May 14, 2020 salt is a new approach to infrastructure management built on a dynamic communication bus. The salt file server can be used for transferring the general file to salt minions from the saltmaster. The saltminion needs the saltmaster to run correctly. Suse linux enterprise server 11 sp3, sp4 all architectures suse linux enterprise server 12 ga, sp1, sp2, etc. Run below command from salt master to download the kb from microsoft website in all the saltstack windows minion servers. Id like to tell you that youre doing an excellent job with this book. Ran into an issue the other day when installing and registering a salt minion with its master. A salt file server is used for distributing files from master to minions. But you can create a saltstate, that will send a special shell command to the saltminion and execute it in the background. This will instruct all salt minions to download the vimrc file and copy it to etcvimrc. Saltstack is the easiest to work with and is incredibly useful during remediation of widespread infrastructure issues. Glob or regex to narrow down the files cached from the given path. Flexibility the best orchestration, configuration, doeverything platformperiod. This shell command will update and restart the saltminion service using the locally executed saltcall.
Saltstack concepts like master, minion, syndic, key management, runners, configurations, states and top file, eventbased execution, formulas. Changing name of saltminion my sys admin nightmare. The saltcp command can also be used to distribute files presented by the salt file server. The file path in the first line is simply the name of the reactor, and can be whatever you choose. Ive read all your posts related with salt, and all of them are very easy to understand for people that are beginners with these tools. Our load balancers need to be configured with the web server addresses in order to correctly pass traffic. Salt is a new approach to infrastructure management built on a dynamic. The salt master is configured via the master configuration file, and the salt minion is configured via the minion configuration file. Securely copy file from one salt minion to another server fault. Saltstack is the easiest to work with and is incredibly useful during remediation of widespread infrastructure. Use salt grains to identify minions uptime through simplicity.
Salt addresses this problem as well, the salt state system uses salt state files to define the state a server needs to be in. I dont believe that that will rename it on the server after being joined, but it is where you would start. I wrote a pythonboto script for launching our instances that shells our to saltkey genkeys and cps the key to the masters key dir and puts the keys in s3 bucket that the minion can download. Using salt python client api, is there a way to copy files form master to minion without using salt file server. Saltminion for suse sles 12 sp3 showing 110 of 10 messages. With this said, the salt file server can be used for any general file transfer.
As for how to get the file from the source minion to the master, the salt paradigm is more for the master to be the source of data. If you would like to run minion in its pure java form with out our java virtual machine this is the download for you. Create selfmanaging servers with masterless saltstack. The default config file is named minion located in c. The easiest way to set this up is to copy the contents of the salt\pkg\windows\buildenv directory to c. You can create a salt state that will add a grain to your minion for you and reference that in your top file. Now, restart the salt minion daemon to implement your new configuration changes. Salt requires a minion configuration file and a few other directories. It can either operate as a standalone daemon which accepts commands locally via saltcall or it can connect back to a master and receive commands remotely.
You can search for this value in vim using finger within the file. This is a feature that enables controlling devices that cannot run a standard salt minion. Simple file management in salt is trivial with the file. Salt master is part of the suse manager infrastructure set up for you by default uses srvsalt for userbased content supported salt minions. But you can create a salt state, that will send a special shell command to the salt minion and execute it in the background. Salt has a separate module, salt proxy minion that controls the remote system using the rest service running in the remote system. Using the salt python client api, is there a way to copy files from the master to minion without using salt file server.
Push a file from the minion up to the master, the file will. Defining custom salt grains in the minions minion file grains. The easiest way to set this up is to copy the contents of the salt \pkg\windows\buildenv directory to c. Once salt minion service started successfully, it sends off a signal to find the saltstack server. Existing salt states, configuration settings, and salt minion connections are.
This feature was added on a later version of salt, you can find it in the salt official documentation on this link you can push a file from a salt minion to the master by issuing this command. The tgt, or target, is the salt minion that will receive the highstate. Once saltminion service started successfully, it sends off a signal to find the saltstack server. It is defined as shown in the following code block. Salt can be used for datadriven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. This shell command will update and restart the salt minion service using the locally executed salt call. Rack 3 to make the new custom grains take effect, the saltminion service must be restarted after editing the minion file. Oct 05, 2015 now, restart the salt minion daemon to implement your new configuration changes. Here, what you have to do to copy just one file would be to use file. I want to remove only the unnecessary files while keeping the others, because my minions have limited resources limited hard drive space and cpumemory and are deployed remotely on 3g connection unstable link, expensive and limited bandwidth. Download a file from a url to the minion cache directory and return the. The salt minion needs the salt master to run correctly.
Mar 22, 2016 to alter the salt minion s configuration we can either edit the etc salt minion configuration file which is the default configuration file. Responsible for issuing instructions to the slaves and change them to the desired state after execution minion. Copy a file from salt master to minions stack overflow. The cp module is the home of minion side file server operations. How to copy file from master to minions on saltstack. The main intent of the salt file server is to present files for use in the salt state system. It is the controlled system which needs to be transformed into some desired state salt grains. Q3 state the finest way to restart a salt minion with salt after the upgrade. The salt minion receives commands from the central salt master and replies with the results of said commands. It can also be used in standalone mode to apply states to a machine without a master by using c.
I wrote a pythonboto script for launching our instances that shells our to salt key genkeys and cps the key to the masters key dir and puts the keys in s3 bucket that the minion can download. Stop the saltminion service service saltminion stop. All a top file does is define which salt states sls files should be applied to which servers. I could write a custom external pillar that somehow. Between the remote execution system, and state management salt addresses the backbone of cloud and data center management. The first file path is the path to your managed file on your minion. How to install and configure salt master and minion. Therefore if a salt minion connects to multiple salt masters due to a fallback or due to multiple active salt masters, the salt minion appears multiple times. Salt open is tested and packaged to run on centos, debian, rhel, ubuntu, windows. I havent found enough resources online to learn salt, but this book was a good way for me to learn many things antal miksa. This allows the minion to salt call to the master but the master cant reach the minion.
How to install saltstack on centosredhat 7 foxutech. Just name the version you want to install salt minion currentamd64setup. After the salt minion is restarted, communication with the salt master would be successfully recovered. I see some talk about it a couple of years ago but can not find if the functionality was ever added. After the saltminion is restarted, communication with the saltmaster would be successfully recovered. For example i have minion with id 172, and i want to rename it, without uninstalling it from the minion machine and the reinstalling with the correct id, lets say 175. Ansible playbook to automate salt minion deployment vinays. Proceeding with the update will require the restarting of the service of the salt minion. This ansible playbook is written to automate the steps provided in my previous blog to setup salt minion in a python3 virtual environment. Otherwise the minion configuration file will need to be edited, edit the configuration option master to point to the dns name or the ip of the salt master. If you have more saltstack agent servers, you need to setup them in the same fashion. Setup salt minion in a python3 virtual environment on a.
The salt cp command can also be used to distribute files presented by the salt file server. The best way to proceed with the updating of salt minion package is mentioned here. In this case, the information passed to the reactor from the beacon event is used to programmatically choose the right salt minion id. Saltstack git as a file server git is basically an open source distributed version control system which is used for keeping the track of modifications made in the file. How to copy a directory from salt minion to master while. The two components of the salt system each have a respective configuration file. Hi, so saltstack question, how can i rename minion id after it got registered on the salt master. In this guide, we will configure salt states for the load balancer that will sit in front of our web servers in our staging and production environments. In order to securely verify the key, need to check the key fingerprint on the new minion server. There are two ways of defining the fileserver environment a. How to copy a directory from salt minion to master while on master. Just name the version you want to install saltminioncurrentamd64setup.
Suse linux enterprise server 11 sp3, sp4 all architectures suse linux enterprise. It can either operate as a standalone daemon which accepts commands locally via salt call or it can connect back to a master and receive commands remotely. The saltminion receives commands from the central saltmaster and replies with the results of said commands. Note that some of the commands should be issued on the master, and some one the minion or slave as noted by the command prompts. Each time a salt minion connects to a salt master, it appears under that salt master in enterprise console. Upgrading saltminion on windows using salt tech notes. The host name wasnt exactly what my ocd wanted when it registered its key with the master, so i needed to change the name of the key.
It will then send its key for the master to accept. Download and install the latest release of saltstack. Similar to the saltminion, accept the saltproxy key as shown below. To alter the saltminions configuration we can either edit the etcsaltminion configuration file which is the default configuration file. This particular package provides the worker agent for salt.
To configure a salt master and minion use commands similar to these. They include network gears with an api running on a proprietary os, devices with cpu and memory limitations or ones that cannot run minions due to security reasons. Say, for instance, each collection of minions for a given data center has its own ntp server it needs to hit, then you might like a way to check that each minions ntp config file is identical without having to run a high state. This allows the minion to saltcall to the master but the master cant reach the minion. Ansible playbook to automate salt minion deployment. The file server is a stateless zeromq server that is built into the salt master. Use salt grains to identify minions uptime through. How to install and configure salt master and minion servers.
Ansible is so beautiful yet cool to complementing salt to be deployed across all hosts. First, you should install the saltmaster package on a server that is reachable by all the hosts that you want to manage and saltminion on the. Otherwise the minion configuration file will need to be edited, edit the configuration option master to point to the dns name or the ip of the salt. Configuring the salt minion the salt system is amazingly simple and easy to configure.
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