Work in Progress
Overview
The sequence diagrams below are intended to be a very detailed description of the interactions that occur during the process of defining, submitting and executing a map reduce job on a secure Hadoop 2.x cluster. Different phases of the overall process are covered in each diagram.
- Bootstrap
- Job Definition
- Job Submission
- Job Initiation
- Map Task Execution
- Reduce Task Execution
- Job Completion
- Client Monitoring
Legend
The descriptions of the interactions in the sequence diagrams below take this form.
message [Protocol] ( input ) : output
The [Protocol]
portion describes the protocol, authentication mechanism and identities exchanged.
Abbreviation |
Description |
||
---|---|---|---|
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="8ec8d895-ceb1-4c96-b326-8344d758ad1f"><ac:plain-text-body><![CDATA[ |
|
Kerberos Protocol |
]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="9c429f6f-c5a4-4047-b09c-3a972b23c636"><ac:plain-text-body><![CDATA[ |
|
RPC protocol with SASL mutual authentication using Kerberos tickets. |
]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="8830d477-1b75-49a4-a23e-695d569fba2e"><ac:plain-text-body><![CDATA[ |
|
RPC protocol with SASL mutual authentication using delegation tokens. |
]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="3768d1bd-2209-419e-afe9-0620c442e2d7"><ac:plain-text-body><![CDATA[ |
|
RPC protocol with SASL mutual authentication using delegation tokens. |
]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="89077e5f-49aa-4692-9ace-5da2145e9fdc"><ac:plain-text-body><![CDATA[ |
|
Shuffle data transfer protocol between ShuffleService and ReduceTask. HTTP protocol with TODO. |
]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="75f010c1-ae5c-4e8e-9dfe-5bfebb73dd93"><ac:plain-text-body><![CDATA[ |
|
Block data transfer protocol between the DataNode and a client. HTTP protocol with block tokens plus SHA1 hash exchange. |
]]></ac:plain-text-body></ac:structured-macro> |
Suffixes are used in many cases to denote type.
Abbreviation |
Description |
---|---|
tgt |
Kerberos Ticket Granting Ticket |
kt |
Kerberos Ticket: u-jt-kt = A Kerberos Ticket for User u to access the JobTracker jt |
kp |
Kerberos Principal: nn-kp = The Kerberos principal for the NameNode nn |
dt |
Delegation Token: c-nn-dt = A delegation token for identity of the Client that can be presented to the NameNode. |
tkn |
Access Token: am-tkn = An access token that can be presented to the ApplicationMaster for access. |
tkn-sk |
Token Secret Key |
Kerberos principals use the principal abbreviation and the kp suffix.
Abbreviation |
Description |
---|---|
|
NameNode's Kerberos Principal |
|
DataNode's Kerberos Principal (Unique principal for each DataNode on every node) |
|
JobTracker's Kerberos Principal |
|
TaskTracker's Kerberos Principal (Unique principal for each TaskTracker on every node) |
Kerberos tickets use the consumer principal abbreviation, provider principal abbreviation and kt suffix.
Abbreviation |
Description |
---|---|
|
Kerberos service ticket for User u to access NameNode nn |
|
Kerberos service ticket for User u to access JobTracker jt |
|
Kerberos service ticket for DataNode dn to access NameNode nn |
|
Kerberos service ticket for JobTracker dn to access NameNode nn |
|
Kerberos service ticket for TaskTracker tt to access JobTracker jt |
Secure MapReduce2 - Bootstrap
Secure MapReduce2 - Job Definition
Secure MapReduce2 - Job Submission
Secure MapReduce2 - Job Initiation
Secure MapReduce2 - Map Task Execution
Secure MapReduce2 - Reduce Task Execution
Secure MapReduce2 - Job Completion
Secure MapReduce2 - Client Monitoring