00d102da9f
Kubelet sends the PullImage request without timeout, because the image size is unknown and timeout is hard to defined. The pulling request might run into 0B/s speed, if containerd can't receive any packet in that connection. For this case, the containerd should cancel the PullImage request. Although containerd provides ingester manager to track the progress of pulling request, for example `ctr image pull` shows the console progress bar, it needs more CPU resources to open/read the ingested files to get status. In order to support progress timeout feature with lower overhead, this patch uses http.RoundTripper wrapper to track active progress. That wrapper will increase active-request number and return the countingReadCloser wrapper for http.Response.Body. Each bytes-read can be count and the active-request number will be descreased when the countingReadCloser wrapper has been closed. For the progress tracker, it can check the active-request number and bytes-read at intervals. If there is no any progress, the progress tracker should cancel the request. NOTE: For each blob data, the containerd will make sure that the content writer is opened before sending http request to the registry. Therefore, the progress reporter can rely on the active-request number. fixed: #4984 Signed-off-by: Wei Fu <fuweid89@gmail.com>
24 lines
779 B
Go
24 lines
779 B
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package integration
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import (
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// Register for linux platforms
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_ "github.com/containerd/containerd/runtime/v1/linux"
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_ "github.com/containerd/containerd/snapshots/overlay/plugin"
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)
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