Dynamically managing a serial port interface of virtualization software on host device wherein execution is performed not during boot sequence
One or more examples provide techniques to dynamically manage serial port interface(s) of virtualization software executing in a host device. In an example, a method of managing a serial port interface of a virtualization software executing on a host device includes: receiving input characters through the serial port interface to a serial port of the host device; parsing the input characters to detect a character sequence; and connecting the serial port interface to a first service executing in the virtualization software in response to the character sequence and during execution of the virtualization software on the host device.
1. A method of managing a serial port interface of virtualization software executing on a host device, comprising:
receiving input characters through the serial port interface to a hardware serial port of the host device;
parsing the input characters to detect a character sequence; and
connecting the serial port interface to a first service executing in the virtualization software in response to the character sequence and during execution of the virtualization software on the host device and not during a boot sequence.
2. The method of claim 1 , wherein the host device is a headless device not supporting connection to any human interface device.
3. The method of claim 1 , wherein the first service is one of a plurality of services executable in the virtualization software, the plurality of services including a console user interface service, a shell service, a logging service, and a debugging service.
4. The method of claim 1 , further comprising: connecting the serial port interface to a second service executing in the virtualization software in response to execution of a configuration application by the virtualization software.
5. The method of claim 4 , wherein the configuration application is executed by the virtualization software in response to user input to a command line interface of the virtualization software, or an application programming interface of the virtualization software, received through a network port of the host device.
6. The method of claim 4 , wherein the configuration application disconnects the serial port interface from the first service and connects the serial port interface to the second service.
7. The method of claim 1 , further comprising:
connecting the serial port interface to an initial service during a boot sequence of the virtualization software based on data stored in firmware of the host device.
8. The method of claim 7 , wherein the data stored in the firmware comprises at least one of a headless flag and hardware serial port parameter data.
9. The method of claim 1 , further comprising:
connecting the serial port interface to an initial service during a boot sequence of the virtualization software based on boot options that are parametric input to the boot sequence.
10. The method of claim 1 , further comprising:
receiving a request to connect the serial port interface to a second service executing in the virtualization software; and
refusing the request in response to another serial port interface being connected to the second service.
11. A computing device executing virtualization software, the computing device comprising:
a hardware serial port;
a memory having a program for managing a serial port interface of the virtualization software to the hardware serial port; and
a processor configured to execute the program to:
receive input characters through the serial port interface;
parse the input characters to detect a character sequence; and
connect the serial port interface to a first service executing in the virtualization software in response to the character sequence and during execution of the virtualization software on the computing device and not during a boot sequence.
12. The computing device of claim 11 , wherein the computing device is a headless device not supporting connection to any human interface device.
13. The computing device of claim 11 , wherein the processor is further configured to execute the program to:
connect the serial port interface to a second service executing in the virtualization software in response to execution of a configuration application by the virtualization software.
14. The computing device of claim 13 , further comprising:
a network port;
wherein the configuration application is executed by the virtualization software in response to user input to a command line interface of the virtualization software, or an application programming interface of the virtualization software, received through the network port.
15. The computing device of claim 11 , further comprising:
another hardware serial port;
wherein the processor is further configured to execute the program to:
receive a request to connect the serial port interface to a second service executing in the virtualization software; and
refuse the request in response to another serial port interface of the virtualization software to the other hardware serial port being connected to the second service.
16. A non-transitory computer-readable storage medium comprising instructions, which when executed in a computer system, causes the computer system to carry out a method of managing a serial port interface of virtualization software executing on a host device, the method comprising:
receiving input characters through the serial port interface to a hardware serial port of the host device;
parsing the input characters to detect a character sequence; and
connecting the serial port interface to a first service executing in the virtualization software in response to the character sequence and during execution of the virtualization software on the host device and not during a boot sequence.
17. The non-transitory computer-readable storage medium of claim 16 , wherein the host device is a headless device not supporting connection to any human interface device.
18. The non-transitory computer-readable storage medium of claim 16 , further comprising:
connecting the serial port interface to a second service executing in the virtualization software in response to execution of a configuration application by the virtualization software.
19. The non-transitory computer-readable storage medium of claim 16 , further comprising:
connecting the serial port interface to an initial service during a boot sequence of the virtualization software based on data stored in firmware of the host device.
20. The non-transitory computer-readable storage medium of claim 16 , further comprising:
receiving a request to connect the serial port interface to a second service executing in the virtualization software; and
refusing the request in response to another serial port interface being connected to the second service.