Install Master
CentOS 7
yum install https://repo.saltstack.com/yum/redhat/salt-repo-latest.el7.noarch.rpm yum install salt-master salt-minion salt-ssh salt-syndic salt-cloud salt-api
Add to autorun and run:
systemctl enable salt-master systemctl start salt-master
Installation may require dependencies in the EPEL repository.
yum install epel-release
Ubuntu – 18.04
wget -O - https://repo.saltstack.com/apt/ubuntu/18.04/amd64/latest/SALTSTACK-GPG-KEY.pub | sudo apt-key add - echo -e "deb http://repo.saltstack.com/apt/ubuntu/18.04/amd64/latest bionic main" > /etc/apt/sources.list.d/saltstack.list apt update apt install salt-master salt-minion salt-ssh salt-syndic salt-cloud salt-api
Add to autorun and run:
systemctl enable salt-master systemctl start salt-master
In Salt, the minions connect to the master, so it’s enough to open TCP ports 4505,4506 on the master for Saltstack to work.
Minion installation
CentOS:
yum install salt-minion salt-ssh
Ubuntu:
apt install salt-minion salt-ssh
Add to autorun and run:
systemctl enable salt-minion systemctl start salt-minion
Connection:
By default, the minions are looking for a wizard on the network named “salt“.
To change, either in the file “/etc/salt/minion” find the line:
#master: salt
Uncomment and change the name, or specify the IP address, then restart the minion, or write in the “/etc/hosts” record “salt” with the IP address of the master.
On the wizard, see the requests to add:
salt-key -L Accepted Keys: Denied Keys: Unaccepted Keys: ip-172-31-22-119.ec2.internal Rejected Keys:
And we see:
Unaccepted Keys: ip-172-31-22-119.ec2.internal
That one key is awaiting approval. To take all the keys at once, do:
salt-key -A
This is if you are sure that this is exactly your minions. If not, verify key prints.
Examples of simple commands.
salt '*' test.ping
We check the “alive” of all the minions, in response they should just send the answer “True”
ip-172-31-22-119.ec2.internal:
True
We execute the remote command on all the minions, in this case, this is the listing of the “/home” directory
salt '*' cmd.run 'ls -l /home/'
Install the package “vim” on all minions
salt '*' pkg.install vim