refactor useful legacy code about preparing test enviroment

- move useful scripts to qtip/scripts
- refactor some functions which belong to env_setup.py and
add them to qtip/runner/env.py

Change-Id: Ibf6c27103dfc45016920f4b602cd72d703c1f636
Signed-off-by: wu.zhihui <wu.zhihui1@zte.com.cn>

3 files changed, 138 insertions, 1 deletions

diff --git a/legacy/scripts/fetch_compute_ips.sh b/qtip/scripts/fetch_compute_ips.sh
index 4bdc9a48..a2618ec9 100755
--- a/legacy/scripts/fetch_compute_ips.sh
+++ b/qtip/scripts/fetch_compute_ips.sh
@@ -2,7 +2,6 @@
 ##############################################################################
 #Copyright (c) 2016 Ericsson AB, ZTE and others.
 #jose.lausuch@ericsson.com
-#wu.zhihui1@zte.com.cn
 #All rights reserved. This program and the accompanying materials
 #are made available under the terms of the Apache License, Version 2.0
 #which accompanies this distribution, and is available at
@@ -109,6 +108,7 @@ if [ -z "$IPS" ]; then
    error "The compute node $IPS are not up. Please check that the POD is correctly deployed."
 else
    echo "-------- all compute node ips: --------"
+   rm $HOME/ips.log
    touch $HOME/ips.log
    echo "$IPS" > $HOME/qtip/ips.log
    echo $IPS
diff --git a/legacy/scripts/qtip_creds.sh b/qtip/scripts/qtip_creds.sh
index af051ac5..af051ac5 100755
--- a/legacy/scripts/qtip_creds.sh
+++ b/qtip/scripts/qtip_creds.sh
diff --git a/qtip/util/env.py b/qtip/util/env.py
new file mode 100644
index 00000000..4e7a31c7
--- /dev/null
+++ b/qtip/util/env.py
@@ -0,0 +1,137 @@
+##############################################################################
+# Copyright (c) 2016 Dell Inc, ZTE and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+import os
+import paramiko
+import socket
+import time
+from os import path
+from os.path import expanduser
+
+SCRIPT_DIR = path.join(path.dirname(__file__), path.pardir, 'scripts')
+CONFIG_DIR = path.join(path.dirname(__file__), path.pardir, path.pardir,
+                       'config')
+PRIVATE_KEY = CONFIG_DIR + '/QtipKey'
+PUBLIC_KEY = CONFIG_DIR + '/QtipKey.pub'
+IPS_FILE = expanduser('~') + "/qtip/ips.log"
+HOST_FILE = CONFIG_DIR + "/host"
+
+
+def fetch_compute_ips_via_installer():
+    clean_file(IPS_FILE)
+
+    installer_type = str(os.environ['INSTALLER_TYPE'].lower())
+    installer_ip = str(os.environ['INSTALLER_IP'])
+    if installer_type not in ["fuel"]:
+        raise RuntimeError("%s is not supported" % installer_type)
+    if not installer_ip:
+        raise RuntimeError("undefine environment variable INSTALLER_IP")
+
+    cmd = "bash %s/fetch_compute_ips.sh -i %s -a %s" % \
+        (SCRIPT_DIR, installer_type, installer_ip)
+    os.system(cmd)
+    if path.isfile(IPS_FILE):
+        return True
+    else:
+        return False
+
+
+def parse_ips():
+    ip_list = []
+    with open(IPS_FILE, "r") as outfile:
+        data = outfile.read()
+        if data:
+            ip_list.extend(data.rstrip('\n').split('\n'))
+    return ip_list
+
+
+def ssh_test(ip):
+    os.system('ssh-keyscan %s >> /root/.ssh/known_hosts' % ip)
+    time.sleep(2)
+
+    ssh_cmd = '%s/qtip_creds.sh %s' % (SCRIPT_DIR, ip)
+    os.system(ssh_cmd)
+
+    ssh = paramiko.SSHClient()
+    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+    ssh.connect(ip, key_filename='{0}/QtipKey'.format(CONFIG_DIR))
+
+    for attempts in range(100):
+        try:
+            stdin, stdout, stderr = ssh.exec_command('uname')
+            if not stderr.readlines():
+                print("{0}: SSH test successful")
+                return True
+        except socket.error:
+            if attempts == 99:
+                return False
+            time.sleep(2)
+
+
+def ping_test(ip, attempts=30):
+    ping_cmd = 'ping -D -c1 {0}'.format(ip)
+    for i in range(attempts):
+        if os.system(ping_cmd):
+            print('\nWaiting for machine\n')
+            time.sleep(10)
+        else:
+            print('\n\n %s is UP \n\n ' % ip)
+            return True
+        if i == 29:
+            return False
+
+
+def check_nodes_connectivity():
+    ip_list = parse_ips()
+    for ip in ip_list:
+        if not ping_test(ip):
+            raise RuntimeError("{0}: Ping test failed".format(ip))
+        if not ssh_test(ip):
+            raise RuntimeError("{0}: SSH test failed".format(ip))
+
+
+def generate_host_file():
+    ip_list = parse_ips()
+    with open(HOST_FILE, 'w') as host_file:
+        for index, item in enumerate(ip_list):
+            host_file.write("[host_{0}]\n".format(index))
+            host_file.write(item + '\n')
+
+
+def generate_keypair():
+    """Generating ssh keypair"""
+    if not clean_keypair():
+        raise RuntimeError("Cann't remove old keypair")
+
+    cmd = "ssh-keygen -t rsa -N "" -f {0} -q".format(PRIVATE_KEY)
+    os.system(cmd)
+
+    if path.isfile(PRIVATE_KEY) and path.isfile(PUBLIC_KEY):
+        return True
+    else:
+        return False
+
+
+def clean_file(file_path):
+    try:
+        if path.isfile(file_path):
+            os.remove(file_path)
+            print("Removed: " + file_path)
+        else:
+            print("Not exists: " + file_path)
+    except OSError, error:
+        print("Not able to Remove: " + file_path, error)
+        return False
+    return True
+
+
+def clean_keypair():
+    flag = True
+    flag &= clean_file(PRIVATE_KEY)
+    flag &= clean_file(PUBLIC_KEY)
+    return flag