Command: node eligibility
The node eligibility command is used to toggle scheduling eligibility for a
given node. By default nodes are eligible for scheduling meaning they can
receive placements and run new allocations. Nodes that have their scheduling
eligibility disabled are ineligible for new placements.
The node drain command automatically disables eligibility. Disabling
a drain restore eligibility by default.
Disable scheduling eligibility is useful when draining a set of nodes: first disable eligibility on each node that will be drained. Then drain each node. If you just drain each node allocations may get rescheduled multiple times as they get placed on nodes about to be drained.
Disabling scheduling eligibility may also be useful when investigating poorly behaved nodes. It allows operators to investigate the current state of a node without the risk of additional work being assigned to it.
Usage
A -self flag can be used to toggle eligibility of the local node. If this is
not supplied, a node ID or prefix must be provided. If there is an exact match,
the eligibility will be adjusted for that node. Otherwise, a list of matching
nodes and information will be displayed.
It is also required to pass one of -enable or -disable, depending on which
operation is desired.
If ACLs are enabled, this option requires a token with the 'node:write' capability.
General Options
-address=<addr>: The address of the Nomad server. Overrides theNOMAD_ADDRenvironment variable if set. Defaults tohttp://127.0.0.1:4646.-region=<region>: The region of the Nomad server to forward commands to. Overrides theNOMAD_REGIONenvironment variable if set. Defaults to the Agent's local region.-no-color: Disables colored command output. Alternatively,NOMAD_CLI_NO_COLORmay 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_COLORmay be set. This option has no effect if-no-coloris also used.-ca-cert=<path>: Path to a PEM encoded CA cert file to use to verify the Nomad server SSL certificate. Overrides theNOMAD_CACERTenvironment 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-certand-ca-pathare specified,-ca-certis used. Overrides theNOMAD_CAPATHenvironment 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 theNOMAD_CLIENT_CERTenvironment variable if set.-client-key=<path>: Path to an unencrypted PEM encoded private key matching the client certificate from-client-cert. Overrides theNOMAD_CLIENT_KEYenvironment variable if set.-tls-server-name=<value>: The server name to use as the SNI host when connecting via TLS. Overrides theNOMAD_TLS_SERVER_NAMEenvironment variable if set.-tls-skip-verify: Do not verify TLS certificate. This is highly not recommended. Verification will also be skipped ifNOMAD_SKIP_VERIFYis set.-token: The SecretID of an ACL token to use to authenticate API requests with. Overrides theNOMAD_TOKENenvironment variable if set.
Eligibility Options
-enable: Enable scheduling eligibility.-disable: Disable scheduling eligibility.-self: Set eligibility for the local node.-yes: Automatic yes to prompts.
Examples
Enable scheduling eligibility on node with ID prefix "574545c5":
Disable scheduling eligibility on the local node: