[AMBARI-8479] YARN service components should indicate security state

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: ambari-server, stacks
• Labels: kerberos lifecycle security
• Epic Link: Ambari Automated Kerberization
• Assignee: Robert Levas
• Reporter: Robert Levas
• Created: 29/Nov/14 00:15
• Updated: 06/Jan/15 21:14
• Resolved: 06/Jan/15 19:59

Description

The YARN service components should indicate security state when queried by Ambari Agent via STATUS_COMMAND. Each component should determine it's state as follows:

RESOURCEMANAGER

Indicators

• Command JSON
  • config['configurations']['cluster-env']['security_enabled']
    • = “true”
• Configuration File: /etc/hadoop/conf/yarn-site.xml
  • yarn.timeline-service.enabled
    • = "true"
    • required
  • yarn.timeline-service.http-authentication.type
    • = "kerberos"
    • required
  • yarn.acl.enable
    • = "true"
    • required
  • yarn.resourcemanager.keytab
    • not empty
    • path exists and is readable
    • required
  • yarn.resourcemanager.principal
    • not empty
    • required
  • yarn.resourcemanager.webapp.spnego-keytab-file
    • not empty
    • path exists and is readable
    • required
  • yarn.resourcemanager.webapp.spnego-principal
    • not empty
    • required

Pseudocode

if indicators imply security is on and validate
    if kinit(resourcemanager principal) succeeds
        state = SECURED_KERBEROS
    else
        state = ERROR 
else
    state = UNSECURED

NODEMANAGER

Indicators

• Command JSON
  • config['configurations']['cluster-env']['security_enabled']
    • = “true”
• Configuration File: /etc/hadoop/conf/yarn-site.xml
  • yarn.timeline-service.enabled
    • = "true"
    • required
  • yarn.timeline-service.http-authentication.type
    • = "kerberos"
    • required
  • yarn.acl.enable
    • = "true"
    • required
  • yarn.nodemanager.keytab
    • not empty
    • path exists and is readable
    • required
  • yarn.nodemanager.principal
    • not empty
    • required
  • yarn.nodemanager.webapp.spnego-keytab-file
    • not empty
    • path exists and is readable
    • required
  • yarn.nodemanager.webapp.spnego-principal
    • not empty
    • required

Pseudocode

if indicators imply security is on and validate
    if kinit(nodemanager principal) succeeds
        state = SECURED_KERBEROS
    else
        state = ERROR 
else
    state = UNSECURED

APP_TIMELINE_SERVER

Indicators

• Command JSON
  • config['configurations']['cluster-env']['security_enabled']
    • = “true”
• Configuration File: /etc/hadoop/conf/yarn-site.xml
  • yarn.timeline-service.enabled
    • = "true"
    • required
  • yarn.timeline-service.http-authentication.type
    • = "kerberos"
    • required
  • yarn.acl.enable
    • = "true"
    • required
  • yarn.timeline-service.keytab
    • not empty
    • path exists and is readable
    • required
  • yarn.timeline-service.principal
    • not empty
    • required
  • yarn.timeline-service.http-authentication.kerberos.keytab
    • not empty
    • path exists and is readable
    • required
  • yarn.timeline-service.http-authentication.kerberos.principal
    • not empty
    • required

Pseudocode

if indicators imply security is on and validate
    if kinit(nodemanager principal) succeeds
        state = SECURED_KERBEROS
    else
        state = ERROR 
else
    state = UNSECURED

Note: Due to the cost of calling kinit results should be cached for a period of time before retrying. This may be an issue depending on the frequency of the heartbeat timeout.
Note: kinit calls should specify a temporary cache file which should be destroyed after command is executed - BUG-29477

Issue Links

• requires: AMBARI-8343 Components should indicate Security State (via ambari-agent)