Add ec2_os actions, enable os level burn_cpu,network,kill process function via aws ssm

Signed-off-by: Liu, Xiaopeng (133) <xiaopeng.liu@daimler.com>

Author: Liu, Xiaopeng (133)

MANIFEST.in

@@ -3,4 +3,5 @@ include requirements.txt
 include requirements-dev.txt
 include LICENSE
 include CHANGELOG.md
-include pytest.ini
+include pytest.ini
+include chaosaws/ec2_os/scripts/*

chaosaws/__init__.py

@@ -239,5 +239,7 @@ def load_exported_activities() -> List[DiscoveredActivities]:
     activities.extend(discover_actions("chaosaws.rds.actions"))
     activities.extend(discover_probes("chaosaws.rds.probes"))
     activities.extend(discover_actions("chaosaws.elasticache.actions"))
+    activities.extend(discover_actions("chaosaws.ec2_os.actions"))
+    activities.extend(discover_probes("chaosaws.ec2_os.probes"))
 
     return activities

chaosaws/ec2_os/__init__.py

@@ -0,0 +1,57 @@
+import os
+
+from logzero import logger
+from chaoslib.exceptions import FailedActivity
+
+from .constants import OS_WINDOWS, OS_LINUX
+
+
+def construct_script_content(action: str = None,
+                             os_type: str = None,
+                             parameters: dict = None):
+    """
+    As for now, no Windows action supported except burn CPU
+
+    :param action:
+    :param os_type: { OS_LINUX | OS_WINDOWS }
+    :param parameters:
+    :return:
+    """
+
+    cmd_param = ""
+    if os_type == OS_LINUX:
+        file_suffix = ".sh"
+        p_delimiter = ""
+        cmdline_delimiter = " && "
+    elif os_type == OS_WINDOWS:
+        file_suffix = ".ps1"
+        p_delimiter = "$"
+        cmdline_delimiter = "\n"
+    else:
+        raise FailedActivity(
+            "Cannot find corresponding script for {} on OS: {}".format(
+                action, os_type))
+
+    if action == "run_cmd":
+        cmdline_param = cmdline_delimiter.join(parameters['cmd'])
+        # parameters.pop('cmd')
+        del parameters['cmd']
+    else:
+        cmdline_param = ""
+
+    if parameters is not None:
+        param_list = list()
+        for k, v in parameters.items():
+            param_list.append('='.join([p_delimiter + k, "'" + v + "'"]))
+        cmd_param = '\n'.join(param_list)
+    else:
+        logger.info("No parameter parsed, return default script content")
+
+    script_name = action + file_suffix
+
+    with open(os.path.join(os.path.dirname(__file__),
+                           "scripts", script_name)) as file:
+        script_content = file.read()
+    # merge duration
+    script_content = cmd_param + "\n" + cmdline_param + "\n" + script_content
+    return script_content