From 626b9ebc72fd825bea8e787f80f02d0c05864529 Mon Sep 17 00:00:00 2001 From: DarkSun Date: Tue, 26 Nov 2019 00:52:51 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98:=2020191125=20How=20to=20Ins?= =?UTF-8?q?tall=20Ansible=20(Automation=20Tool)=20on=20CentOS=208/RHEL=208?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sources/tech/20191125 How to Install Ansible (Automation Tool) on CentOS 8-RHEL 8.md --- ...le (Automation Tool) on CentOS 8-RHEL 8.md | 209 ++++++++++++++++++ 1 file changed, 209 insertions(+) create mode 100644 sources/tech/20191125 How to Install Ansible (Automation Tool) on CentOS 8-RHEL 8.md diff --git a/sources/tech/20191125 How to Install Ansible (Automation Tool) on CentOS 8-RHEL 8.md b/sources/tech/20191125 How to Install Ansible (Automation Tool) on CentOS 8-RHEL 8.md new file mode 100644 index 0000000000..d23a8aaf52 --- /dev/null +++ b/sources/tech/20191125 How to Install Ansible (Automation Tool) on CentOS 8-RHEL 8.md @@ -0,0 +1,209 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (How to Install Ansible (Automation Tool) on CentOS 8/RHEL 8) +[#]: via: (https://www.linuxtechi.com/install-ansible-centos-8-rhel-8/) +[#]: author: (Pradeep Kumar https://www.linuxtechi.com/author/pradeep/) + +How to Install Ansible (Automation Tool) on CentOS 8/RHEL 8 +====== + +**Ansible** is an awesome automation tool for Linux sysadmins. It is an open source configuration tool which allows sysadmins to manage hundreds of servers from one centralize node i.e **Ansible Server**. Ansible is the preferred configuration tool when it is compared with similar tools like **Puppet**, **Chef** and **Salt** because it doesn’t need any agent and it works on SSH and python. + +[![Install-Ansible-CentOS8-RHEL8][1]][2] + +In this tutorial we will learn how to install and use Ansible on CentOS 8 and RHEL 8 system + +Ansible Lab Details: + + * Minimal CentOS 8 / RHEL 8 Server (192.168.1.10) with Internet Connectivity + * Two Ansible Nodes – Ubuntu 18.04 LTS (192.168.1.20) & CentOS 7 (192.168.1.30) + + + +### Ansible Installation steps on CentOS 8  + +Ansible package is not available in default CentOS 8 package repository. so we need to enable [EPEL Repository][3] by executing the following command, + +``` +[root@linuxtechi ~]$ sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm -y +``` + +Once the epel repository is enabled, execute the following dnf command to install Ansible + +``` +[root@linuxtechi ~]$ sudo dnf install ansible +``` + +Output of above command : + +![dnf-install-ansible-centos8][1] + +Once the ansible is installed successfully, verify its version by running the following command + +``` +[root@linuxtechi ~]$ sudo ansible --version +``` + +![Ansible-version-CentOS8][1] + +Above output confirms that Installation is completed successfully on CentOS 8. + +Let’s move to RHEL 8 system + +### Ansible Installation steps on RHEL 8 + +If you have a valid RHEL 8 subscription then use following subscription-manager command to enable Ansible Repo, + +``` +[root@linuxtechi ~]$ sudo subscription-manager repos --enable ansible-2.8-for-rhel-8-x86_64-rpms +``` + +Once the repo is enabled then execute the following dnf command to install Ansible, + +``` +[root@linuxtechi ~]$ sudo dnf install ansible -y +``` + +Once the ansible and its dependent packages are installed then verify ansible version by executing the following command, + +``` +[root@linuxtechi ~]$ sudo ansible --version +``` + +### Alternate Way to Install Ansible via pip3 on CentOS 8 / RHEL 8 + +If you wish to install Ansible using **pip** (**python’s package manager**) then first install pyhton3 and python3-pip packages using following command, + +``` +[root@linuxtechi ~]$ sudo dnf install python3 python3-pip -y +``` + +After pyhthon3 installation, verify its version by running + +``` +[root@linuxtechi ~]$ python3 -V +Python 3.6.8 +[root@linuxtechi ~]$ +``` + +Now run below pip3 command to install Ansible, + +``` +[root@linuxtechi ~]$ pip3 install ansible --user +``` + +Output, + +![Ansible-Install-pip3-centos8][1] + +Above output confirms that Ansible has been installed successfully using pip3. Let’s see how we can use Ansible + +### How to Use Ansible Automation Tool? + +When we install Ansible using yum or dnf command then its configuration file, inventory file and roles directory created automatically under /etc/ansible folder. + +So, let’s add a group with name “**labservers**” and under this group add ubuntu 18.04 and CentOS 7 System’s ip address in **/etc/ansible/hosts** file + +``` +[root@linuxtechi ~]$ sudo vi /etc/ansible/hosts +… +[labservers] +192.168.1.20 +192.168.1.30 +… +``` + +Save & exit file. + +Once the inventory file (/etc/ansible/hosts) is updated then exchange your user’s ssh public keys with remote systems which are part of “labservers” group. + +Let’s first generate your local user’s public and private key using ssh-keygen command, + +``` +[root@linuxtechi ~]$ ssh-keygen +``` + +Now exchange public key between the ansible server and its clients using the following command, + +``` +[root@linuxtechi ~]$ ssh-copy-id root@linuxtechi +[root@linuxtechi ~]$ ssh-copy-id root@linuxtechi +``` + +Now let’s try couple of Ansible commands, first verify the connectivity from Ansible server to its clients using ping module, + +``` +[root@linuxtechi ~]$ ansible -m ping "labservers" +``` + +**Note:** If we don’t specify the inventory file in above command then it will refer the default hosts file (i.e /etc/ansible/hosts) + +Output, + +![ansible-ping-module-centos8][1] + +Let’s check kernel version of each client using Ansible shell command, + +``` +[root@linuxtechi ~]$ ansible -m command -a "uname -r" "labservers" +192.168.1.30 | CHANGED | rc=0 >> +4.15.0-20-generic +192.168.1.20 | CHANGED | rc=0 >> +3.10.0-327.el7.x86_64 +[root@linuxtechi ~]$ +``` + +Use the following ansible command to list all hosts from the inventory file, + +``` +[root@linuxtechi ~]$ ansible all -i /etc/ansible/hosts --list-hosts + hosts (4): + 192.168.100.1 + 192.168.100.10 + 192.168.1.20 + 192.168.1.30 +[root@linuxtechi ~]$ +``` + +Use the following ansible command to list only hosts from “labservers” group + +``` +root@linuxtechi ~]$ ansible labservers -i /etc/ansible/hosts --list-hosts + hosts (2): + 192.168.1.20 + 192.168.1.30 +[root@linuxtechi ~]$ +``` + +That’s all from this article, we have successfully demonstrated on how to install and use Ansible on CentOS 8 and RHEL 8 System. Please do you share your feedback and comments. + + * [Facebook][4] + * [Twitter][5] + * [LinkedIn][6] + * [Reddit][7] + + + +-------------------------------------------------------------------------------- + +via: https://www.linuxtechi.com/install-ansible-centos-8-rhel-8/ + +作者：[Pradeep Kumar][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.linuxtechi.com/author/pradeep/ +[b]: https://github.com/lujun9972 +[1]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 +[2]: http://www.linuxtechi.com/wp-content/uploads/2019/11/Install-Ansible-CentOS8-RHEL8.png +[3]: http://www.linuxtechi.com/enable-epel-repo-centos8-rhel8-server/ +[4]: http://www.facebook.com/sharer.php?u=https%3A%2F%2Fwww.linuxtechi.com%2Finstall-ansible-centos-8-rhel-8%2F&t=How%20to%20Install%20Ansible%20%28Automation%20Tool%29%20on%20CentOS%208%2FRHEL%208 +[5]: http://twitter.com/share?text=How%20to%20Install%20Ansible%20%28Automation%20Tool%29%20on%20CentOS%208%2FRHEL%208&url=https%3A%2F%2Fwww.linuxtechi.com%2Finstall-ansible-centos-8-rhel-8%2F&via=Linuxtechi +[6]: http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.linuxtechi.com%2Finstall-ansible-centos-8-rhel-8%2F&title=How%20to%20Install%20Ansible%20%28Automation%20Tool%29%20on%20CentOS%208%2FRHEL%208 +[7]: http://www.reddit.com/submit?url=https%3A%2F%2Fwww.linuxtechi.com%2Finstall-ansible-centos-8-rhel-8%2F&title=How%20to%20Install%20Ansible%20%28Automation%20Tool%29%20on%20CentOS%208%2FRHEL%208