qa/tasks/cephfs/mount: use 'ip r' instead 'route'

Some linux host may not have 'route' installed. So, maybe,
prefer 'ip r' to find out which default gateway is configured.

Addresses error if there is no net-tools installed on ubuntu
remote hosts:
  route: command not found

Signed-off-by: Kyr Shatskyy <kyrylo.shatskyy@clyso.com>
(cherry picked from commit 46d7dd9952fa89497f9d781a24327b7e80954ca7)

diff --git a/qa/tasks/cephfs/mount.py b/qa/tasks/cephfs/mount.py
index 0060e7af2bf2a4f15adb605cf15551ebd2b4fbbe..c00ded82b56ae4f6e37116dc4ce02983aa76e0ef 100644 (file)
--- a/qa/tasks/cephfs/mount.py
+++ b/qa/tasks/cephfs/mount.py
@@ -296,12 +296,11 @@ class CephFSMountBase(object):
         self.client_remote.run(args=args, timeout=(5*60), omit_sudo=False)
         
         # Setup the NAT
-        p = self.client_remote.run(args=['route'], stderr=StringIO(),
-                                   stdout=StringIO(), timeout=(5*60))
-        p = re.findall(r'default .*', p.stdout.getvalue())
-        if p == False:
+        routes = self.client_remote.sh('ip r', timeout=(5*60))
+        defaults = re.findall(r'^default .*', routes)
+        if defaults == False:
             raise RuntimeError("No default gw found")
-        gw = p[0].split()[7]
+        gw = defaults[0].split()[4]
 
         self.run_shell_payload(f"""
             set -e
@@ -441,12 +440,12 @@ class CephFSMountBase(object):
         ip = IP(self.ceph_brx_net)[-2]
         mask = self.ceph_brx_net.split('/')[1]
 
-        p = self.client_remote.run(args=['route'], stderr=StringIO(),
-                                   stdout=StringIO(), timeout=(5*60))
-        p = re.findall(r'default .*', p.stdout.getvalue())
-        if p == False:
+        routes = self.client_remote.sh('ip r', timeout=(5*60))
+        defaults = re.findall(r'^default .*', routes)
+        if defaults == False:
             raise RuntimeError("No default gw found")
-        gw = p[0].split()[7]
+        gw = defaults[0].split()[4]
+
         self.run_shell_payload(f"""
             set -e
             sudo iptables -D FORWARD -o {gw} -i ceph-brx -j ACCEPT