Role-based command distribution across networks
Provided is a process of managing rack-mounted computing devices in a data center with a distributed peer-to-peer management system, the process including: determining roles of data-center management computing devices in a distributed peer-to-peer data-center management system; receiving, via an out-of-band network, a data-center management command at a given data-center management computing device; distributing, based on at least some of the roles, via the out-of-band network, the data-center management command.
1. A method of managing rack-mounted computing devices in a data center with a distributed peer-to-peer management system, the method comprising:
determining roles of data-center management computing devices in a distributed peer-to-peer data-center management system;
receiving, via an out-of-band network, a data-center management command at a given data-center management computing device;
distributing, based on at least some of the roles, via the out-of-band network, the data-center management command from the given data-center management computing device to a first plurality of other data-center management computing devices; and
for each of the first plurality of other data-center management computing devices, distributing, based at least some of the roles, via the out-of-band network, the data-center management command to a respective second plurality of other data-center management computing devices, wherein:
the given data-center management computing device, the first plurality of other data-center management computing devices, and the respective second pluralities of other data-center management computing devices are each configured to manage a respective plurality of rack-mounted computing devices;
each of the pluralities of respective rack-mounted computing devices executes an in-band application that communicates on an in-band network different from the out-of-band network; and
the data-center management command is a command to update or otherwise configure a microkernel, a virtual machine, a container, an operating system, or an application executing on one or more data-center management computing devices.
2. The method of claim 1 , wherein:
determining roles of data-center management computing devices in a distributed peer-to-peer data-center management system comprises:
selecting a primary data-center management computing device;
selecting a plurality of leader data-center management computing devices by concurrently executing a plurality of respective instances of a distributed algorithm by which the respective leader is determined by consensus, each instance being executed by one of the second pluralities of other data-center management computing devices to select a respective leader for the respective one of the second pluralities of other data-center management computing devices.
3. The method of claim 2 , wherein selecting a plurality of leader data-center management computing devices by concurrently executing a plurality of respective instances of a distributed algorithm by which the respective leader is determined by consensus comprises:
detecting with a first one of the data-center management computing devices that a signal has not been received from a leader within a threshold duration of time;
incrementing or decrementing a count with the with first one of the data-center management computing devices;
sending, with the first one of the data-center management computing devices, a request to vote for a new leader along with the incremented or decremented count to other data-center management computing devices in the same second plurality of other data-center management computing devices;
receiving the request with a second one of the data-center management computing devices;
determining, with the second one of the data-center management computing devices, to vote for the first one of the data-center management computing devices, at least in part, by:
determining that the second one of the data-center management computing devices has not yet submitted a vote associated with the incremented or decremented count; and
determining that the request is the first request received by the second one of the data-center management computing devices in a given round of voting;
sending, with the second one of the data-center management computing devices, the vote to other data-center management computing devices in the same second plurality of other data-center management computing devices;
selecting a leader based on amounts of votes received by candidate data-center management computing devices.
4. The method of claim 1 , wherein:
determining roles comprises determining roles in a peer-to-peer distributed application having a structured topology.
5. The method of claim 4 , wherein:
the structured topology is a tree topology having at least three levels, wherein:
the given data-center management computing device is at a first level of the tree topology;
the first plurality of other data-center management computing devices is at a second level of the tree topology, each being adjacent to the given data-center management computing device in the tree topology;
the second pluralities of other data-center management computing devices are at a third level of the tree topology, each respective second plurality of other data-center management computing devices being adjacent to a respective one of the first plurality of other data-center management computing devices in the tree topology.
6. The method of claim 1 , wherein:
determining roles comprises determining roles in a peer-to-peer distributed application having an unstructured topology.
7. The method of claim 1 , comprising:
determining, with at least one of the first plurality of other data-center management computing devices, that the given data-center management computing device has failed;
electing, with at least one of the first plurality of other data-center management computing devices, one of the first plurality of other data-center management computing devices to serve as a replacement to the given data-center management computing device in at least some roles filled by the given data-center management computing device; and
distributing a result of the election to each the first plurality of other data-center management computing devices.
8. The method of claim 1 , comprising:
obtaining a file with configuration information from a distributed file system stored with cross-computing-device redundancy by at least a plurality of the first plurality of other data-center management computing devices, the second pluralities of other data-center management computing devices, or both.
9. The method of claim 8 , wherein:
the file is stored with consensus-based replication based on a consensus protocol, and wherein the consensus protocol is used to determine at least some roles of the data center management computing devices.
10. The method of claim 1 , wherein:
at least some of the data-center management computing devices are a rack controller executed in an out-of-band computer having a processor and memory storing instructions that when executed effectuate at least some of the operations of claim 1 ;
at least some of the data-center management computing devices manage rack-mounted computing devices via respective ones of a plurality of different power-line communication networks; and
the out-of-band network is a different network from the power-line communication networks.
11. The method of claim 1 , wherein:
at least some of the data-center management computing devices are rack-mounted computing devices executing a rack controller; and
at least some of the data-center management computing devices manage rack-mounted computing devices via an Ethernet network, without a power-line communication network connecting the at least some of the data-center management computing devices to the rack-mounted computing devices.
12. The method of claim 1 , wherein:
at least some of the data-center management computing devices are a rack-mounted computing device executing a rack controller; and
at least some of the data-center management computing devices manage rack-mounted computing devices via a power-line communication network.
13. The method of claim 1 , wherein:
at least some of the data-center management computing devices are a rack controller executed in an out-of-band computer having a processor and memory storing instructions that when executed effectuate at least some of the operations of claim 1 ; and
at least some of the data-center management computing devices manage rack-mounted computing devices via a non-power-line communication network.
14. The method of claim 1 , wherein:
at least some of the data-center management computing devices execute rack controllers, each configured to manage a plurality of rack-mounted computing devices on a respective rack, a sensor on the respective rack, and an actuator on the respective rack, wherein the sensor and actuator are not on a chassis of one of the rack-mounted computing devices on the respective rack, wherein controlling the rack-mounted computing devices comprises:
changing a boot target in an extensible firmware interface of a given one of the rack-mounted computing devices on the respective rack;
reading a value indicative of temperature from the sensor or a sensor of a given one of the rack-mounted computing devices on the respective rack; and
actuating the actuator.
15. The method of claim 1 , wherein:
the command includes a disk image containing an operating system, an application, and dependencies of the application to be installed on each of the given data-center management computing device, the first plurality of other data-center management computing devices, and the respective second pluralities of other data-center management computing devices.
16. The method of claim 1 , wherein:
the command is a command to orchestrate containers executing on at least some of the data-center management computing devices.
17. The method of claim 1 , wherein:
the command is a command to configure a network operating system.
18. The method of claim 1 , comprising implementing control and updates of rack controllers at the rack-level, in a distributed, concurrent routine.
19. The method of claim 1 , wherein distributing, based at least some of the roles, via the out-of-band network, the data-center management command to a respective second plurality of other data-center management computing devices comprises:
periodically, by each of the respective second plurality of other data-center management computing devices, sending a request to one of the first plurality of other data-center management computing devices for an update; and
receiving an update, from the one of the first plurality of other data-center management computing devices, with each of the respective second plurality of other data-center management computing devices.
20. The method of claim 1 , comprising:
initializing a data center with a computer designated to act as a seed unit to distribute configuration files via the given data-center management computing device and the first plurality of other data-center management computing devices.
21. A tangible, non-transitory, computer readable medium storing instructions that when executed by one or more processors effectuate operations comprising:
determining roles of data-center management computing devices in a distributed peer-to-peer data-center management system;
receiving, via an out-of-band network, a data-center management command at a given data-center management computing device;
distributing, based on at least some of the roles, via the out-of-band network, the data-center management command from the given data-center management computing device to a first plurality of other data-center management computing devices; and
for each of the first plurality of other data-center management computing devices, distributing, based at least some of the roles, via the out-of-band network, the data-center management command to a respective second plurality of other data-center management computing devices, wherein:
the given data-center management computing device, the first plurality of other data-center management computing devices, and the respective second pluralities of other data-center management computing devices are each configured to manage a respective plurality of rack-mounted computing devices;
each of the pluralities of respective rack-mounted computing devices executes an in-band application that communicates on an in-band network different from the out-of-band network; and
the data-center management command is a command to update or otherwise configure a microkernel, a virtual machine, a container, an operating system, or an application executing on one or more data-center management computing devices.
22. The medium of claim 21 , wherein:
determining roles of data-center management computing devices in a distributed peer-to-peer data-center management system comprises:
selecting a primary data-center management computing device;
selecting a plurality of leader data-center management computing devices by concurrently executing a plurality of respective instances of a distributed algorithm by which the respective leader is determined by consensus, each instance being executed by one of the second pluralities of other data-center management computing devices to select a respective leader for the respective one of the second pluralities of other data-center management computing devices.
23. The medium of claim 22 , wherein selecting a plurality of leader data-center management computing devices by concurrently executing a plurality of respective instances of a distributed algorithm by which the respective leader is determined by consensus comprises:
detecting with a first one of the data-center management computing devices that a signal has not been received from a leader within a threshold duration of time;
incrementing or decrementing a count with the with first one of the data-center management computing devices;
sending, with the first one of the data-center management computing devices, a request to vote for a new leader along with the incremented or decremented count to other data-center management computing devices in the same second plurality of other data-center management computing devices;
receiving the request with a second one of the data-center management computing devices;
determining, with the second one of the data-center management computing devices, to vote for the first one of the data-center management computing devices, at least in part, by:
determining that the second one of the data-center management computing devices has not yet submitted a vote associated with the incremented or decremented count; and
determining that the request is the first request received by the second one of the data-center management computing devices in a given round of voting;
sending, with the second one of the data-center management computing devices, the vote to other data-center management computing devices in the same second plurality of other data-center management computing devices;
selecting a leader based on amounts of votes received by candidate data-center management computing devices.
24. The medium of claim 21 , wherein:
determining roles comprises determining roles in a peer-to-peer distributed application having a structured topology.
25. The medium of claim 24 , wherein:
the structured topology is a tree topology having at least three levels, wherein:
the given data-center management computing device is at a first level of the tree topology;
the first plurality of other data-center management computing devices is at a second level of the tree topology, each being adjacent to the given data-center management computing device in the tree topology;
the second pluralities of other data-center management computing devices are at a third level of the tree topology, each respective second plurality of other data-center management computing devices being adjacent to a respective one of the first plurality of other data-center management computing devices in the tree topology.
26. The medium of claim 21 , wherein:
determining roles comprises determining roles in a peer-to-peer distributed application having an unstructured topology.
27. The medium of claim 21 , the instructions further comprising:
determining, with at least one of the first plurality of other data-center management computing devices, that the given data-center management computing device has failed;
electing, with at least one of the first plurality of other data-center management computing devices, one of the first plurality of other data-center management computing devices to serve as a replacement to the given data-center management computing device in at least some roles filled by the given data-center management computing device; and
distributing a result of the election to each the first plurality of other data-center management computing devices.
28. The medium of claim 21 , the instructions further comprising:
obtaining a file with configuration information from a distributed file system stored with cross-computing-device redundancy by at least a plurality of the first plurality of other data-center management computing devices, the second pluralities of other data-center management computing devices, or both.
29. The medium of claim 28 , wherein:
the file is stored with consensus-based replication based on a consensus protocol, and wherein the consensus protocol is used to determine at least some roles of the data center management computing devices.
30. The medium of claim 21 , wherein:
at least some of the data-center management computing devices are a rack controller executed in an out-of-band computer having a processor and memory storing instructions that when executed effectuate at least some of the operations of claim 1 ;
at least some of the data-center management computing devices manage rack-mounted computing devices via respective ones of a plurality of different power-line communication networks; and
the out-of-band network is a different network from the power-line communication networks.
31. The medium of claim 21 , wherein:
at least some of the data-center management computing devices are rack-mounted computing devices executing a rack controller; and
at least some of the data-center management computing devices manage rack-mounted computing devices via an Ethernet network, without a power-line communication network connecting the at least some of the data-center management computing devices to the rack-mounted computing devices.
32. The medium of claim 21 , wherein:
at least some of the data-center management computing devices are a rack-mounted computing device executing a rack controller; and
at least some of the data-center management computing devices manage rack-mounted computing devices via a power-line communication network.
33. The medium of claim 21 , wherein:
at least some of the data-center management computing devices are a rack controller executed in an out-of-band computer having a processor and memory storing instructions that when executed effectuate at least some of the operations of claim 1 ; and
at least some of the data-center management computing devices manage rack-mounted computing devices via a non-power-line communication network.
34. The medium of claim 21 , wherein:
at least some of the data-center management computing devices execute rack controllers, each configured to manage a plurality of rack-mounted computing devices on a respective rack, a sensor on the respective rack, and an actuator on the respective rack, wherein the sensor and actuator are not on a chassis of one of the rack-mounted computing devices on the respective rack, wherein controlling the rack-mounted computing devices comprises:
changing a boot target in an extensible firmware interface of a given one of the rack-mounted computing devices on the respective rack;
reading a value indicative of temperature from the sensor or a sensor of a given one of the rack-mounted computing devices on the respective rack; and
actuating the actuator.
35. The medium of claim 21 , wherein the command includes a disk image containing an operating system, an application, and dependencies of the application to be installed on each of the given data-center management computing device, the first plurality of other data-center management computing devices, and the respective second pluralities of other data-center management computing devices.
36. The medium of claim 21 , wherein the command is a command to orchestrate containers executing on at least some of the data-center management computing devices.
37. The medium of claim 21 , wherein the command is a command to configure a network operating system.
38. The medium of claim 21 , the instructions further comprising implementing control and updates of rack controllers at the rack-level, in a distributed, concurrent routine.
39. The medium of claim 21 , wherein distributing, based at least some of the roles, via the out-of-band network, the data-center management command to a respective second plurality of other data-center management computing devices comprises:
periodically, by each of the respective second plurality of other data-center management computing devices, sending a request to one of the first plurality of other data-center management computing devices for an update; and
receiving an update, from the one of the first plurality of other data-center management computing devices, with each of the respective second plurality of other data-center management computing devices.
40. The medium of claim 21 , the instructions further comprising:
initializing a data center with a computer designated to act as a seed unit to distribute configuration files via the given data-center management computing device and the first plurality of other data-center management computing devices.