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Command: job validate

Alias: nomad validate

The job validate command is used to check an HCL job specification for any syntax errors or validation problems.

Usage

nomad job validate <file>

The job validate command requires a single argument, specifying the path to a file containing an HCL job specification. This file will be read and the job checked for any problems. If the supplied path is "-", the job file is read from STDIN. Otherwise it is read from the file at the supplied path or downloaded and read from URL specified. Nomad downloads the job file using go-getter and supports go-getter syntax.

On successful validation, exit code 0 will be returned, otherwise an exit code of 1 indicates an error.

The run command will set the vault_token of the job based on the following precedence, going from highest to lowest: the -vault-token flag, the $VAULT_TOKEN environment variable and finally the value in the job file.

When ACLs are enabled, this command requires a token with the read-job capability for the job's namespace.

General Options

  • -address=<addr>: The address of the Nomad server. Overrides the NOMAD_ADDR environment variable if set. Defaults to http://127.0.0.1:4646.

  • -region=<region>: The region of the Nomad server to forward commands to. Overrides the NOMAD_REGION environment variable if set. Defaults to the Agent's local region.

  • -namespace=<namespace>: The target namespace for queries and actions bound to a namespace. Overrides the NOMAD_NAMESPACE environment variable if set. If set to '*', job and alloc subcommands query all namespaces authorized to user. Defaults to the "default" namespace.

  • -no-color: Disables colored command output. Alternatively, NOMAD_CLI_NO_COLOR may be set. This option takes precedence over -force-color.

  • -force-color: Forces colored command output. This can be used in cases where the usual terminal detection fails. Alternatively, NOMAD_CLI_FORCE_COLOR may be set. This option has no effect if -no-color is also used.

  • -ca-cert=<path>: Path to a PEM encoded CA cert file to use to verify the Nomad server SSL certificate. Overrides the NOMAD_CACERT environment variable if set.

  • -ca-path=<path>: Path to a directory of PEM encoded CA cert files to verify the Nomad server SSL certificate. If both -ca-cert and -ca-path are specified, -ca-cert is used. Overrides the NOMAD_CAPATH environment variable if set.

  • -client-cert=<path>: Path to a PEM encoded client certificate for TLS authentication to the Nomad server. Must also specify -client-key. Overrides the NOMAD_CLIENT_CERT environment variable if set.

  • -client-key=<path>: Path to an unencrypted PEM encoded private key matching the client certificate from -client-cert. Overrides the NOMAD_CLIENT_KEY environment variable if set.

  • -tls-server-name=<value>: The server name to use as the SNI host when connecting via TLS. Overrides the NOMAD_TLS_SERVER_NAME environment variable if set.

  • -tls-skip-verify: Do not verify TLS certificate. This is highly not recommended. Verification will also be skipped if NOMAD_SKIP_VERIFY is set.

  • -token: The SecretID of an ACL token to use to authenticate API requests with. Overrides the NOMAD_TOKEN environment variable if set.

Validate Options

  • -json: Parses the job file as JSON. If the outer object has a Job field, such as from "nomad job inspect" or "nomad run -output", the value of the field is used as the job.

  • -hcl1: If set, HCL1 parser is used for parsing the job spec. Takes precedence over -hcl2-strict.

  • -hcl2-strict: Whether an error should be produced from the HCL2 parser where a variable has been supplied which is not defined within the root variables. Defaults to true, but ignored if -hcl1 is defined.

  • -vault-token: Used to validate if the user submitting the job has permission to run the job according to its Vault policies. A Vault token must be supplied if the vault block allow_unauthenticated is disabled in the Nomad server configuration. If the -vault-token flag is set, the passed Vault token is added to the jobspec before sending to the Nomad servers. This allows passing the Vault token without storing it in the job file. This overrides the token found in the $VAULT_TOKEN environment variable and the vault_token field in the job file. This token is cleared from the job after validating and cannot be used within the job executing environment. Use the vault block when templating in a job with a Vault token.

  • -vault-namespace: If set, the passed Vault namespace is stored in the job before sending to the Nomad servers.

  • -var=<key=value>: Variable for template, can be used multiple times.

  • -var-file=<path>: Path to HCL2 file containing user variables.

Examples

Validate a JSON job with invalid syntax:

$ nomad job validate -json example.json
Job validation errors:
1 error occurred:
        * Missing job datacenters

Validate a job that has a configuration that causes warnings:

$ nomad job validate example.nomad.hcl
Job Warnings:
1 warning(s):

* Group "cache" has warnings: 1 error(s) occurred:

* Update max parallel count is greater than task group count (6 > 3). A destructive change would result in the simultaneous replacement of all allocations.

Job validation successful