關(guān)鍵詞：docker buildx cache gc prune 構(gòu)建 緩存 策略 緩存時間 緩存大小

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新建buildkit配置文件$HOME/.docker/buildx/buildkitd.default.toml如下：

[worker.oci]
  enabled = true
  gc = true
  gckeepstorage = 20480     # 單位：MiB
  [[worker.oci.gcpolicy]]
    keepBytes = 21474836480 # 單位：B，下同
    keepDuration = 7200     # 單位：s，下同
    filters = [ "type==source.local", "type==exec.cachemount", "type==source.git.checkout"]
  [[worker.oci.gcpolicy]]
    keepBytes = 32212254720
    keepDuration = 86400
    filters = [ "type==source.local", "type==exec.cachemount", "type==source.git.checkout"]
  [[worker.oci.gcpolicy]]
    all = true
    keepBytes = 42949672960

上述配置可以按時間打洼、按上限設(shè)置多個層級的worker.oci.gcpolicy凝颇，按照不同時間婶芭、不同上限來刪除buildx的構(gòu)建緩存纤勒。如果是本地構(gòu)建牢裳，主要的緩存類型是source.local和exec.cachemount逢防。詳細(xì)配置請見：buildkit。

如果之前創(chuàng)建過名為builder的實例蒲讯，先刪除：

docker buildx rm builder

然后重新創(chuàng)建一個名為builder的實例：

docker run --privileged --rm tonistiigi/binfmt --install all
docker buildx create --name builder --driver=docker-container --use --bootstrap
docker buildx inspect

上面最后一個命令docker buildx inspect輸出如下：

Name:          builder
Driver:        docker-container
Last Activity: 2023-09-06 02:55:47 +0000 UTC

Nodes:
Name:      builder0
Endpoint:  unix:///var/run/docker.sock
Status:    running
Buildkit:  v0.12.1
Platforms: linux/amd64, linux/amd64/v2, linux/amd64/v3, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/mips64le, linux/mips64, linux/arm/v7, linux/arm/v6
Labels:
 org.mobyproject.buildkit.worker.executor:         oci
 org.mobyproject.buildkit.worker.hostname:         bcff51b12dca
 org.mobyproject.buildkit.worker.network:          host
 org.mobyproject.buildkit.worker.oci.process-mode: sandbox
 org.mobyproject.buildkit.worker.selinux.enabled:  false
 org.mobyproject.buildkit.worker.snapshotter:      overlayfs
GC Policy rule#0:
 All:           false
 Filters:       type==source.local type==exec.cachemount type==source.git.checkout
 Keep Duration: 2h0m0s
 Keep Bytes:    20GiB
GC Policy rule#1:
 All:           false
 Filters:       type==source.local type==exec.cachemount type==source.git.checkout
 Keep Duration: 24h0m0s
 Keep Bytes:    30GiB
GC Policy rule#2:
 All:        true
 Keep Bytes: 40GiB

可以看出緩存策略已經(jīng)設(shè)置為自己的了忘朝。