借助工具優化Dockerfile分層功能介紹官方的實例

發布時間：2023-07-03 10:55:51 作者：網友整理

借助工具優化Dockerfile分層

今天分享給大家一個工具：minid

工具下載直接訪問github搜索：minid

功能介紹

借助該工具可以優化Dockerfile，將Dockerfile的分層減少，從而達到使鏡像變小的目的

該工具主要是分析RUN,ENV等指令，將能合并分層的指令進行自動化分層，比如：

RUN cd /path/to/dir

RUN yum install Python

兩條指令可以合并為：

RUN cd /path/to/dir && yum install python

官方的實例

$ cat Dockerfile # 8 layers
FROM golang:1.10-alpine3.8 AS build
ENV DEP_VERSION 0.4.1
WORKDIR /go/src/github.com/orisano/gobase
RUN apk add --no-cache git make mailcap tzdata
RUN wget -O /usr/local/bin/dep https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 && chmod +x /usr/local/bin/dep
RUN wget -O /usr/local/bin/depinst https://github.com/orisano/depinst/releases/download/1.0.1/depinst-linux-amd64 && chmod +x /usr/local/bin/depinst
COPY Gopkg.lock Gopkg.toml ./
RUN dep ensure -vendor-only
ENV CGO_ENABLED=0
ENV GO_LDFLAGS="-extldflags='-static'"
RUN go build -i ./vendor/...
COPY . .
RUN make build

$ minid # 6 layers
FROM golang:1.10-alpine3.8 AS build
ENV DEP_VERSION=0.4.1
WORKDIR /go/src/github.com/orisano/gobase
RUN apk add --no-cache git make mailcap tzdata && wget -O /usr/local/bin/dep https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 && chmod +x /usr/local/bin/dep && wget -O /usr/local/bin/depinst https://github.com/orisano/depinst/releases/download/1.0.1/depinst-linux-amd64 && chmod +x /usr/local/bin/depinst
COPY Gopkg.lock Gopkg.toml ./
RUN dep ensure -vendor-only
ENV CGO_ENABLED=0 GO_LDFLAGS="-extldflags='-static'"
RUN go build -i ./vendor/...
COPY . .
RUN make build

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標簽：分層 Dockerfile