Variable	Description
NOMAD_ALLOC_DIR	The path to the shared alloc/ directory. See here for more information.
NOMAD_TASK_DIR	The path to the task local/ directory. See here for more information.
NOMAD_SECRETS_DIR	Path to the task‘s secrets directory. See here 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). The index is unique within a given version of a job, but canaries or failed tasks in a deployment may reuse the index.
NOMAD_TASK_NAME	Task‘s name
NOMAD_GROUP_NAME	Group‘s name
NOMAD_JOB_ID	Job‘s ID, which is equal to the Job name when submitted through CLI but can be different when using the API
NOMAD_JOB_NAME	Job‘s name
NOMAD_JOB_PARENT_ID	ID of the Job‘s parent if it has one
NOMAD_DC	Datacenter in which the allocation is running
NOMAD_NAMESPACE	Namespace 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>} which are keys in the node‘s metadata.
VAULT_TOKEN	The task‘s Vault token. See Vault Integration for more details
Network-related Variables
NOMAD_IP_<label>	Host IP for the given port label. See here 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 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 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.
NOMAD_UPSTREAM_IP_<service>	IP for the given service when defined as a Consul Connect upstream.
NOMAD_UPSTREAM_PORT_<service>	Port for the given service when defined as a Consul Connect upstream.
NOMAD_UPSTREAM_ADDR_<service>	Host IP:Port for the given service when defined as a Consul Connect upstream.
NOMAD_ENVOY_ADMIN_ADDR_<service>	Local address localhost:Port for the admin port of the envoy sidecar for the given service when defined as a Consul Connect enabled service.