[ACCUMULO-1785] Alter config.sh to optionally just verify environment instead of making changes

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.4.4, 1.5.0
• Fix Version/s: 1.4.5, 1.5.1, 1.6.0
• Component/s: scripts
• Assignee: Sean Busbey
• Reporter: Sean Busbey
• Created: 17/Oct/13 21:01
• Updated: 28/Apr/14 19:03
• Resolved: 10/Dec/13 21:13

Description

Right now, the accumulo scripts presume that invocation always happens on a node in the cluster. This makes integrating with external cluster management software more difficult.

The primary issue is that bin/config.sh expects to find a full cluster configuration directory at all times. In the case of a configuration directory that doesn't specify any hosts it takes steps to set up a standalone cluster. That effort is unneeded and undesirable if we're just e.g. trying to go through init from a non-participant host.

Add an optional environment variable to have config.sh just verify the invariants needed for bin/accumulo to behave correctly. When present, don't make local directories or write to files.

Issue Links

• breaks: ACCUMULO-2153 configuration file for gc role should remain optional
• breaks: ACCUMULO-2329 "egrep: /home/user/accumulo-1.5.1/conf/gc: No such file or directory"
• relates to: ACCUMULO-1997 Perform validation on ACCUMULO_HOME