Use Cases
Here are the never-ending use cases presented in this section:
Minimal Configuration
The "chef-automate init-config" program creates a Chef Automate configuration file that is annotated and contains the fundamental parameters required to deploy Chef Automate. These options are described in this section, along with instructions on how to modify them on an existing Chef Automate installation.
Chef Automate FQDN
Your fully qualified domain name (FQDN) for Chef Automate is programmable. While there is no maximum length for an FQDN, there is a 25-character limit for top-level domains.
For reference, the components of a URL are as follows:
https://automate.4thcafe.com
<scheme>://<subdomain>.<second-level domain>.<top-level domain>
Create a TOML file with the following partial configuration to alter the FQDN of your Chef Automate installation:
[global.v1]
fqdn = "automate.demo.com"
To deploy your modification, type "chef-automate config patch /path/to/your-file.toml>".
Install Channel
Habitat packages deployed from a release channel make up Chef Automate. Current is the default channel.
Upgrade Strategy
When a Chef Automate installation upgrades are determined by the upgrading strategy. The settings for the upgrade strategy include:
-
When new packages are found in the install channel, "at-once (default)" upgrades the installation.
-
The installation is frozen with its current set of packages when "none" is used.
Installing the most recent packages from the install channel requires switching the upgrade strategy from “none” to “at-once”.
Create a TOML file with the following partial settings to change the upgrading strategy of your Chef Automate installation:
[deployment.v1.svc]
upgrade_strategy = "at-once"
To deploy your modification, run chef-automate config patch /path/to/your-file.toml.
Run the following command to upgrade a Chef Automate setup with upgrade_strategy set to none:
chef-automate upgrade run
Using your install channel, this command will update Chef Automate to the most recent version.
Deployment Type
Changes to deployment type should not be made because only local deployments are accepted.
Settings
You are unable to alter the admin username, name, or password during the first deployment.
Use the Chef Automate UI to alter the admin password after deployment. Navigate to the Users page on the Settings tab after signing in as the admin user. To view the administrator's User Details page, select "Local Administrator." Go to the Reset Password tab by navigating. Enter your old password, followed by a confirmation of your new one, on the interface. For your changes to be saved, use the Reset Password option.
Fetch the admin user record, copy the User ID, and use the following command-line syntax to modify the admin password:
export TOKEN=`chef-automate iam token create admin-token-1 --admin`
curl -X PUT -H "api-token: $TOKEN" -H "Content-Type: application/json" -d '{"name":"Local Administrator", "id": "<admin user ID>", "password":"<password>"}' https://automate.example.com/api/v0/auth/users/admin?pretty
Load Balancer Certificate and Private Key
Make a TOML file with the following partial settings to replace your Chef Automate installation's load balancer certificate and private key:
[[global.v1.frontend_tls]]
cert = """---BEGIN CERTIFICATE---
<your_certificate>
---END CERTIFICATE--
"""
# The TLS RSA key for the load balancer frontend.
key = """-----BEGIN RSA PRIVATE KEY-----
<your private key>
-----END RSA PRIVATE KEY-----
"""
To deploy your modification, type "chef-automate config patch /path/to/your-file.toml>".
License Key
With the chef-automate license application command, you can apply for your Chef Automate license in one of two ways:
- chef-automate license apply </path/to/license-file.jwt>
-
chef-automate license apply <content-of-license>
You cannot submit a licensing application by patching the configuration file after your initial deployment.
Proxy Settings
By configuring environment variables or configuration parameters, you can tell Chef Automate to use a proxy.
Without a configuration file, the command "chef-automate deploy" will respect the proxy environment variables:
- HTTPS_PROXY/https_proxy
- HTTP_PROXY/http_proxy
-
NO_PROXY/no_proxy
These environment variables are added to the configuration that Chef Automate generates when they are set prior to the first deployment.
Any proxy settings must be specified in the configuration file you supply during deployment (chef-automate deploy /path/to/config.toml).
General OpenSearch Configuration
Create a TOML file that provides the rudimentary configuration listed below to configure OpenSearch for your Chef Automate installation. To deploy your modification, execute "chef-automate config patch /path/to/your-file.toml>" after uncommenting and making any necessary changes to the settings.
Setting OpenSearch Heap
In most circumstances, the OpenSearch heap size should be set to 50% of the system memory. However, you should take into account the important cautions listed in the documentation for OpenSearch heap size.
To alter the OpenSearch heap size, for instance, on a system with 64GB of memory, one would first need to generate a TOML file containing the partial configuration shown below, and then execute chef-automate config patch /path/to/your-file.toml> to deploy the change.
[opensearch.v1.sys.runtime]
heapsize = "32g"
Create a TOML file that contains the bare minimum setup for PostgreSQL in your Chef Automate installation. With the following restrictions, uncomment and modify settings as necessary.
Load Balancer
Only the Chef Automate-deployed PostgreSQL database is impacted by these configuration adjustments. A PostgreSQL database that is installed externally is unaffected by them.
To connect to its PostgreSQL database, Chef Automate uses TLS mutual authentication.
Troubleshooting
Configuration files may have problems due to common syntax errors:
-
Keys: Instead of dashes, names use underscores.
-
Ports: Pick the appropriate type. Since single digits are integers, there is no need for quotation marks. Ranges need quote marks because they are strings.
-
Whitespace: Whitespaces include tabs and blank spaces.
- Arrays: Comma-separated entries of the same kind should be enclosed in square brackets.
Frequently Asked Questions ⁉️
What does a DevOps Chef do?
Chef is an open-source cloud deployment and configuration management tool. Anyone can use it to organize servers, whether they are in a departmental data center or the cloud.
Why is Chef crucial to DevOps?
Chef treats infrastructure like code, which aids in finding a solution. The machine setup is explained in a Chef's recipe rather than having to be changed manually.
In DevOps, what do Chef and Puppet do?
The DevOps pioneers Chef and Puppet both provide well-liked enterprise-grade configuration automation tools.
What is a command line interface?
A command-line interface(CLI) is a text-based user interface (UI) used to get commands from the user in the form of texts.
In which language is Chef written?
Chef is written in ruby and erlang programming language.
Conclusion
This article discussed the Configuration Overview in Chef. Configuration Overview includes use cases of multiple commands and installations.
We hope this blog on Chef - Configuration Overview was helpful.
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