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版本：v2.0.9

Oras 资源客户端模式

Oras 资源客户端​

使用 oras 的资源客户端使用 Dragonfly 拉取镜像。

通过 Dragonfly 资源客户端拉取镜像的这种方法比代理方法相比更加高效，因为它避免了 TLS，减少了 CPU 资源使用量和下载时间， 因为它在首次从源下载镜像后为后续文件下载创建了硬链接，而不是复制一份完全一样的资源。

快速开始​

步骤 1: 配置 dfdaemon​

下面为镜像仓库的 dfdaemon 配置，在路径 /etc/dragonfly/dfget.yaml:

# Peer task storage option.
storage:
  # Task data expire time,
  # when there is no access to a task data, this task will be gc.
  taskExpireTime: 6h
  strategy: io.d7y.storage.v2.advance.
  # Disk quota gc threshold, when the quota of all tasks exceeds the gc threshold, the oldest tasks will be reclaimed.
  diskGCThreshold: 50Gi
  # Disk used percent gc threshold, when the disk used percent exceeds, the oldest tasks will be reclaimed.
  # eg, diskGCThresholdPercent=80, when the disk usage is above 80%, start to gc the oldest tasks.
  diskGCThresholdPercent: 80
  # Set to ture for reusing underlying storage for same task id.
  multiplex: true

# The singularity oras resources, most of it is same with https scheme
oras:
  proxy:
  dialTimeout: 30s
  keepAlive: 30s
  maxIdleConns: 100
  idleConnTimeout: 90s
  responseHeaderTimeout: 30s
  tlsHandshakeTimeout: 30s
  expectContinueTimeout: 10s
  insecureSkipVerify: true

步骤 2: 使用 oras 资源客户端下载镜像​

使用以下命令拉取镜像:

dfget -u "oras://hostname/path/image:tag" -O /path/to/output

步骤 3: 验证 Dragonfly 拉取成功​

可以查看日志，判断镜像正常拉取。

grep "peer task done" /var/log/dragonfly/daemon/core.log

如果正常日志输出如下:

{
   "level":"info",
   "ts":"2022-09-07 12:04:26.485",
   "caller":"peer/peertask_conductor.go:1500",
   "msg":"peer task done, cost: 1ms",
   "peer":"00.000.0.000-5184-1eab18b6-bead-4a9f-b055-abcdefghihkl",
   "task":"b223b11dcb7ad19e3cfc4cg8e5af3b1699a597e974c737bb4004edeefabcdefgh",
   "component":"PeerTask"
}