
{
public class Container : IDependency
{
private readonly IContainerWaiter _containerWaiter;
private readonly IContainerInitializer _containerInitializer;
private readonly IContainerCleaner _containerCleaner;
private readonly bool _reuseContainer;
public Container(
DockerClient dockerClient,
string name,
string imageName,
string tag = "latest",
IDictionary<string, string> environmentVariables = null,
IDictionary<ushort, ushort> ports = null,
bool isDockerInDocker = false,
bool reuseContainer = false,
IContainerWaiter containerWaiter = null,
IContainerCleaner containerCleaner = null,
ILogger logger = null,
IList<string> entrypoint = null,
IContainerInitializer containerInitializer = null)
{
Name = name;
DockerClient = dockerClient;
Logger = logger;
IsDockerInDocker = isDockerInDocker;
ImageName = imageName ?? throw new ArgumentNullException(nameof(imageName));
Tag = tag;
EnvironmentVariables = environmentVariables ?? new Dictionary<string, string>();
Ports = ports;
_containerWaiter = containerWaiter;
_containerInitializer = containerInitializer;
_containerCleaner = containerCleaner;
_reuseContainer = reuseContainer;
Entrypoint = entrypoint;
}
public bool IsDockerInDocker { get; }
public string Name { get; }
public string Id { get; private set; }
public string IPAddress { get; private set; }
public IDictionary<ushort, ushort> Ports { get; private set; }
public IList<string> Entrypoint { get; }
public string ImageName { get; }
public string Tag { get; }
public IDictionary<string, string> EnvironmentVariables { get; }
protected ILogger Logger { get; }
protected DockerClient DockerClient { get; }
public async Task Run(IDictionary<string, string> environmentVariables, CancellationToken token = default)
{
if (environmentVariables == null)
{
throw new ArgumentNullException(nameof(environmentVariables));
}
// Make sure that we don't try to add the same var twice.
var stringifiedVariables = EnvironmentVariables.MergeDictionaries(environmentVariables)
.Select(p => $"{p.Key}={p.Value}").ToArray();
await RunContainerSafely(stringifiedVariables, token);
if (_containerWaiter != null)
{
var isStarted = await _containerWaiter.Wait(this, token);
if (!isStarted)
{
Logger.LogError($"Container {Name} didn't start.");
throw new TimeoutException($"Container {Name} didn't start.");
}
}
if (_containerInitializer != null)
{
await _containerInitializer.Initialize(this, token);
}
if (_reuseContainer && _containerCleaner != null)
{
await _containerCleaner.Cleanup(this, token);
}
}
public Task Stop(CancellationToken token = default) =>
DockerClient.Containers.StopContainerAsync(Id, new ContainerStopParameters { }, token);
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
public async ValueTask DisposeAsync()
{
await DisposeAsync(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
if (!string.IsNullOrEmpty(Id))
{
DockerClient.Containers.RemoveContainerAsync(Id, new ContainerRemoveParameters { Force = true })
.Wait();
}
}
}
protected virtual async ValueTask DisposeAsync(bool disposing)
{
if (disposing)
{
if (!string.IsNullOrEmpty(Id))
{
await DockerClient.Containers.RemoveContainerAsync(
Id,
new ContainerRemoveParameters { Force = true });
}
}
}
protected virtual CreateContainerParameters GetCreateContainerParameters(string[] environmentVariables)
{
var createParams = new CreateContainerParameters
{
Name = Name,
Image = $"{ImageName}:{Tag}",
AttachStdout = true,
Env = environmentVariables,
Hostname = Name,
Domainname = Name,
HostConfig = new HostConfig
{
PublishAllPorts = Ports == null
}
};
if (Ports != null)
{
createParams.HostConfig.PortBindings = Ports
.ToDictionary(
p => $"{p.Key}/tcp",
p => (IList<PortBinding>)new List<PortBinding>
{ new PortBinding { HostPort = p.Value.ToString() } });
}
if (Entrypoint != null && Entrypoint.Any())
{
createParams.Entrypoint = Entrypoint;
}
return createParams;
}
private async Task RunContainerSafely(string[] environmentVariables, CancellationToken token = default)
{
// Try to find container in docker session
var startedContainer = await GetContainer(token);
// If container already exist - remove that
if (startedContainer != null)
{
// TODO: check status and network
if (!_reuseContainer)
{
await DockerClient.Containers.RemoveContainerAsync(
startedContainer.ID,
new ContainerRemoveParameters { Force = true },
token);
startedContainer = await CreateContainer(environmentVariables, token);
}
}
else
{
startedContainer = await CreateContainer(environmentVariables, token);
}
Logger.LogInformation($"Container '{Name}' has been run.");
Logger.LogDebug($"Container state: {startedContainer.State}");
Logger.LogDebug($"Container status: {startedContainer.Status}");
Logger.LogDebug(
$"Container IPAddress: {startedContainer.NetworkSettings.Networks.FirstOrDefault().Key} - {startedContainer.NetworkSettings.Networks.FirstOrDefault().Value.IPAddress}");
Id = startedContainer.ID;
IPAddress = startedContainer.NetworkSettings.Networks.FirstOrDefault().Value.IPAddress;
Ports = startedContainer.Ports.ToDictionary(p => p.PrivatePort, p => p.PublicPort);
}
private async Task<ContainerListResponse> CreateContainer(string[] environmentVariables, CancellationToken token)
{
// Create new container
var createParams = GetCreateContainerParameters(environmentVariables);
var container = await DockerClient.Containers.CreateContainerAsync(createParams, token);
// Run container
await DockerClient.Containers.StartContainerAsync(container.ID, new ContainerStartParameters(), token);
// Try to find container in docker session
return await GetContainer(token);
}
private async Task<ContainerListResponse> GetContainer(CancellationToken token)
{
var containerName = $"/{Name}";
var containers = await DockerClient.Containers.ListContainersAsync(
new ContainersListParameters
{
All = true,
Filters = new Dictionary<string, IDictionary<string, bool>>
{ ["name"] = new Dictionary<string, bool> { [containerName] = true } }
}, token);
return containers.FirstOrDefault(x => x.Names.Contains(containerName));
}
}
}