| 導讀 | 在本篇文章裏小編給大家分享的是關於docker容器調用yum報錯的解決辦法，有興趣的朋友們可以參考下。 |
dockerfile裏或者在容器裏執行yum，報錯，找不到源(invalid baseurl xxx)，但是宿主機上執行yum是沒問題的啊，爲什麼？
因爲不論是dockerfile使用RUN關鍵字執行yum還是直接進入到容器裏面執行yum，它們都是使用的docker鏡像裏面的源(CentOS是在路徑/etc/yum.repo.d/CentOS-Base.repo)，所以你要把宿主機上的同路徑下的源拷貝到容器裏面，然後docker commit一個新的“基礎鏡像”，這個時候使用docker build xxx(即使用Dockerfile的方式)就不會報錯了。
拷貝方法docker cp xxx xxx
dockerfile中執行yum操作報錯
我們先看下報錯信息：
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
這個你在resolv.conf文件里加上 DNS服務就行了 這個文件在/etc下， 加上
nameserver 8.8.8.8 nameserver 8.8.4.4 search localdomain
就行了
到此這篇關於docker容器調用yum報錯的解決辦法的文章就介紹到這了。