Initial applications isolation support using Linux namespaces.

test/unit/feature/isolation.py

@@ -0,0 +1,87 @@
+import os
+import json
+from unit.applications.proto import TestApplicationProto
+from unit.applications.lang.go import TestApplicationGo
+from unit.applications.lang.java import TestApplicationJava
+from unit.applications.lang.node import TestApplicationNode
+from unit.applications.lang.perl import TestApplicationPerl
+from unit.applications.lang.php import TestApplicationPHP
+from unit.applications.lang.python import TestApplicationPython
+from unit.applications.lang.ruby import TestApplicationRuby
+
+
+class TestFeatureIsolation(TestApplicationProto):
+    allns = ['pid', 'mnt', 'ipc', 'uts', 'cgroup', 'net']
+
+    def check(self, available, testdir):
+        test_conf = {"namespaces": {"credential": True}}
+
+        module = ''
+        app = 'empty'
+        if 'go' in available['modules']:
+            module = TestApplicationGo()
+
+        elif 'java' in available['modules']:
+            module = TestApplicationJava()
+
+        elif 'node' in available['modules']:
+            module = TestApplicationNode()
+            app = 'basic'
+
+        elif 'perl' in available['modules']:
+            module = TestApplicationPerl()
+            app = 'body_empty'
+
+        elif 'php' in available['modules']:
+            module = TestApplicationPHP()
+            app = 'phpinfo'
+
+        elif 'python' in available['modules']:
+            module = TestApplicationPython()
+
+        elif 'ruby' in available['modules']:
+            module = TestApplicationRuby()
+
+        if not module:
+            return
+
+        module.testdir = testdir
+        module.load(app)
+
+        resp = module.conf(test_conf, 'applications/' + app + '/isolation')
+        if 'success' not in resp:
+            return
+
+        userns = self.getns('user')
+        if not userns:
+            return
+
+        available['features']['isolation'] = {'user': userns}
+
+        unp_clone_path = '/proc/sys/kernel/unprivileged_userns_clone'
+        if os.path.exists(unp_clone_path):
+            with open(unp_clone_path, 'r') as f:
+                if str(f.read()).rstrip() == '1':
+                    available['features']['isolation'][
+                        'unprivileged_userns_clone'
+                    ] = True
+
+        for ns in self.allns:
+            ns_value = self.getns(ns)
+            if ns_value:
+                available['features']['isolation'][ns] = ns_value
+
+    def getns(self, nstype):
+        # read namespace id from symlink file:
+        # it points to: '<nstype>:[<ns id>]'
+        # # eg.: 'pid:[4026531836]'
+        nspath = '/proc/self/ns/' + nstype
+        data = None
+
+        if os.path.exists(nspath):
+            data = int(os.readlink(nspath)[len(nstype) + 2 : -1])
+
+        return data
+
+    def parsejson(self, data):
+        return json.loads(data.split('\n')[1])