[kudu-CR] mini-cluster: support parallel multi-master clusters

["Dan Burkert (Code Review)" <ge...@cloudera.org>]

Hello Tidy Bot, Kudu Jenkins, Adar Dembo, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/8280

to look at the new patch set (#4).

Change subject: mini-cluster: support parallel multi-master clusters
......................................................................

mini-cluster: support parallel multi-master clusters

This commit refactors the mini-clusters to internally use reserved
sockets for their child daemons. Reserved sockets are simply sockets
bound to a random port with SO_REUSEPORT. As a result, master addresses
for multi-master mini clusters no longer need to hard-coded master
ports, and the associated ctest resource lock. This also significantly
lessens the chances that port conflicts will occur, although it is
still possible when masters are restarted during tests. To mitigate
that on Linux, tests are still run in a unique subnet.

WIP: This commit removes the ability to set the desired master ports.
master_migration-itest relies on this functionality, so it's currently
broken.

Change-Id: I0b0ff7bfc179d8fdb1ed306d1bbd12acddeb060c
---
M src/kudu/client/client-test.cc
M src/kudu/integration-tests/CMakeLists.txt
M src/kudu/integration-tests/catalog_manager_tsk-itest.cc
M src/kudu/integration-tests/client-negotiation-failover-itest.cc
M src/kudu/integration-tests/client-stress-test.cc
M src/kudu/integration-tests/master-stress-test.cc
M src/kudu/integration-tests/master_cert_authority-itest.cc
M src/kudu/integration-tests/master_failover-itest.cc
M src/kudu/integration-tests/master_migration-itest.cc
M src/kudu/integration-tests/master_replication-itest.cc
M src/kudu/integration-tests/security-faults-itest.cc
M src/kudu/integration-tests/security-itest.cc
M src/kudu/integration-tests/security-master-auth-itest.cc
M src/kudu/integration-tests/token_signer-itest.cc
M src/kudu/integration-tests/webserver-stress-itest.cc
M src/kudu/master/mini_master.cc
M src/kudu/mini-cluster/CMakeLists.txt
M src/kudu/mini-cluster/external_mini_cluster-test.cc
M src/kudu/mini-cluster/external_mini_cluster.cc
M src/kudu/mini-cluster/external_mini_cluster.h
M src/kudu/mini-cluster/internal_mini_cluster.cc
M src/kudu/mini-cluster/internal_mini_cluster.h
M src/kudu/mini-cluster/mini_cluster.cc
M src/kudu/mini-cluster/mini_cluster.h
M src/kudu/tools/CMakeLists.txt
M src/kudu/tools/ksck_remote-test.cc
M src/kudu/tools/tool_action_test.cc
27 files changed, 180 insertions(+), 276 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/80/8280/4
-- 
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I0b0ff7bfc179d8fdb1ed306d1bbd12acddeb060c
Gerrit-Change-Number: 8280
Gerrit-PatchSet: 4
Gerrit-Owner: Dan Burkert <da...@apache.org>
Gerrit-Reviewer: Adar Dembo <ad...@cloudera.com>
Gerrit-Reviewer: Dan Burkert <da...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Tidy Bot