Environment variables for a connection

The following environment variables are available in the operation post_configure_source and add_source of the script component:

• SOURCE_NODE: name of the source node in the relationship (e.g., Bash_1).

• TARGET_NODE: name of the target node in the relationship (e.g., Bash_2).

• SOURCE_HOST: name of the compute node which hosts the source node (e.g., Compute_1).

• TARGET_HOST: name of the compute node which hosts the target node (e.g., Compute_2).

• SOURCE_IP and TARGET_IP: the runtime IP address of the compute nodes, which host the source and target components, respectively.

• All properties of the components are also available. They are prefixed by SOURCE_ and TARGET_ (e.g., SOURCE_PORT, TARGET_PORT, etc.).

Examples

• Select Bash_2.

• Set the port property to 27017.

• Add an entry in the env property with key FOO value bar.

Figure 1. Set environment variable on a target node

In post_configure_source of Bash_1, we can access the environment variables of Bash_2:

# Result: Bash_2 is running on Compute_2 on port 27017
echo "$TARGET_NODE is running on $TARGET_HOST on port $TARGET_PORT"

# Result: Bash_2 has environment variable FOO with value: bar
echo "$TARGET_NODE has environment variable FOO with value: $TARGET_FOO"

last updated: 2024-12-20 12:32 UTC - commit: 2c5dd62c9d3a44179e84807a088d58725ec7bb08