Vault High Availability with Consul
Identity: Entities and Groups
Generate Root Tokens Using Unseal Keys
Protecting Vault with Resource Quotas
Codify Management of Vault Using Terraform
Codify Management of Vault Enterprise Using Terraform
Troubleshooting Vault on Kubernetes
There are one-of-a-kind approaches to configure a Vault server relying on the server surroundings and your meant use case. You can think of Vault server configuration as belonging to any such 3 categories, relying on how and where they may be used:
This subject matter dives a piece deeper these configuration sorts, and shares a few precise examples, which rookies to Vault configuration must discover beneficial.
If you'd want to study greater about configuring Vault, you’re inside the right area.
»Command Line Flags
If you have been gaining knowledge of approximately Vault through the choices Getting Started series and began a Vault dev server or you’ve got previous Vault experience, then you might be acquainted with one command line flag: -dev.
You can usually start a dev server by means of passing the choices -dev flag to the vault server command line as proven inside the following example command for Linux.
The same command for Windows PowerShell resembles this case.
CAUTION: When the usage of a dev mode server, and additionally passing in configuration via environment variables or a record, you could encounter an error circumstance if you attempt to configure a TCP listener that overlaps with the choices default dev mode listener.
»What approximately other flags?
While there are alternatives best a small range of flags, they commonly outline crucial configuration while used. This section info a number of the maximum usually used flags.
The most commonplace command line flag you will stumble upon is the -config flag.
You can use this flag 3 exclusive methods to specify the whole route on your Vault configuration file or files.
Here is a Linux instance that names one configuration report, /and many others/vault/vault-server.hcl. This file contains all the real Vault server configuration.
Suppose that your Vault configuration includes modular configuration files, and you’ve got a listing, /and so forth/vault that incorporates just those 3 files:
You should start your Vault server in special methods for this scenario. Either by means of explicitly naming all of the files like this example.
or if all the .hcl documents in the directory are supposed for use handiest for Vault configuration, you can pass in simplest the choices directory name with the aid of itself as an alternative, as in this example.
Either manner, in the case of the choices previous two examples, Vault will compose the man or woman configuration files into one configuration at runtime.
Another popular flag is -log-level, which lets in you to specify a log stage from one of this sort of degrees, indexed from maximum to least verbose: “trace”, “debug”, “info”, “warn”, or “err”.
Vault will log at the choices “data” degree by using default, but in case you are doing troubleshooting or in any other case need a few additional log detail, you may start Vault with a command line like this to growth the log level to “hint”.
Consult the choices command options documentation for the entire list of flags.
Vault can be configured with one or more HashiCorp Configuration Language (HCL) documents.
You can think of a Vault configuration report as having two scopes, a global scope for standard configuration, and per-object configuration for sections of the configuration defined with the aid of HCL items, recognised in Vault configuration files as a stanzas.
The following diagram illustrates this with an example Vault configuration record, vault-server.hcl:.
In the Vault documentation, worldwide configuration options appear on the configuration evaluate web page, and options for configuration items like listener, garage, and telemetry are located of their respective pages.
From the previous command line flags instance, you found out the way to pass a configuration record call to the choices Vault server at runtime.
Here is the choices entire example configuration document.
This is a easy and portable configuration example in an effort to paintings as-is in the majority of environments for studying functions which require persisting records among restarts of the vault procedure.
NOTE: The above example disables TLS (tls_disable = “real”) for checking out and studying. However, Vault ought to always be used with TLS in production to provide stable verbal exchange between customers and the Vault server. It calls for a certificate record and key document on every host where Vault is jogging.
Here is a line-with the aid of-line description of each choice in the report:
On a Linux or macOS device, you may write the choices report out as vault-server.hcl to the existing running listing with this command.
Then, you could begin Vault with the choices configuration file and “err” stage logging for the absolute minimum viable output for instance. This configuration will most effective output errors as part of the Vault operational logging.
The entirety of expected output from beginning Vault with this configuration and log level will resemble this case.
Now that you have learned greater approximately command line flags and configuration files, let's take a look at the surroundings variables you may use to configure Vault servers.
Environment variables are a fairly specialised form of configuration useful for positive circumstances as defined in this section.
Here are some of the most commonly used environment variables related to configuring a Vault server.
The VAULT_API_ADDR environment variable is used to specify the deal with (as a full URL plus port) to promote it to different Vault servers in the cluster for client redirection purposes. As such it is pointless when beginning a unmarried Vault server, but you will come across a caution if it isn’t always configured in a configuration record or with the surroundings variable.
In the subsequent example server startup output, a warning is emitted: “no api_addr value specified in config or in VAULT_API_ADDR”. Vault will attempt to stumble on the best cost to use, but in case you can not edit the choices server configuration document, you could still set it by way of exporting a right VAULT_API_ADDR surroundings variable fee.
Specify the value as a URL with port (TCP/8200 by way of default) as proven on this simple instance:
or you can additionally specify the environment variable within a systemd unit:
The VAULT_CLUSTER_ADDR surroundings variable is used to specify the address (as a full URL plus port) to put it up for sale to other Vault servers in the cluster for request forwarding functions in the same manner that the cluster_addr configuration file alternative does.
Specify the price as a URL with port (TCP/8201 through default) as proven on this simple instance:
or you could also specify the surroundings variable inside a systemd unit:
Vault helps the choices HTTP_PROXY environment variable and if this environment variable is set within the vault process person surroundings prior to starting the choices vault system, then Vault will proxy its HTTP requests via the required deal with.
Specify the choices fee as a URL as shown on this simple instance:
or you can also specify the choices environment variable within a systemd unit:
Vault helps the HTTPS_PROXY environment variable and if this surroundings variable is ready inside the vault procedure person environment previous to starting the choices vault technique, then Vault will proxy its HTTPS requests thru the specified deal with.
Specify the fee as a URL as shown on this simple instance:
or you could additionally specify the environment variable inside a systemd unit:
Vault helps the choices NO_PROXY environment variable and if this environment variable is set in the vault method user environment previous to starting the vault manner, then Vault will no longer use a proxy for the desired address values.
Specify the choices fee as an IP cope with prefix (1.2.three.four), an IP cope with prefix in CIDR notation (1.2.three.four/eight), a site call, or a special DNS label (*). An IP deal with prefix and domain name also can encompass a literal port wide variety (184.108.40.206:eighty).
or you can additionally specify the surroundings variable inside a systemd unit:
You have found out extra approximately Vault server configuration options and the choices specific ways to configure a Vault server.
Check out the choices resource links for greater configuration associated documentation, or hold on to Your First Secret as the next step in getting started with Vault.