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Docker使用yum報(bào)錯(cuò)解決方法
dockerfile里或者在容器里執(zhí)行yum，報(bào)錯(cuò)，找不到源(invalid baseurl xxx)，但是宿主機(jī)上執(zhí)行yum是沒問題的啊，為什么？
因?yàn)椴徽撌莇ockerfile使用RUN關(guān)鍵字執(zhí)行yum還是直接進(jìn)入到容器里面執(zhí)行yum，它們都是使用的docker鏡像里面的源(CentOS是在路徑/etc/yum.repo.d/CentOS-Base.repo)，所以你要把宿主機(jī)上的同路徑下的源拷貝到容器里面，然后docker commit一個(gè)新的“基礎(chǔ)鏡像”，這個(gè)時(shí)候使用docker build xxx(即使用Dockerfile的方式)就不會(huì)報(bào)錯(cuò)了。
拷貝方法docker cp xxx xxx
dockerfile中執(zhí)行yum操作報(bào)錯(cuò)
我們先看下報(bào)錯(cuò)信息：
Sending build context to Docker daemon 9.363 MB
Step 1 : FROM docker.io/centos
---> 196e0ce0c9fb
Step 2 : MAINTAINER liuliangliang
---> Using cache
---> 7d7e06799c20
Step 3 : ADD file/tomcat7.tgz /usr/local/
---> Using cache
---> 10ffdea53a02
Step 4 : RUN yum install java-1.8.0-openjdk -y
---> Running in 7824a339e077
Loaded plugins: fastestmirror, ovl
One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Run the command with the repository temporarily disabled yum --disablerepo= ... 4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable
or
subscription-manager repos --disable=
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=.skip_if_unavailable=true
Cannot find a valid baseurl for repo: base/7/x86_64
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
The command '/bin/sh -c yum install java-1.8.0-openjdk -y' returned a non-zero code: 1
解決方法
這個(gè)你在resolv.conf文件里加上 DNS服務(wù)就行了 這個(gè)文件在/etc下， 加上
nameserver 8.8.8.8
nameserver 8.8.4.4
search localdomain
就行了
到此這篇關(guān)于docker容器調(diào)用yum報(bào)錯(cuò)的解決辦法的文章就介紹到這了。
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