我想要减小我的Docker镜像大小,于是换成了基于Alpine的镜像。结果出现了bash找不到apt的问题。原来,我需要使用apk代替apt。然而,似乎无法找到我所需的Java版本。以下是我的Dockerfile:
#Use alpine golang
FROM golang:alpine
#Get the code from local code commit repo
WORKDIR /go/src/xxx
COPY . /go/src/xxx
#Install Java and cleanup after in the same layer
RUN apk update && apk add openjdk-8-jre-headless && rm -rf /var/lib/apt/lists/*
#Install dependencies recursively and remove the third_party directory after it has been used for compiling.
RUN go get ./... && go run setup.go && RUN rm -rf third_party
#More commands...
---> 32a6b6b5f196
Step 4/8 : RUN apk update && apk add openjdk-8-jre-headless && rm -rf /var/lib/apt/lists/*
---> Running in bc48930e48be
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/community/x86_64/APKINDEX.tar.gz
v3.9.4-4-gd5dd5c1cd0 [http://dl-cdn.alpinelinux.org/alpine/v3.9/main]
v3.9.4-5-gcfdf5452f1 [http://dl-cdn.alpinelinux.org/alpine/v3.9/community]
OK: 9766 distinct packages available
openjdk-8-jre-headless (missing):
·[91mERROR: unsatisfiable constraints:
·[0m required by: world[openjdk-8-jre-headless]
The command '/bin/sh -c apk update && apk add openjdk-8-jre-headless && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 1
我也尝试过
RUN apk update && apk add -t jessie-backports openjdk-8-jre-headless ca-certificates-java && rm -rf /var/lib/apt/lists/*
根据https://unix.stackexchange.com/questions/342403/openjdk-8-jre-headless-depends-ca-certificates-java-but-it-is-not-going-to-be的说法,但那也失败了,不确定是否是-t标志的问题:
Step 4/7 : RUN apk update && apk add -t jessie-backports openjdk-8-jre-headless ca-certificates-java && rm -rf /var/lib/apt/lists/*
---> Running in 1e2ef22e7c16
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.9/community/x86_64/APKINDEX.tar.gz
v3.9.4-4-gd5dd5c1cd0 [http://dl-cdn.alpinelinux.org/alpine/v3.9/main]
v3.9.4-5-gcfdf5452f1 [http://dl-cdn.alpinelinux.org/alpine/v3.9/community]
OK: 9766 distinct packages available
·[91mERROR: unsatisfiable constraints:
·[0m openjdk-8-jre-headless (missing):
required by: jessie-backports-0[openjdk-8-jre-headless]
ca-certificates-java (missing):
required by: jessie-backports-0[ca-certificates-java]
The command '/bin/sh -c apk update && apk add -t jessie-backports openjdk-8-jre-headless ca-certificates-java && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 3
apk add --no-cache openjdk8
就足够了。8.212.04-r0
是当前最新版本。 - valianoopenjdk8
版本是8.212.04-r0
,因此不能指定其他版本,一旦更新了openjdk8
软件包,docker 构建将会中断。 - valiano