glusterd: clean up old port and allocate new one on every restart

    Backport of http://review.gluster.org/#/c/15005/9.

GlusterD as of now was blindly assuming that the brick port which was
already allocated would be available to be reused and that assumption
is absolutely wrong.

Solution : On first attempt, we thought GlusterD should check if the
already allocated brick ports are free, if not allocate new port and
pass it to the daemon. But with that approach there is a possibility
that if PMAP_SIGNOUT is missed out, the stale port will be given back
to the clients where connection will keep on failing. Now given the
port allocation always start from base_port, if everytime a new port
has to be allocated for the daemons, the port range will still be
under control. So this fix tries to clean up old port using
pmap_registry_remove () if any and then goes for pmap_registry_alloc ()

This patch is being ported to 3.8 branch because, the brick process
blindly re-using old port, without registering with the pmap server,
causes snapd daemon to not start properly, even though snapd registers
with the pmap server. With this patch, all the brick processes and
snapd will register with the pmap server to either get the same port,
or a new port, and avoid port collision.

> Reviewed-on: http://review.gluster.org/15005
> Smoke: Gluster Build System <jenkins@build.gluster.org>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: Avra Sengupta <asengupt@redhat.com>

(cherry picked from commit c3dee6d35326c6495591eb5bbf7f52f64031e2c4)

Change-Id: If54a055d01ab0cbc06589dc1191d8fc52eb2c84f
BUG: 1369766
Signed-off-by: Atin Mukherjee <amukherj@redhat.com>
Reviewed-on: http://review.gluster.org/15308
Tested-by: Avra Sengupta <asengupt@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Niels de Vos <ndevos@redhat.com>

2 files changed, 5 insertions, 47 deletions

diff --git a/tests/bugs/glusterd/1313628-import-brick-ports-always.t b/tests/bugs/glusterd/1313628-import-brick-ports-always.t
deleted file mode 100755
index d04c4293466..00000000000
--- a/tests/bugs/glusterd/1313628-import-brick-ports-always.t
+++ /dev/null
@@ -1,47 +0,0 @@
-#!/bin/bash
-. $(dirname $0)/../../include.rc
-. $(dirname $0)/../../cluster.rc
-
-## Check that brick ports are always copied on import
-## --------------------------------------------------
-## This test checks that the brick ports are copied on import by checking that
-## they don't change when the following happens,
-##  - Stop a volume
-##  - Stop glusterd
-##  - Start the stopped volume
-##  - Start the stopped glusterd
-
-function get_brick_port() {
-  local VOL=$1
-  local BRICK=$2
-  $CLI2 volume status $VOL $BRICK --xml | sed -ne 's/.*<port>\([0-9]*\)<\/port>/\1/p'
-}
-
-
-cleanup
-
-TEST launch_cluster 2
-TEST $CLI1 peer probe $H2
-EXPECT_WITHIN $PROBE_TIMEOUT 1 peer_count
-
-# Create and start volume so that brick port assignment happens
-TEST $CLI1 volume create $V0 $H1:$B1/$V0 $H2:$B2/$V0
-TEST $CLI1 volume start $V0
-
-# Save port for 2nd brick
-BPORT_ORIG=$(get_brick_port $V0 $H2:$B2/$V0)
-
-# Stop volume, stop 2nd glusterd, start volume, start 2nd glusterd
-TEST $CLI1 volume stop $V0
-TEST kill_glusterd 2
-
-TEST $CLI1 volume start $V0
-TEST start_glusterd 2
-EXPECT_WITHIN $PROBE_TIMEOUT 1 peer_count
-
-# Get new port and compare with old one
-EXPECT_WITHIN $PROCESS_UP_TIMEOUT $BPORT_ORIG get_brick_port $V0 $H2:$B2/$V0
-
-$CLI1 volume stop $V0
-
-cleanup
diff --git a/tests/features/ssl-ciphers.t b/tests/features/ssl-ciphers.t
index 9ee7fc6c16f..f5909f320ac 100644
--- a/tests/features/ssl-ciphers.t
+++ b/tests/features/ssl-ciphers.t
@@ -137,6 +137,7 @@ EXPECT "`pwd`/`dirname $0`/dh1024.pem" volume_option $V0 ssl.dh-param
 TEST $CLI volume stop $V0
 TEST $CLI volume start $V0
 EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" online_brick_count
+BRICK_PORT=`brick_port $V0`
 EXPECT "Y" openssl_connect -cipher EDH -connect $H0:$BRICK_PORT
 
 # Test the cipher-list option
@@ -145,6 +146,7 @@ EXPECT AES256-SHA volume_option $V0 ssl.cipher-list
 TEST $CLI volume stop $V0
 TEST $CLI volume start $V0
 EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" online_brick_count
+BRICK_PORT=`brick_port $V0`
 EXPECT "Y" openssl_connect -cipher AES256-SHA -connect $H0:$BRICK_PORT
 EXPECT "N" openssl_connect -cipher AES128-SHA -connect $H0:$BRICK_PORT
 
@@ -154,6 +156,7 @@ EXPECT EECDH:EDH:!TLSv1 volume_option $V0 ssl.cipher-list
 TEST $CLI volume stop $V0
 TEST $CLI volume start $V0
 EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" online_brick_count
+BRICK_PORT=`brick_port $V0`
 EXPECT "N" openssl_connect -cipher AES256-SHA -connect $H0:$BRICK_PORT
 EXPECT "Y" openssl_connect -cipher EECDH -connect $H0:$BRICK_PORT
 
@@ -162,6 +165,7 @@ EXPECT invalid volume_option $V0 ssl.ec-curve
 TEST $CLI volume stop $V0
 TEST $CLI volume start $V0
 EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" online_brick_count
+BRICK_PORT=`brick_port $V0`
 EXPECT "N" openssl_connect -cipher EECDH -connect $H0:$BRICK_PORT
 
 TEST $CLI volume set $V0 ssl.ec-curve secp521r1
@@ -169,6 +173,7 @@ EXPECT secp521r1 volume_option $V0 ssl.ec-curve
 TEST $CLI volume stop $V0
 TEST $CLI volume start $V0
 EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" online_brick_count
+BRICK_PORT=`brick_port $V0`
 EXPECT "Y" openssl_connect -cipher EECDH -connect $H0:$BRICK_PORT
 
 # test revocation