Node Ready Scripts

Each label can specify a ready script with ready-script. This script can be used to perform any last minute changes to a node after it has been launched but before it is put in the READY state to receive jobs. In particular, it can read the files in /etc/nodepool to perform multi-node related setup.

Those files include:

/etc/nodepool/role

Either the string primary or sub indicating whether this node is the primary (the node added to the target and which will run the job), or a sub-node.

/etc/nodepool/node

The IP address of this node.

/etc/nodepool/node_private

The private IP address of this node.

/etc/nodepool/primary_node

The IP address of the primary node, usable for external access.

/etc/nodepool/primary_node_private

The Private IP address of the primary node, for internal communication.

/etc/nodepool/sub_nodes

The IP addresses of the sub nodes, one on each line, usable for external access.

/etc/nodepool/sub_nodes_private

The Private IP addresses of the sub nodes, one on each line.

/etc/nodepool/id_rsa

An OpenSSH private key generated specifically for this node group.

/etc/nodepool/id_rsa.pub

The corresponding public key.

/etc/nodepool/provider

Information about the provider in a shell-usable form. This includes the following information:

NODEPOOL_PROVIDER

The name of the provider

NODEPOOL_CLOUD

The name of the cloud

NODEPOOL_REGION

The name of the region

NODEPOOL_AZ

The name of the availability zone (if available)