Variable	Description
NOMAD_ALLOC_DIR	The path to the shared alloc/ directory. See [here](/docs/runtime/environment.html#task-directories) for more information.
NOMAD_TASK_DIR	The path to the task local/ directory. See [here](/docs/runtime/environment.html#task-directories) for more information.
NOMAD_SECRETS_DIR	Path to the task's secrets directory. See [here](/docs/runtime/environment.html#task-directories) for more information.
NOMAD_MEMORY_LIMIT	Memory limit in MB for the task
NOMAD_CPU_LIMIT	CPU limit in MHz for the task
NOMAD_ALLOC_ID	Allocation ID of the task
NOMAD_ALLOC_NAME	Allocation name of the task
NOMAD_ALLOC_INDEX	Allocation index; useful to distinguish instances of task groups. From 0 to (count - 1).
NOMAD_TASK_NAME	Task's name
NOMAD_GROUP_NAME	Group's name
NOMAD_JOB_NAME	Job's name
NOMAD_DC	Datacenter in which the allocation is running
NOMAD_REGION	Region in which the allocation is running
NOMAD_META_<key>	The metadata value given by key on the task's metadata. Note that this is different from [${meta.<key>}](/docs/runtime/interpolation.html#node-variables-) which are keys in the node's metadata.
VAULT_TOKEN	The task's Vault token. See [Vault Integration](/docs/vault-integration/index.html) for more details
Network-related Variables
NOMAD_IP_<label>	Host IP for the given port label. See [here](/docs/job-specification/network.html) for more information.
NOMAD_PORT_<label>	Port for the given port label. Driver-specified port when a port map is used, otherwise the host's static or dynamic port allocation. Services should bind to this port. See [here](/docs/job-specification/network.html) for more information.
NOMAD_ADDR_<label>	Host IP:Port pair for the given port label.
NOMAD_HOST_PORT_<label>	Port on the host for the port label. See [here](/docs/job-specification/network.html#mapped-ports) for more information.
NOMAD_IP_<task>_<label>	Host IP for the given port label and task for tasks in the same task group.
NOMAD_PORT_<task>_<label>	Port for the given port label and task for tasks in the same task group. Driver-specified port when a port map is used, otherwise the host's static or dynamic port allocation. Services should bind to this port.
NOMAD_ADDR_<task>_<label>	Host IP:Port pair for the given port label and task for tasks in the same task group.
NOMAD_HOST_PORT_<task>_<label>	Port on the host for the port label and task for tasks in the same task group.