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f02e097485
The following command names are changed: recmaster -> leader setrecmasterrole -> setleaderrole Command output changed for the following commands: status getcapabilities Documentation and tests are updated to reflect these changes. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
119 lines
3.3 KiB
Bash
Executable File
119 lines
3.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Test that recovery correctly handles RSNs
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# Recovery can under certain circumstances lead to old record copies
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# resurrecting: Recovery selects the newest record copy purely by RSN. At
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# the end of the recovery, the leader is the dmaster for all
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# records in all (non-persistent) databases. And the other nodes locally
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# hold the complete copy of the databases. The bug is that the recovery
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# process does not increment the RSN on the leader at the end of
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# the recovery. Now clients acting directly on the leader will
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# directly change a record's content on the leader without migration
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# and hence without RSN bump. So a subsequent recovery can not tell that
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# the leader's copy is newer than the copies on the other nodes, since
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# their RSN is the same. Hence, if the leader is not node 0 (or more
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# precisely not the active node with the lowest node number), the recovery
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# will choose copies from nodes with lower number and stick to these.
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# 1. Create a test database
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# 2. Add a record with value value1 on leader
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# 3. Force a recovery
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# 4. Update the record with value value2 on leader
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# 5. Force a recovery
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# 6. Confirm that the value is value2
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. "${TEST_SCRIPTS_DIR}/integration.bash"
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set -e
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ctdb_test_init
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#
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# Main test
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#
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TESTDB="rec_test.tdb"
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status=0
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# Make sure node 0 is not the leader
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echo "find out which node is leader"
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ctdb_onnode 0 leader
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leader="$out"
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if [ "$leader" = "0" ]; then
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echo "node 0 is leader, disable leader role on node 0"
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#
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# Note:
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# It should be sufficient to run "ctdb setleaderrole off"
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# on node 0 and wait for election and recovery to finish.
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# But there were problems related to this in this automatic
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# test, so for now use "ctdb stop" and "ctdb continue".
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#
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echo "stop node 0"
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try_command_on_node 0 $CTDB stop
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wait_until_node_has_status 0 stopped
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echo "continue node 0"
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try_command_on_node 0 $CTDB continue
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wait_until_node_has_status 0 notstopped
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ctdb_onnode 0 leader
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leader="$out"
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if [ "$leader" = "0" ]; then
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echo "failed to move leader to different node"
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exit 1
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fi
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fi
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echo "Leader:${leader}"
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# Create a temporary non-persistent database to test with
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echo "create test database $TESTDB"
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ctdb_onnode "$leader" attach "$TESTDB"
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# Wipe Test database
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echo "wipe test database"
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ctdb_onnode "$leader" wipedb "$TESTDB"
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# Add a record key=test1 data=value1
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echo "store key(test1) data(value1)"
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ctdb_onnode "$leader" writekey "$TESTDB" test1 value1
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# Fetch a record key=test1
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echo "read key(test1)"
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ctdb_onnode "$leader" readkey "$TESTDB" test1
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cat "$outfile"
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# Do a recovery
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echo "force recovery"
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ctdb_onnode "$leader" recover
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wait_until_node_has_status "$leader" recovered
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# Add a record key=test1 data=value2
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echo "store key(test1) data(value2)"
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ctdb_onnode "$leader" writekey "$TESTDB" test1 value2
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# Fetch a record key=test1
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echo "read key(test1)"
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ctdb_onnode "$leader" readkey "$TESTDB" test1
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cat "$outfile"
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# Do a recovery
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echo "force recovery"
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ctdb_onnode "$leader" recover
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wait_until_node_has_status "$leader" recovered
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# Verify record key=test1
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echo "read key(test1)"
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ctdb_onnode "$leader" readkey "$TESTDB" test1
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cat "$outfile"
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if [ "$out" = "Data: size:6 ptr:[value2]" ]; then
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echo "GOOD: Recovery did not corrupt database"
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else
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echo "BAD: Recovery corrupted database"
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status=1
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fi
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exit $status
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