在alpine镜像中添加ansible服务的方法

使用apk add ansible即可在alpine镜像中添加ansible服务。

添加步骤

在alpine中使用ansible需要如下几步

dockerfile

在dockerfile中添加上面的语句：

#update apk for install
run apk update
#install ansible and openssh
run apk add ansible openssh
#init ansible hosts file
run mkdir -p /etc/ansible
run echo "localhost" >/etc/ansible/hosts
#init rsa ssh key pair
run ssh-keygen -t rsa -p "" -f ~/.ssh/id_rsa
#delete cache files 
run rm -rf /var/cache/apk/*

使用镜像

拉取镜像

大概103m左右

[root@occluster ~]# docker pull liumiaocn/ansible
using default tag: latest
trying to pull repository docker.io/liumiaocn/ansible ... 
latest: pulling from docker.io/liumiaocn/ansible
ff3a5c916c92: already exists 
42a81541f983: pull complete 
86602ac17bcb: pull complete 
73cb14e49a3f: pull complete 
bdfcad59d746: pull complete 
455ffeaa5bf1: pull complete 
dff32643cfa5: pull complete 
digest: sha256:46284f3d3b9e3880f9b65fa6b1fb225b19bc88222badf74aa85936aabc24090f
status: downloaded newer image for docker.io/liumiaocn/ansible:latest
[root@occluster ~]# 
[root@occluster ~]# docker images |grep ansible
docker.io/liumiaocn/ansible         latest       8a5cfdf8243f    less than a second ago  103 mb
[root@occluster ~]#

使用

进行版本确认

[root@occluster ~]# docker run -it --name ansible liumiaocn/ansible sh
/ # ansible --version
ansible 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]
/ #

与宿主机(192.168.163.172)进行沟通，事先设定ssh通路，可以使用ssh-copy-id

/ # 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 installed
expr: warning: '^error: ': using '^' as the first character
of 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 keys
root@192.168.163.172's password: 
number of key(s) added: 1
now 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通路确认

/ # ssh 192.168.163.172 hostname
occluster
/ #

ansible动作确认

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

总结

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