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Process Manager Interface Narayan Desai, Rusty Lusk, Rick Bradshaw

Process Manager Interface Narayan Desai, Rusty Lusk, Rick Bradshaw. Outline. PM Functionality PM Syntax PM Commands PM Datatypes PM Events PM Examples PM BNF PM Schema. Process Manager Functionality.

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Process Manager Interface Narayan Desai, Rusty Lusk, Rick Bradshaw

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  1. Process Manager Interface Narayan Desai, Rusty Lusk, Rick Bradshaw

  2. Outline • PM Functionality • PM Syntax • PM Commands • PM Datatypes • PM Events • PM Examples • PM BNF • PM Schema

  3. Process Manager Functionality • Starts process groups, with specification of environments of application processes, either collectively or on a process-by-process basis • Executable • Arguments • Environment variables • User • Resource limits • Hosts for each process • Working directory • Queries the state of a running process group, returning some startup parameters • Delivers signals to all processes in a process group • Terminates a process group • After process group exit, can wait on the group to collect exit codes and output.

  4. Process Manager Syntax • The Process Manager uses the “less restricted syntax” style presented elsewhere • Each message to it does three things: • Describes a process group specification to be matched or created • Conveys a command, with arguments • Specifies an object to be returned

  5. Process Manager Commands • CreateProcessGroup • Takes as input a ProcessGroupSpecification object • Returns a PGID • GetProcessGroup • Takes as input a ProcessGroup object which is matched against • Returns a ProcessGroups container object containing requested fields from matched process group instances • SignalProcessGroup • Takes as input a Process Group object which is matched against • Takes as argument a signal name and the scope of the signal (top-level processes or also forkees) • Returns requested fields from the process groups signaled

  6. Process Manager Commands (cont.) • KillProcessGroup • Terminates matching process groups • Best effort to really kill processes, which may require repeated signalling • Returns the process groups matched • WaitProcessGroup • Returns exit code information and stream output from matching completed process groups • Purges such information from the Process Manager state

  7. Process Manager Datatypes • ProcessGroupSpecification • Used as input to CreateProcessGroup • ProcessGroup • Used as matching description and returned description in other commands

  8. Process Manager Events • Generated when a process group is successfully started: <Event>   <Component>process-manager</Component>   <Message>ProcessStart</Message>   <Data>29</Data> </Event> • Generated when a process group terminates: <Event>   <Component>process-manager</Component>   <Message>ProcessEnd</Message>   <Data>29</Data> </Event>

  9. Process Manager Examples - 1 <CreateProcessGroup>   <ProcessGroupSpecification>      <User>desai</User>      <Size>8</Size>      <Executable>/bin/false</Executable>      <CWD>/tmp</CWD>      <Diversions>        <Diversion>           <Range>6-7</Range>           <Executable>/bin/true</Executable>           <Environment>             <Variable>               <Name>LD_LIBRARY_PATH</Name>               <Value>/local/lib</Value>             </Variable>           </Environment>           <Arguments>

  10. Process Manager Examples - 2              <Argument>-v</Argument>           </Arguments>       </Diversion>     </Diversions>     <HostSpecification>       <Mode>Unordered</Mode>       <Value>ccn1                     ccn2                     ccn3                     ccn4                     ccn5                     ccn6                     ccn7                     ccn8        </Value>     </HostSpecification>   </ProcessGroupSpecification> </CreateProcessGroup>

  11. Process Manager Examples - 3 <GetProcessGroup>   <ProcessGroup>     <PGID>29</PGID>     <Processes>       <Process>          <Host match='false'/>       </Process>     </Processes>   </ProcessGroup> </GetProcessGroup>

  12. Process Manager Examples - 4 ProcessGroups>   <ProcessGroup>      <PGID>29</PGID>      <Processes>         <Process>            <Host>ccn1</Host>         </Process>         <Process>            <Host>ccn2</Host>         </Process>         <Process>            <Host>ccn3</Host>         </Process>         <Process>            <Host>ccn4</Host>         </Process>         <Process>            <Host>ccn5</Host>         </Process>         <Process>            <Host>ccn6</Host>         </Process>         <Process>            <Host>ccn7</Host>         </Process>         <Process>            <Host>ccn8</Host>         </Process>      </Processes>   </ProcessGroup> </ProcessGroups>

  13. Process Manager Examples - 5 <GetProcessGroup>   <ProcessGroup>      <PGID>29</PGID>      <Status match='false'/>   </ProcessGroup> </GetProcessGroup> <ProcessGroups>   <ProcessGroup>      <PGID>29</PGID>      <Status>Finished</Status>   </ProcessGroup> </ProcessGroups>

  14. Process Manager Examples - 6 <WaitProcessGroup>   <ProcessGroup>      <PGID>29</PGID>      <ExitStatus>        <Status>            <Code negate='true'>0</Code>            <Host match='false'/>        </Status>      </ExitStatus>      <Output>        <Stream>           <Name op='re'> stdout | stderr </name>           <Value match='false'/>        </Stream>      </Output>    </ProcessGroup> </WaitProcessGroup>

  15. Process Manager Examples - 7 <ProcessGroups>   <ProcessGroup>     <PGID>29</PGID>     <ExitStatus>       <Status>         <Host>ccn2</Host>         <Code>1</Code</Host>       </Status>       <Status>         <Host>ccn6</Host>         <Code>255</Code>       </Status>    </ExitStatus>    <Output>       <Stream>         <Name>stdout</Name>

  16. Process Manager Examples - 8         <Value>process 0 on ccn1 process 1 on ccn2 process 2 on ccn3 process 3 on ccn4 process 4 on ccn5 process 5 on ccn6 process 6 on ccn7 process 7 on ccn8 </Value>       </Stream>       <Stream>         <Name>stderr</Name>         <Value/>       </Stream>     </Output>   </ProcessGroup> </ProcessGroups>

  17. Process Manager BNF - 1 [InMsg] ::= [CreateCommand] | [Query] [CreateCommand] ::= <CreateProcessGroup> [PGSpecification]                                      </CreateProcessGroup> [PGSpecification] ::= <ProcessGroupSpecification> [PGSattrs]                                    </ProcessGroupSpecification> [PGSattrs] ::= [PGSattr] | [PGSattr] [PGSattrs] [PGSattr] ::= <[FieldName]>[FieldValue]</[FieldName]> [Query] ::= <[ArgCmd] [Arguments]> [ProcessGroup] </[ArgCmd]> |                   <[Command]> [ProcessGroup] </[Command]> [Command] ::= KillProcessGroup | GetProcessGroup | WaitProcessGroup [ArgCmd] ::= SignalProcessGroup [Arguments] ::= [] | [Argument] | [Argument] [Arguments] [Argument] ::= [identifier]=[identifier] [ProcessGroup] ::= <ProcessGroup> [Fields] </ProcessGroup> [Fields] ::= [Field] | [Field] [Fields]|                   [MultiField] | [MultiField] [Fields]

  18. Process Manager BNF - 2 [Field] ::= <[FieldName]> [FieldValue] </[FieldName]> [FieldName] ::= PGID|User|Size|Executable [FieldValue] ::= identifier [MultiField] ::= <[FieldGroup]> [MFields] </[FieldGroup]> [MFields] ::= [MField] | [MField] [MFields] [MField] ::= <[MFName] [Qualifiers]>[MFValue]</[MFName]> [Qualifiers] ::= [] | [Qualifier] [Qualifiers] [Qualifier] ::= [BooleanKey]=[BooleanValue]|                        [StringKey]=[StringValue] [BooleanKey] ::= 'negate' | 'match' | 'return' [BooleanValue] ::= 'true' | 'false' [StringKey] ::= 'op' [StringValue] ::= 'eq' | 'ne' | 'lt' | 'gt' | 'le' | 'ge' | 'range' | 're' [MFName] ::= HostSpec | Environment | Diversions [MFValue] :: identifier

  19. Process Manager Schema - 1 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xml:lang="en">   <xsd:annotation>     <xsd:documentation>       Process Manager component schema       SciDAC SSS project, 2004       Andrew Lusk alusk@mcs.anl.gov       Narayan Desai desai@mcs.anl.gov     </xsd:documentation>   </xsd:annotation> <xsd:simpleType name='BooleanType'>     <xsd:restriction base='xsd:string'>       <xsd:pattern value='true|false'/>     </xsd:restriction>   </xsd:simpleType> <xsd:simpleType name='IntegerOps'>     <xsd:restriction base='xsd:string'>       <xsd:pattern value='eq|lt|gt|range|re'/>     </xsd:restriction>   </xsd:simpleType> <xsd:simpleType name='StringOps'>     <xsd:restriction base='xsd:string'>       <xsd:pattern value='eq|re'/>     </xsd:restriction>   </xsd:simpleType>

  20. Process Manager Schema - 2 <xsd:simpleType name='Signals'>     <xsd:restriction base='xsd:string'>       <xsd:pattern       value='ABRT|ALRM|BUS|CHLD|CLD|CONT|FPE|HUP|ILL|INT|IO|IOT|KILL|PIPE|POLL|PROF|PWR|QUIT|SEGV|STOP|SYS|TERM|TRAP|TSTP|TTIN|TTOU|URG|USR1|USR2|VTALRM|WINCH|XCPU|XFSZ'/>     </xsd:restriction>   </xsd:simpleType> <xsd:attributeGroup name='BaseLRSQuery'>     <xsd:attribute name='match' type='BooleanType'/>     <xsd:attribute name='negate' type='BooleanType'/>     <xsd:attribute name='return' type='BooleanType'/>   </xsd:attributeGroup> <xsd:complexType name='IntegerQueryAttribute'>     <xsd:simpleContent>       <xsd:extension base='xsd:integer'>         <xsd:attributeGroup ref='BaseLRSQuery'/>         <xsd:attribute name='op' type='IntegerOps'/>       </xsd:extension>     </xsd:simpleContent>   </xsd:complexType> <xsd:complexType name='StringQueryAttribute'>     <xsd:simpleContent>

  21. Process Manager Schema - 3       <xsd:extension base='xsd:string'>         <xsd:attributeGroup ref='BaseLRSQuery'/>         <xsd:attribute name='op' type='IntegerOps'/>       </xsd:extension>     </xsd:simpleContent>   </xsd:complexType> <xsd:complexType name='ProcessQueryType'>     <xsd:sequence>       <xsd:element name='Host' type='StringQueryAttribute' minOccurs='0'/>       <xsd:element name='PID' type='StringQueryAttribute' minOccurs='0'/>       <xsd:element name='Session' type='StringQueryAttribute' minOccurs='0'/>     </xsd:sequence>   </xsd:complexType> <xsd:complexType name='ProcessSet'>     <xsd:choice minOccurs='1'>       <xsd:element name='Process' type='ProcessQueryType'/>     </xsd:choice>   </xsd:complexType>   <xsd:complexType name='ProcessGroupQuery'>     <xsd:sequence>       <xsd:element name='PGID' type='IntegerQueryAttribute' minOccurs='0'/>

  22. Process Manager Schema - 4       <xsd:element name='Size' type='IntegerQueryAttribute' minOccurs='0'/>       <xsd:element name='User' type='StringQueryAttribute' minOccurs='0'/>       <xsd:element name='Status' type='StringQueryAttribute' minOccurs='0'/>       <xsd:element name='Processes' type='ProcessSet' minOccurs='0'/>     </xsd:sequence>   </xsd:complexType> <xsd:complexType name='PGQuery'>     <xsd:choice minOccurs='1' maxOccurs='unbounded'>       <xsd:element name='ProcessGroup' type='ProcessGroupQuery'/>     </xsd:choice>   </xsd:complexType> <xsd:element name='GetProcessGroup' type='PGQuery'/>   <xsd:element name='KillProcessGroup' type='PGQuery'/>   <xsd:element name='WaitProcessGroup' type='PGQuery'/> <xsd:element name='SignalProcessGroup'>     <xsd:complexType>       <xsd:choice minOccurs='1' maxOccurs='unbounded'>         <xsd:element name='ProcessGroup' type='ProcessGroupQuery'/>       </xsd:choice>       <xsd:attribute name='signal' type='Signals' use='required'/>     </xsd:complexType>   </xsd:element> </xsd:schema>

  23. Notes

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