geo-rep: IPv6 support

`address_family=inet6` needs to be added while mounting master and
slave volumes in gverify script.

New option introduced to gluster cli(`--inet6`) which will be used
internally by geo-rep while calling `gluster volume info
--remote-host=<ipv6>`.

Backport of https://review.gluster.org/22363

Fixes: bz#1695436
Change-Id: I1e0d42cae07158df043e64a2f991882d8c897837
Signed-off-by: Aravinda VK <avishwan@redhat.com>
(cherry picked from commit 240e1d6821fbb779c3dd73f6f0225d755a5b7cc6)

4 files changed, 38 insertions, 7 deletions

diff --git a/geo-replication/src/gverify.sh b/geo-replication/src/gverify.sh
index d048de0992b..7c88f9f682d 100755
--- a/geo-replication/src/gverify.sh
+++ b/geo-replication/src/gverify.sh
@@ -94,6 +94,7 @@ echo $cmd_line;
 function master_stats()
 {
     MASTERVOL=$1;
+    local inet6=$2;
     local d;
     local i;
     local disk_size;
@@ -102,7 +103,12 @@ function master_stats()
     local m_status;
 
     d=$(mktemp -d -t ${0##*/}.XXXXXX 2>/dev/null);
-    glusterfs -s localhost --xlator-option="*dht.lookup-unhashed=off" --volfile-id $MASTERVOL -l $master_log_file $d;
+    if [ "$inet6" = "inet6" ]; then
+        glusterfs -s localhost --xlator-option="*dht.lookup-unhashed=off" --xlator-option="transport.address-family=inet6" --volfile-id $MASTERVOL -l $master_log_file $d;
+    else
+        glusterfs -s localhost --xlator-option="*dht.lookup-unhashed=off" --volfile-id $MASTERVOL -l $master_log_file $d;
+    fi
+
     i=$(get_inode_num $d);
     if [[ "$i" -ne "1" ]]; then
         echo 0:0;
@@ -124,12 +130,18 @@ function slave_stats()
     SLAVEUSER=$1;
     SLAVEHOST=$2;
     SLAVEVOL=$3;
+    local inet6=$4;
     local cmd_line;
     local ver;
     local status;
 
     d=$(mktemp -d -t ${0##*/}.XXXXXX 2>/dev/null);
-    glusterfs --xlator-option="*dht.lookup-unhashed=off" --volfile-server $SLAVEHOST --volfile-id $SLAVEVOL -l $slave_log_file $d;
+    if [ "$inet6" = "inet6" ]; then
+        glusterfs --xlator-option="*dht.lookup-unhashed=off" --xlator-option="transport.address-family=inet6" --volfile-server $SLAVEHOST --volfile-id $SLAVEVOL -l $slave_log_file $d;
+    else
+        glusterfs --xlator-option="*dht.lookup-unhashed=off" --volfile-server $SLAVEHOST --volfile-id $SLAVEVOL -l $slave_log_file $d;
+    fi
+
     i=$(get_inode_num $d);
     if [[ "$i" -ne "1" ]]; then
         echo 0:0;
@@ -167,6 +179,8 @@ function main()
     log_file=$6
     > $log_file
 
+    inet6=$7
+
     # Use FORCE_BLOCKER flag in the error message to differentiate
     # between the errors which the force command should bypass
 
@@ -204,8 +218,8 @@ function main()
     fi;
 
     ERRORS=0;
-    master_data=$(master_stats $1);
-    slave_data=$(slave_stats $2 $3 $4);
+    master_data=$(master_stats $1 ${inet6});
+    slave_data=$(slave_stats $2 $3 $4 ${inet6});
     master_disk_size=$(echo $master_data | cut -f1 -d':');
     slave_disk_size=$(echo $slave_data | cut -f1 -d':');
     master_used_size=$(echo $master_data | cut -f2 -d':');
diff --git a/geo-replication/syncdaemon/argsupgrade.py b/geo-replication/syncdaemon/argsupgrade.py
index 4018143b8b4..7af40633ef8 100644
--- a/geo-replication/syncdaemon/argsupgrade.py
+++ b/geo-replication/syncdaemon/argsupgrade.py
@@ -84,6 +84,10 @@ def upgrade():
     # fail when it does stat to check the existence.
     init_gsyncd_template_conf()
 
+    inet6 = False
+    if "--inet6" in sys.argv:
+        inet6 = True
+
     if "--monitor" in sys.argv:
         # python gsyncd.py --path=/bricks/b1
         # --monitor -c gsyncd.conf
@@ -147,8 +151,11 @@ def upgrade():
 
             user, hname = remote_addr.split("@")
 
+            if not inet6:
+                hname = gethostbyname(hname)
+
             print(("ssh://%s@%s:gluster://127.0.0.1:%s" % (
-                user, gethostbyname(hname), vol)))
+                user, hname, vol)))
 
         sys.exit(0)
     elif "--normalize-url" in sys.argv:
@@ -346,3 +353,7 @@ def upgrade():
 
         if pargs.reset_sync_time:
             sys.argv.append("--reset-sync-time")
+
+    if inet6:
+        # Add `--inet6` as first argument
+        sys.argv = [sys.argv[0], "--inet6"] + sys.argv[1:]
diff --git a/geo-replication/syncdaemon/gsyncd.py b/geo-replication/syncdaemon/gsyncd.py
index 037f351151b..effe0ce6aa2 100644
--- a/geo-replication/syncdaemon/gsyncd.py
+++ b/geo-replication/syncdaemon/gsyncd.py
@@ -47,6 +47,7 @@ def main():
         sys.exit(0)
 
     parser = ArgumentParser()
+    parser.add_argument("--inet6", action="store_true")
     sp = parser.add_subparsers(dest="subcmd")
 
     # Monitor Status File update
diff --git a/geo-replication/syncdaemon/subcmds.py b/geo-replication/syncdaemon/subcmds.py
index 30050ec4743..4ece7e06b89 100644
--- a/geo-replication/syncdaemon/subcmds.py
+++ b/geo-replication/syncdaemon/subcmds.py
@@ -110,8 +110,13 @@ def subcmd_voluuidget(args):
 
     ParseError = XET.ParseError if hasattr(XET, 'ParseError') else SyntaxError
 
-    po = Popen(['gluster', '--xml', '--remote-host=' + args.host,
-                'volume', 'info', args.volname], bufsize=0,
+    cmd = ['gluster', '--xml', '--remote-host=' + args.host,
+           'volume', 'info', args.volname]
+
+    if args.inet6:
+        cmd.append("--inet6")
+
+    po = Popen(cmd, bufsize=0,
                stdin=None, stdout=PIPE, stderr=PIPE,
                universal_newlines=True)