Scripting language executor service for applications
View Patent ↗A method and system for executing scripts on virtual machines is provided. The system includes an executor service that accepts scripts, parameters, authentication information from another process that needs to invoke a script on a target virtual machine (or group of virtual machines). The executor service remains running even after a script has completed execution. The executor service accepts any number of scripts and places them in a command queue. Agents running on the target virtual machine(s) check-in with the executor service to receive scripts from the command queue. Also, the executor service may directly invoke a script using a persistent connection to a virtual machine management center.
1. A method for executing a script on a plurality of virtual machines, the method comprising:
loading, by a first process, a library configured to connect to a virtual management center and enable remote execution of a script on the plurality of virtual machines;
establishing a connection to the virtual management center based on the loaded library;
receiving, from a second process, a command request having a script and specifying at least one target virtual machine of the plurality of virtual machines on which to invoke the script;
responsive to determining an agent is available on the target virtual machine, storing the received command request associated with the target virtual machine in a command queue; and
responsive to determining an agent is not available on the target virtual machine, invoking execution of the script on the target virtual machine using the connection to the virtual management center.
2. The method of claim 1 , further comprising:
responsive to receiving a check-in request from an agent executing in a virtual machine, determining whether any command requests associated with the virtual machine are available in the command queue; and
transmitting, to the agent executing in the virtual machine, at least one script associated with the command requests retrieved from the command queue.
3. The method of claim 2 , wherein the determining whether any command requests associated with the target virtual machine further comprises:
identifying any command requests having a target identifier matching the virtual machine of the check-in request;
identifying any command requests configured for multicast operation and having a target identifier matching at least a portion of the virtual machine of the check-in request; and
identifying any command requests configured for broadcast operation.
4. The method of claim 1 , further comprising:
receiving, from the target virtual machine, script output resulting from execution of the script on the target virtual machine; and
modifying the command queue to update a status of the command request and store the script output.
5. The method of claim 4 , further comprising:
transmitting the updated status of the command request to the second process in response to receiving, from the second process, a status request associated with the command request.
6. The method of claim 1 , wherein the receiving the command request further comprises:
receiving, from the second process comprising a Java application, the command request having a PowerShell script configured to be executed on the plurality of virtual machines.
7. A system for executing scripts on a plurality of virtual machines, comprising:
one or more computer processors; and
a memory containing a program which, when executed by the one or more computer processors, is configured to perform an operation comprising:
loading, by a first process executing in the computer processor, a library configured to connect to a virtual management center and enable remote execution of a script on the plurality of virtual machines;
establishing a connection to the virtual management center based on the loaded library;
receiving, from a second process executing in the computer processor, a command request having a script and specifying at least one target virtual machine of the plurality of virtual machines on which to invoke the script;
responsive to determining an agent is available on the target virtual machine, storing the received command request associated with the target virtual machine in a command queue; and
responsive to determining an agent is not available on the target virtual machine, invoking execution of the script on the target virtual machine using the connection to the virtual management center.
8. The system of claim 7 , wherein the operation further comprises:
responsive to receiving a check-in request from an agent executing in a virtual machine, determining whether any command requests associated with the virtual machine are available in the command queue; and
transmitting, to the agent executing in the virtual machine, at least one script associated with the command requests retrieved from the command queue.
9. The system of claim 8 , wherein the determining whether any command requests associated with the target virtual machine further comprises:
identifying any command requests having a target identifier matching the virtual machine of the check-in request;
identifying any command requests configured for multicast operation and having a target identifier matching at least a portion of the virtual machine of the check-in request; and
identifying any command requests configured for broadcast operation.
10. The system of claim 7 , wherein the operation further comprises:
receiving, from the target virtual machine, script output resulting from execution of the script on the target virtual machine;
modifying the command queue to update a status of the command request and store the script output.
11. The system of claim 10 , wherein the operation further comprises:
transmitting the updated status of the command request to the second process in response to receiving, from the second process, a status request associated with the command request.
12. The system of claim 7 , wherein the receiving the command request further comprises:
receiving, from the second process comprising a Java application, the command request having a PowerShell script configured to be executed on the plurality of virtual machines.
13. A non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code comprising:
computer-readable program code configured to load, by a first process, a library configured to connect to a virtual management center and enable remote execution of a script on a plurality of virtual machines;
computer-readable program code configured to establish a connection to the virtual management center based on the loaded library;
computer-readable program code configured to receive, from a second process, a command request having a script and specifying at least one target virtual machine of the plurality of virtual machines on which to invoke the script;
computer-readable program code configured to, responsive to determining an agent is available on the target virtual machine, store the received command request associated with the target virtual machine in a command queue; and
computer-readable program code configured to, responsive to determining an agent is not available on the target virtual machine, invoke execution of the script on the target virtual machine using the connection to the virtual management center.
14. The non-transitory computer-readable storage medium of claim 13 , further comprising:
computer-readable program code configured to, responsive to receiving a check-in request from an agent executing in a virtual machine, determine whether any command requests associated with the virtual machine are available in the command queue; and
computer-readable program code configured to transmit, to the agent executing in the virtual machine, at least one script associated with the command requests retrieved from the command queue.
15. The non-transitory computer-readable storage medium of claim 14 , wherein the computer-readable program code configured to determine whether any command requests associated with the target virtual machine further comprises:
computer-readable program code configured to identify any command requests having a target identifier matching the virtual machine of the check-in request;
computer-readable program code configured to identify any command requests configured for multicast operation and having a target identifier matching at least a portion of the virtual machine of the check-in request; and
computer-readable program code configured to identify any command requests configured for broadcast operation.
16. The non-transitory computer-readable storage medium of claim 13 , further comprising:
computer-readable program code configured to, receive, from the target virtual machine, script output resulting from execution of the script on the target virtual machine; and
computer-readable program code configured to modify the command queue to update a status of the command request and store the script output.
17. The non-transitory computer-readable storage medium of claim 16 , further comprising:
computer-readable program code configured to transmit the updated status of the command request to the second process in response to receiving, from the second process, a status request associated with the command request.
18. The non-transitory computer-readable storage medium of claim 13 , wherein the computer-readable program code configured to receive the command request further comprises:
computer-readable program code configured to receive, from the second process comprising a Java application, the command request having a PowerShell script configured to be executed on the plurality of virtual machines.