#update apk for installRUN apk update#install ansible and opensshRUN apk add ansible openssh#init ansible hosts fileRUN mkdir -p /etc/ansibleRUN echo "localhost" >/etc/ansible/hosts#init rsa ssh key pairRUN ssh-keygen -t rsa -P "" -f ~/.ssh/id_rsa#delete cache files RUN rm -rf /var/cache/apk/*

[root@occluster ~]# docker pull liumiaocn/ansibleUsing default tag: latestTrying to pull repository docker.io/liumiaocn/ansible ... latest: Pulling from docker.io/liumiaocn/ansibleff3a5c916c92: Already exists 42a81541f983: Pull complete 86602ac17bcb: Pull complete 73cb14e49a3f: Pull complete bdfcad59d746: Pull complete 455ffeaa5bf1: Pull complete dff32643cfa5: Pull complete Digest: sha256:46284f3d3b9e3880f9b65fa6b1fb225b19bc88222badf74aa85936aabc24090fStatus: Downloaded newer image for docker.io/liumiaocn/ansible:latest[root@occluster ~]# [root@occluster ~]# docker images |grep ansibledocker.io/liumiaocn/ansible         latest       8a5cfdf8243f    Less than a second ago  103 MB[root@occluster ~]#

[root@occluster ~]# docker run -it --name ansible liumiaocn/ansible sh/ # ansible --versionansible 2.4.1.0 config file = None configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules'] ansible python module location = /usr/lib/python2.7/site-packages/ansible executable location = /usr/bin/ansible python version = 2.7.14 (default, Dec 14 2017, 15:51:29) [GCC 6.4.0]/ #

/ # ssh-copy-id 192.168.163.172/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"The authenticity of host '192.168.163.172 (192.168.163.172)' can't be established.ECDSA key fingerprint is SHA256:uh84Xw56LhiCXb1b0uFbX/CoFhkqHGZjtmLwl3qkTOY.Are you sure you want to continue connecting (yes/no)? yes/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installedexpr: warning: '^ERROR: ': using '^' as the first characterof a basic regular expression is not portable; it is ignored/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keysroot@192.168.163.172's password: Number of key(s) added: 1Now try logging into the machine, with:  "ssh '192.168.163.172'"and check to make sure that only the key(s) you wanted were added./ #

/ # ssh 192.168.163.172 hostnameoccluster/ #

/ # echo "192.168.163.172" >>/etc/ansible/hosts/ # ansible 192.168.163.172 -m ping192.168.163.172 | SUCCESS => {  "changed": false,   "failed": false,   "ping": "pong"}/ #