private void DeleteImage(DockerImageNode image, string repoTag)
{
var imageShortId = DockerImageNode.GetImageShortId(image.InspectResponse.ID);
var imageRepoTag = repoTag ?? "<none>";
Console.WriteLine($"[{DateTime.UtcNow.ToString()} UTC] Preparing to delete image: {imageShortId} ({imageRepoTag})");
// Delete image
if (!string.IsNullOrEmpty(repoTag))
{
_dockerClient.Images.DeleteImageAsync($"{imageRepoTag}", new ImageDeleteParameters()
{
Force = false, PruneChildren = true
}).Wait();
}
else
{
_dockerClient.Images.DeleteImageAsync(image.InspectResponse.ID, new ImageDeleteParameters()
{
Force = false, PruneChildren = true
}).Wait();
}
Console.WriteLine($"[{DateTime.UtcNow.ToString()} UTC] Image deleted: {imageShortId} ({imageRepoTag})");
}
private void DeleteImages(IList <DockerImageNode> images)
{
var recycledDiskSize = 0L;
var deletedImages = 0;
var dic = new Dictionary <string, int>();
foreach (var image in images)
{
var imageShortId = DockerImageNode.GetImageShortId(image.InspectResponse.ID);
var imageRepoTags = image.InspectResponse.RepoTags;
try
{
// Remove containers in black list states
StopAndRemoveContainers(image);
// Delete tagged image references
foreach (var repoTag in imageRepoTags)
{
DeleteImage(image, repoTag);
}
// Delete untagged image
if (imageRepoTags.Count() == 0)
{
DeleteImage(image, null);
}
recycledDiskSize += image.DiskSize;
deletedImages++;
}
// If container created before we delete the image, docker will throw exception
// In this case, we catch the exception here but keep on deleting
catch (Exception e)
{
Console.Error.WriteLine($"[{DateTime.UtcNow.ToString()} UTC] {e}");
}
}
Console.WriteLine($"[{DateTime.UtcNow.ToString()} UTC] {deletedImages} images deleted (total of {(int)(recycledDiskSize / (1024 * 1024))} MB)");
_logger.LogCounter("images-recycled-count", deletedImages);
_logger.LogCounter("disk-space-recycled-mb", (int)(recycledDiskSize / (1024 * 1024)));
}
private void _printDependencyGraph(DockerImageNode node, IList <DockerImageNode> highlights, IMatchlist containerStateBlacklist, int indentOffset = 0, int indent = 2, string highlightMarker = "<---")
{
Console.Write(_indent(indentOffset) + $"Image: {DockerImageNode.GetImageShortId(node.InspectResponse.ID)} ({node.InspectResponse.RepoTags.FirstOrDefault() ?? "<none>"}) {(int)((DateTime.UtcNow - node.InspectResponse.Created).TotalDays)} days {node.DiskSize/(1024*1024)} MB ");
if (node.Containers.Count > 0)
{
Console.Write($"({node.GetContainerCount() - node.GetContainerCount(containerStateBlacklist)}/{node.Containers.Count}) ");
}
if (highlights.Any(i => string.Equals(i.InspectResponse.ID, node.InspectResponse.ID, StringComparison.InvariantCultureIgnoreCase)))
{
Console.Write($"{highlightMarker} {highlights.IndexOf(node) + 1}");
}
Console.WriteLine();
foreach (var child in node.Children)
{
_printDependencyGraph(child, highlights, containerStateBlacklist, indentOffset + indent);
}
}
private void StopAndRemoveContainers(DockerImageNode image)
{
var imageShortId = DockerImageNode.GetImageShortId(image.InspectResponse.ID);
// Remove containers in black list states
foreach (var container in image.Containers)
{
var status = _dockerClient.Containers.InspectContainerAsync(container.ID).Result.State.Status;
// If container state changed and not in black list states, we should skip deleting
if (!_containerStateBlacklist.Match(status))
{
throw new Exception($"Postponed deletion for image: {imageShortId} due to container status change");
}
else
{
Console.WriteLine($"[{DateTime.UtcNow.ToString()} UTC] Stop and remove container: {container.ID} using image: {imageShortId}");
_dockerClient.Containers.StopContainerAsync(container.ID, new ContainerStopParameters()).Wait();
_dockerClient.Containers.RemoveContainerAsync(container.ID, new ContainerRemoveParameters()
{
Force = false, RemoveLinks = false, RemoveVolumes = false
}).Wait();
}
}
}
