Learn to use Bolt to execute commands on remote systems, distribute and execute scripts, and run Puppet tasks or task plans on remote systems that don’t have Puppet installed. The command is only executed if the Guest account does not exist, as indicated by unless returning 0. Puppet uses the same exec resource type on both *nix and Windows systems, and there are a few Windows-specific best practices and tips to keep in mind. The command can be a simple string, which is executed as-is, or an Array, which is treated as a set of command arguments to pass through. That is, unless you can use purging with them. Your best bet is to run the action as a script and set up the PATH inside the actual script. 1 Unless issue with Puppet. You are missing my points: (1) you need to establish what grep's exit status actually is when Puppet runs it. When using Puppet APIs to load file content and metadata, you can access files in the scripts/ directory of a module using the scripts file mount. 3. supported Adds a new exec provider for executing PowerShell commands. Puppet’s behavior when declaring or assigning a class with both styles is undefined, and will sometimes work and sometimes cause compilation failures. Setting the umask only has effect within the process that does it (see umask in sys/stat. The documentation for Exec's onlyif tag says this: onlyif The exec has an onlyif, unless, or creates attribute, which prevents Puppet from running the command unless some condition is met. We explore practical examples and best practices for handling procedural requirements when we look at the exec resource type in Chapter 5. The synchronization of an out-of-sync Exec resource involves only running the command given by its 'command' property, so that's the only part that --noop prevents. Puppet Exec resource to apply only when a File changes. Puppet Exec Resource. My question is: I want to check if a file exists in the /tmp folder, and delete it before it starts downloading again. Note: PowerShell variables (such as $_) must be escaped in Puppet manifests either using backslashes or single quotes. The exec has an onlyif, unless, or creates attribute, which prevents Puppet from running the command unless some condition is met. See the Puppet Type Reference for the exec resource and look for unless and onlyif. Commenting out or outright deleting the class declaration, as you have done, is the simplest and most universal method for ensuring that the class is not applied. 1 Answer. d directory, then puppet agents pull it down and execute it on every run and provide the fact. local service ntpd start How can I make Puppet run this command once on all servers? I want to Puppet's if statement allows you to change the manifest behavior based on the value of a variable or an expression. This is where refreshonly backfires rather terribly. The Puppet “exec” resource allows users to run commands and scripts on nodes. Running Powershell in Puppet. Q&A for work. This means a resource with noop => false will be changed if necessary, even when. So having Puppet do it automatically will help with that. An example in Puppet 2. onlyif => "/sbin/swapon -s | /bin/grep file > /dev/null" - This step works only if there is no swap in place, but if the swap file is already created, then the step fails. The only plausible source of such an issue in the code you presented is your Exec's unless command: unless => "`ps -eaf | grep service | grep -v grep | wc -l` -eq 3" When the command there is executed by the shell, it first executes unless: A shell command that is run as a test to determine if the command should not run. ¯_ (ツ)_/¯. {"payload":{"allShortcutsEnabled":false,"fileTree":{"lib/puppet/type":{"items":[{"name":"file","path":"lib/puppet/type/file","contentType":"directory"},{"name. If. cmd', provider => windows, subscribe => File ['folder_a'], logoutput => true, refreshonly => true, # Add this line. If it is possible to ensure the file to be a directory then that, too, probably would not play nicely with the effect of the Exec. Puppet uses the same exec resource type on both *nix and Windows systems, and there are a few Windows-specific best practices and tips to keep in mind. The baseline measures how long Puppet takes to just start up, so it’s not even executing powershell then. Using virtual box and a vagrant bas. The db has already been created in the vm, and if it's already been cloned, the count returned from the query gives me something other than a ' 0 ', and the grep because. This page provides a reference guide for Puppet 's built-in types: package, file, service , notify, exec, user, and group. Case statements will execute a maximum of one code block. ##Limitations. But it is certainly worth verifying the type and value of your variable. Following code updating file /etc/sysctl. So in. Puppet File resource runs despite Exec unless. Long answer The scheme you have in mind is not compatible with Puppet's master/agent paradigm. For example, to view the free disk space of a host, run: With. jar', } Should this be part of the manifest which could look like this?Each value in the Puppet language has a data type, like “string. Backslashes MUST be used in:. But it when I try it, it is. 1 run Exec only if another Exec ran. To ensure the resource is idempotent, specify one of the creates, onlyif, or unless attributes. log. Control expressions unless => 'ls /somefile' ls will return with a non-zero return code if the file does not exist and unless will only let the exec it is under execute if its test returns a non-zero return code. 0 and above would look like this: exec { "apt-update": command => "/usr/bin/apt-get update" } Exec["apt-update"] -> Package <| |> Every time a package command is executed, the dependency (in our case 'apt-update') will be triggered fist. Using onlyif allows you to use the return value of one or more commands as your. The exec has an onlyif, unless, or creates attribute, which prevents Puppet from running the command unless some condition is met. 5. Note: These two behaviors should not be mixed for a given class. Description. Let’s take a look there: ls -la /etc/puppet. |>). asked Apr 1, 2022 at 20:47. The logic looks a little confusing but basically, the way I understand unless is that if the command returns a 0, then the whole exec wont be run. Puppet - Check if package is installed, but do not require it. Do you have reason to think that there's something wrong. 0. I am trying to use code like this: exec { 'example':. The ensure (see ensurable. 0 to 5. And as for the title of this question which I originally overlooked. You may need to reboot the system after enabling if SELinux was. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The pgrep manual page tells us that the exit code for pgrep will be zero (0) only when matching processes are found and it'll return one (1) when there are no matching processes. Puppet Exec resource to apply only when a File changes. The difference between platform engineering and DevOps is pretty nuanced. The ordering arrow is a hyphen and a greater-than sign ( -> ). exec { 'Make sure frob is installed': command => 'apt-get install -y frob', unless => 'frob --version', } Ansible's command module has a "creates" option that looks for a file, but I don't. cmd', provider => windows, subscribe => File ['folder_a'], logoutput => true, refreshonly => true, # Add this line. Puppeteer Script Works Local But Not On EC2 AWS. Puppet: exec onlyif value is not equal. Manage local groups . Code so far (which is not working) is: Hiera snippet:By default, Puppet agent runs as the Administrator account, which has this privilege. Onlyif and unless are somewhat similar as they serve as conditional operators in Puppet which means the command runs based on the output of what is in these parameters. This release documents the noop behavior of the onlyif and unless parameters of the exec resource. The onlyif and unless. The commands in an Exec resource either have to be fully qualified (i. Exec ['get-chocolatey'] -> Package<| provider == 'chocolatey' |>. I am using vagrant with puppet to set up virtual machines for development environments. The exec has an onlyif, unless, or creates attribute, which prevents Puppet from running the command unless some condition is met. or use the 'resolvconf --disable-updates' exec resource's 'unless' parameter to test for a running unbound daemon prior to installing the package. Adds a new exec provider for executing PowerShell commands. unless: A shell command that is run as a test to determine if the command should not run. It is a limitation of the underlying system. When something isn't builtin to file, I generally just to turn to an puppet exec declaration. As best I can tell by reading the source code the "holdable" feature is fundamentally flawed. Puppet exec unless doesn't appear to work how I expect. Publish a module; Topics. You can use Puppet variables in an EPP template to customize its output. Modules that are supported by Puppet, Inc. (capital X) permission when using recursion so files can retain the execute permission if they have them, but also allow you to traverse the directory as that requires the execute. Expressions can be compounded with other expressions, and the entire combined expression resolves to a single value. In this case specifying a directory is done by setting ensure to (unsurprisingly) directory. 6. The CentOS/Puppet installation process should already have created a directory called /etc/puppet (If it hasn’t, create it with mkdir /etc/puppet ). By using find to execute whatever commands you mean by "manage files" you should be able to accomplish your goal. Puppet's if statement allows you to change the manifest behavior based on the value of a variable or an expression. This is a textbook case where you should write the test first, and the code after. 0. An exec resource, which starts a powershell script, which starts a PowerShell process, which starts a CMD process, which runs a batch file (with an invalid path), which runs another batch file, which processes some kind of response file. The one thing the exec doesn't need to do is put the service in a started state. The shortest path to creating better Puppet modules. 6. password is not getting changed to the default password and also chage. If none of the cases match, Puppet will do nothing and move on. exe startup arguments, so local scope will always return Bypass, thus causing it to fail on the unless every time. Puppet Exec with no command attribute. Since I don't have Puppet 4. Puppet Exec resource to apply only when a File changes. However, I strongly recommend that you do not use any kind of non-conditional exec with puppet. Here's an example: @user { 'foo': groups => ['somegroup'], membership => minimum, } Then realize that virtual user with then collection syntax: User <| title == foo |>. How to clean up files created by Exec resources? 0. 1. That's what the ticket is about. /usr/bin/test instead of test) or the path attribute of that Exec resource has to be set. I am new to Puppet, and I am trying to install a file if a package is installed. Puppet Exec tag onlyif troubles. Like, from scratch. It would be better to explicitly "exit 0" whenever you do not "exit 1". The statement itself is simple but the class doesn't contain any built-in conditional checks (similar to "unless =>" in exec class). If you are using Puppet 3. Running Powershell command directly using Puppet exec resource. 🔩 Tip: Unless your module also includes tests for manifest code, add the BoltSpec helpers and configure Puppet and Bolt in spec_helper. 1. Visit Stack ExchangeYes, you'd put a script into your modules path under a facts. This module adds a powershell and pwsh provider to the exec type, which enables exec parameters, listed below. This statement will execute the sql statement drop table application_users on the database named db in the instance named instance. To use sudo non-interactively, the invoking user needs a NOPASSWD: entry in sudoers %wheel ALL=(fred) NOPASSWD: /usr/bin/echo "hola dan" Then. , are rigorously tested, will be maintained for the same lifecycle as Puppet Enterprise, and are compatible with multiple platforms. – Note that Puppet issue 8083 should not affect you in the case that the Application-Server feature is installed, but it is unclear (to a non-initiate in Powershell) what the exit code of that 'unless' command will be in the alternative case. The command specified causes the exec to be triggered unless the command specified returns a success (zero) exit status. You can use onlyif, unless, creates and refreshonly to manage the case when you want the command to execute. pp file. Exec ['get-chocolatey'] -> Package<| provider == 'chocolatey' |>. As far as I know, the basic file type in Puppet only handles discretionary permissions that only allow for one group and one owner. Learn more about TeamsIt's just not something you can do with vcsrepo unless you can override path (you can in exec). Or even better, split the shells parts into separate exec resources with dependencies and unless parameters. Without one of these conditions, the exec will run on every run of the puppet file which is generally undesirable. Follow#####unless Runs the exec, unless the command returns 0. Puppet: Conditional exec using unless-option. Autorequires: If Puppet is managing an exec’s cwd or the executable file used in an exec’s command, the exec resource will autorequire those files. This module is particularly helpful if you need to run PowerShell commands but don't know how PowerShell is executed, because you can run PowerShell commands. I'm experiencing a very strange behavior with Puppet's Exec type. Share Puppet can execute binaries (exe, com, bat, etc. I have a requirement where one exec notifies another exec which notifies a defined resource type (which sets some variables and runs an internal exec). Since I don't have Puppet 4. The code that creates the container is executed unless the following test if the container exists succeeds: lxc-info -n $ {lxcname} >/dev/null. Valid options: String. We will focus on the language terminology, syntax and. My understanding is that if the second exec fails, the defined resource type should NOT be refreshed. The 'onlyif' and 'unless' commands of an Exec are used in the process of determining whether the Exec is already in sync, therefore they must be run during a --noop Puppet run. exe only when the aspnet_banking_app is created or changed. in. Topics. Contribute to tarunmunjal/puppetlabs-powershell development by creating an account on GitHub. Puppet strange behaviour of execs. First, change the require arrow to a notify arrow, from -> to ~>. onlyif and unless in --noop documented. Puppet File resource runs despite Exec unless. Chaining arrows. escape. (2) it is unclear from your description whether the Exec's command is actually run (vs. 2. h ), and the sub-processes it spawns. I will show how these work in the example below. "exec / onlyif" and "exec / unless" are kind of measures-of-last-resort in the Puppet world (now, having said that, I must admit that I'm completely guilty of using it myself on occasion :p ). This says "get-chocolatey" should happen before any package resource with a Chocolatey provider. The simplest solution is to use the shell provisioner to install Puppet modules via module install after the Puppet installation (unless you are using a Vagrant box with Puppet baked in,. Puppet exec unless doesn't appear to work how I expect. 1. After changing topology strategy, cassandra should rebuild keyspace - this is where puppet comes. I am currently learning puppet, and I am attempting to have an exec that will notify another exec but only if the first exec is succsfull. To ensure the resource is idempotent, specify one of the creates, onlyif, or unless attributes. Resource default for the exec type A resource default statement set default attribute values for a given resource type. When you use any of the four so-called metaparameters for relationships in Puppet - those being: require , before , subscribe & notify - you tell Puppet that you want the application. I have Puppet master 3. exec { 'update hostname': command => 'hostname VM01', path => '/usr/bin:/usr/sbin/:/bin:/sbin', unless => '[ "$(hostname)" == "VM01" ]', } You need to. Selector statement. There is a module in puppet already installed by default called:puppetlabs-stdlib and within this module a defined type called file_line which does the trick :) Here is my case scenario under the. e. Hiera supports booleans, and always has done so -- or at least, it is so documented. He just built and performed the lead puppet for a Toronto television pilot. 0, to 5. I would like to add a number of control gates into my manifest via onlyif and unless. Puppet seems to be behaving exactly as I would expect, with the only potentially surprising thing being that even the 'posix' provider runs the 'unless' and 'onlyif' commands via the shell. 12, but from 5. This module adds a powershell and pwsh provider to the exec type, which enables exec parameters, listed below. Machines receiving task requests must have SSH or. 3. exec { 'chage': path => '/usr/bin/', command => 'chage -d 0 askar', subscribe => File ['askar'], refreshonly => true, } } I then verified that after applying the refreshonly parameter , the. On Windows, most exit codes are integers between 0 and 2147483647. The exec has an onlyif, unless, or creates attribute, which prevents Puppet from running the command unless some condition is met. This example specifies defaults for the exec resource type attributes path , environment , logoutput , and timeout . 2 but are only using architecture-appropriate. 1. 4 Answers Sorted by: 24 Have you tried this? onlyif => "test ! -f /usr/local/bin/papply" Not sure if Puppet can use the '!' character Perhaps a better. where read = 4, write = 2, and execute/search = 1. Thus:I only want to execute that if the hostname is not what it should be: exec { 'update hostname': command => 'sudo hostname VM01', unless =>. To ensure the resource is idempotent, specify one of the creates, onlyif, or unless attributes. We need to set setfacl -R -m u:foreman:rwx /etc/dhcp /var/lib/dhcpd via our puppet installer instead of modifying standard UNIX owner and permissions. 0 or later must be installed on the machine from which you are running task commands. The Puppet Design Philosophy Before we begin to explore best practices with Puppet, it’s valuable to understand the reasoning behind these recommendations. Our choice at the beginning of the project was to not start with it, for these reasons : It was important for the team to learn shell first, even if the lifetime of the scripts had to be short. Menu Log In List your. exe startup arguments, so local scope will always return Bypass, thus causing it to fail on the unless every time. Puppet does not know about the files which are been modified by the shell script. I am trying to use code like this: exec { 'example': path => 'C:\Windows\System32', command => 'something', unless => 'reg query "HKEY_LOCAL_MACHINE\Software\My key" /f 5. You can also set variables within the manifest, which can change the. 1. I am trying to run a Powershell command directly using Puppet exec resource instead of specifying path to the Powershell script. The Puppet exec resource has OnlyIf and Unless attributes which can be used to limit when the command is invoked; e. 1. Onlyif and unless are somewhat similar as they serve as conditional operators in Puppet which means the command runs based on the output of what is in these parameters. They take a Boolean condition and an arbitrary block of Puppet code, evaluate the condition, and if it is false, execute. puppet exec returned 1 instead of [0] 1. Search. If you remove the parameter it will also fail if the regular execution policy is set to Restricted. The risk of course is that Puppet runs more than once in that hour, e. When using cmd. Since Puppet uses the same exec resource type on both *nix and Windows systems, there are a few Windows-specific caveats to keep in mind. See provider/exec. Currently, he experiments. Puppet can run binary files (such as exe, com, or bat), and can log the child process output and exit status. The Puppet “exec” resource allows users to run commands and scripts on nodes. Puppet File resource runs despite Exec unless. How do I make make puppet module break if condition not met. 26th - 28th Surrey Sparks Stages - Puppet-making workshops Surrey BC. txt ]; then echo "my_fileexists=yes" else echo "my_filexists=no" fi. Try checking the puppet master log at /var/log/puppetmaster. This module is particularly helpful if you need to run PowerShell commands but don't know how PowerShell is executed, because you can run PowerShell commands. Yet when I run puppet agent -td I see that the puppet agent IS executing pkill -SIGQUIT mysqld; sleep 5; systemctl restart mysqld. onlyif and unless in --noop documented. Sort by Year. This style guide applies to Puppet 4 and later. Windows puppet exec command file path. 1 Answer. 4. Tasks use Scripts to execute them on remote machines. Puppet: Conditional exec using unless-option. The third example is a (semi-)common mistake made by people coming from certain other tools. 0. It is a limitation of the underlying system. If the file does not exist then the Exec succeeds without running /bin/true. "Unless" statements work like reversed if statements. Your exec will run only if pgrep returns 0. 163k 8 82 159. 0. To use commands with pipe |, you must use the shell builtins work around with cmd. Alternaitve 2: Use Augeas: seems overkill for a simple search & replace. Puppet for Windows and Powershell Recipes. Hot Network QuestionsPuppet avoids destroying directories unless the force attribute is set to true. 2 Handling names with spaces. The way I check this is if the gopher user has the default uid of 13. 0. problem, then do check at least these things: 1) that your 'unless' command is exiting with the expected return. The onlyif parameter is defined as. exe -executionpolicy remotesigned -file C:\test. Is there a way to tell puppet to only execute command if one of the files does not exist? 0. Is there a way to tell puppet to only execute command if one of the files does not exist? 0. How can I tell Puppet to stop a service on shutdown without keeping it running? 0. rb file or in the individual test files, and configure Puppet and Bolt for the testing environment. . Puppet provides a built-in exec type that is capable of executing commands. #####unless Runs the exec, unless the command returns 0. Puppet lookup uses a hierarchy of data sources, and a given key might have values in multiple sources. Execute installers from shared (samba) folder instead of copy it first to agent system does not solve the issue. ” There is also a set of values whose data type is “data type. By setting the hiera value selinux::mode: 'enforcing', that will ensure SELinux is enabled (it will default to targeted mode on CentOS). As a suggestion:I am using Puppet installed with the powershell module. Unix: exec { 'delete_files': command => "/bin/find [your find command arguments here] -delete", } Some find commands don't have -delete, so. [Unit] Description=My Webapp Java REST Service [Service] User=ubuntu # The configuration file application. It will execute the block of code associated with the first matching case, and ignore the remainder of the statement. you can check this quickly with the telnet command. Expressions are statements that resolve to values. Explanation Sometimes a simple creates isn't enough to determine if an exec should run or not. 5. if exec joins the domain, it should have an unless condition that tests whether or not the machine is part of the domain. exec power shell script having corrective action every time. Puppet avoids destroying directories unless the force attribute is set to true. This release documents the noop behavior of the onlyif and unless parameters of the exec resource. 1. exec { 'chage': path => '/usr/bin/', command => 'chage -d 0 askar', subscribe => File ['askar'], refreshonly => true, } } I then verified that after applying the refreshonly parameter , the. lst contents. This can be used with bash on Linux, but with the PowerShell provider , it can run PowerShell on Windows and Linux nodes as well. exe /g | findstr /C:"$ {timezone}"", } Well, I ended up not needing to do this as I found a config file I could just manage as a template. As an example I have a powershell script that opens notepad:. at deployment time, but figured it would be best to have Puppet manage it. Thanks!. how do I tell 'puppet apply' that the package is already installed) But you really need something like an onlyif or unless or this is going to execute every 30 minutes and that breaks the idempotent rule we try and apply with Puppet code where things only change if they need correcting. sudo -u fred /usr/bin/echo "hola dan" Note that I used sudo -u in favor of sudo su -. In your case, the Exec is always successfully applied. com I am trying to create Puppet exec that would only execute if certain Windows registry value does not exist. The onlyif and unless commands of an exec are used in the process of determining whether the exec is already in sync, therefore they must be run during a noop Puppet run. 0 how to ensure puppet exec run on every event triggered? 0 Puppet: How to execute a Exec resource if another Exec resource failed. You can also set variables within the manifest, which can change the. 1. Yet when I run puppet agent -td I see that the puppet agent IS executing pkill -SIGQUIT mysqld; sleep 5; systemctl restart mysqld. Glossary. The Puppet “exec” resource allows users to run commands and scripts on nodes. In the modified question, the resources involved have such a relationship already. e. Puppet has two main ways to declare classes: include-like and resource-like. The logoutput parameter just logs the output to the. This module is particularly helpful if you need to run PowerShell commands but don't know how PowerShell is executed, because you can run PowerShell commands. Discover. 1. fail when a file exist in puppet. Note that the example uses the unless parameter to make the resource idempotent. 4. 5. 1 on CentOS, and Puppet clients 3. run this on your node -. supported. powershell conditional IsNullorEmpty not working as planned. This means you. The exec resource from Puppet, the automation framework, is a mysterious beast. wow! My recommendation is: throw it away and start over. a sysadmin might manually run it. I will show how these work in the example below. 0. Since Puppet 2. With Bolt on the command line, run bolt task run exec command=<COMMAND>. Alternatively, if that is valid, call the prior script through the latter's onlyif or unless parameter, instead of as its own exec resource. }Puppet: Conditional exec using unless-option. Among them, notice (), info (), and debug () seem the. In your case, it sounds like you want the exec to run only when your file changes. Please qualify the command or specify a path. This runs the first-exec, and unless /var/exists it runs the second-exec. If executed as root, the lxc-info checks for the name among the root containers. It will also restart itself if exec['Do Stuf'] runs because of the way the relationship is defined. exec { ‘SETHELLO’: command => ‘Add-Content -Path c: est. Load 7 more related questions Show fewer. TJL. Install Puppet Agent on bulk windows server. Teams. 0powershell. It will package up all of its DSC resources and then wrap the Puppet Resource API around it so you can invoke it just like any other module. . So, in order to avoid this I am adding the refreshonly parameter as follows. As for a "more intelligent way of excluding", I think you need to couch the question differently. 0 through 3. Modules that are supported by Puppet, Inc. Here is my code (Puppet): exec { 'Download mediawiki to temp': cwd. '". Learn more See the exec documentation for the command, unless, and onlyif. = (assignment) Expand. I want to check if the file exists in the client. Modules that are supported by Puppet, Inc. exe utility (note the space after and lack thereof before the = character): exec { "install_service" : command => "$ {Sys32}sc. The Puppet “exec” resource allows users to run commands and scripts on nodes. Resource default for the exec type A resource default statement set default attribute values for a given resource type. {"payload":{"allShortcutsEnabled":false,"fileTree":{"manifests":{"items":[{"name":"fcontext","path":"manifests/fcontext","contentType":"directory"},{"name":"boolean. Adds a new exec provider for executing PowerShell commands. Adding a / to the end of a file name isn't enough to tell puppet to. You could use for instance (see reference doc)An exec will always run unless it has something to limit it. bundle exec rake dir_server:run [config/dea. I have a script that really only needs to be run one time on a server, i. supported Adds a new exec provider for executing PowerShell commands. } @choover Unfortunately that won't work. Installing servers with Puppet is a real plus compared to shell (yeah captain Obvious!). Because the Exec requires the File to (conditionally) be applied first, its own unless parameter would not be evaluated in time to affect that, even if there were a way it could do. TJL. In this blog post, we'll make it simple with definitions and examples to explain the basics of platform engineering vs. There's a generalizable form of this dependency that might be helpful in reducing the repetition of the require statement. The exit status when you run it directly and the exit status you expect it to return are irrelevant. execute update-grub, which would look for avaliable kernels and would add related configs to the menu. 2 or later for the pip3 provider, what is an alternative approach to installing Python packages by hand via the 'pip3' command? If I use the 'exec' approach, how do I control the package from being reinstalled all the time? (i. Background: I am upgrading our lxc puppet module to support the emerging unprivileged LXC technology. ##Development. pp in the Puppet command prompt. Is there a way to tell puppet to only execute command if one of the files does not exist? 1. notify is set on the user, and refreshonly is set on the exec. It will package up all of its DSC resources and then wrap the Puppet Resource API around it so you can invoke it just like any other module. There are three main ways for an exec to be idempotent:Conversations.