{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Ansible\n",
    "\n",
    "Ansible is a configuration management software.\n",
    "\n",
    "Connects via ssh or docker to a list of inventory machines and executes a series of tasks eventually grouped in playbooks.\n",
    "\n",
    "At first, create an inventory file with all your hosts."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "/notebooks/notebooks/ansible\n"
     ]
    }
   ],
   "source": [
    "cd ansible\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "#\r\n",
      "# This inventory file contains a list of server to \r\n",
      "#  play with - divided in groups.\r\n",
      "#\r\n",
      "[course]\r\n",
      "# this is the local machine where you run jupyter\r\n",
      "# the tutorial just works with this one.\r\n",
      "pythonforsysadmin_course_1  ansible_connection=local\r\n",
      "\r\n",
      "\r\n",
      "# Another group of servers\r\n",
      "# where we can pass optional arguments\r\n",
      "# Homework: you can play with this group of host\r\n",
      "#  once you exchange ssh-keys between the pythonforsysadmin_course_1\r\n",
      "#  container and the pythonforsysadmin_ansible_* ones._\r\n",
      "[ansible]\r\n",
      "172.17.0.[5:7]   \r\n",
      "\r\n"
     ]
    }
   ],
   "source": [
    "cat inventory"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Now check if you can ping the local host."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\u001b[0;32mpythonforsysadmin_course_1 | SUCCESS => {\r\n",
      "    \"ansible_facts\": {\r\n",
      "        \"ansible_all_ipv4_addresses\": [\r\n",
      "            \"172.17.0.3\"\r\n",
      "        ], \r\n",
      "        \"ansible_all_ipv6_addresses\": [\r\n",
      "            \"fe80::42:acff:fe11:3\"\r\n",
      "        ], \r\n",
      "        \"ansible_architecture\": \"x86_64\", \r\n",
      "        \"ansible_bios_date\": \"06/30/2014\", \r\n",
      "        \"ansible_bios_version\": \"A00\", \r\n",
      "        \"ansible_cmdline\": {\r\n",
      "            \"BOOT_IMAGE\": \"/vmlinuz-4.9.17-100.fc24.x86_64\", \r\n",
      "            \"LANG\": \"it_IT.UTF-8\", \r\n",
      "            \"i8042.nopnp\": true, \r\n",
      "            \"rd.lvm.lv\": \"vg0/root00\", \r\n",
      "            \"ro\": true, \r\n",
      "            \"root\": \"/dev/mapper/vg0-root00\"\r\n",
      "        }, \r\n",
      "        \"ansible_date_time\": {\r\n",
      "            \"date\": \"2017-04-05\", \r\n",
      "            \"day\": \"05\", \r\n",
      "            \"epoch\": \"1491399416\", \r\n",
      "            \"hour\": \"13\", \r\n",
      "            \"iso8601\": \"2017-04-05T13:36:56Z\", \r\n",
      "            \"iso8601_basic\": \"20170405T133656277588\", \r\n",
      "            \"iso8601_basic_short\": \"20170405T133656\", \r\n",
      "            \"iso8601_micro\": \"2017-04-05T13:36:56.277679Z\", \r\n",
      "            \"minute\": \"36\", \r\n",
      "            \"month\": \"04\", \r\n",
      "            \"second\": \"56\", \r\n",
      "            \"time\": \"13:36:56\", \r\n",
      "            \"tz\": \"UTC\", \r\n",
      "            \"tz_offset\": \"+0000\", \r\n",
      "            \"weekday\": \"Wednesday\", \r\n",
      "            \"weekday_number\": \"3\", \r\n",
      "            \"weeknumber\": \"14\", \r\n",
      "            \"year\": \"2017\"\r\n",
      "        }, \r\n",
      "        \"ansible_default_ipv4\": {\r\n",
      "            \"address\": \"172.17.0.3\", \r\n",
      "            \"alias\": \"eth0\", \r\n",
      "            \"broadcast\": \"global\", \r\n",
      "            \"gateway\": \"172.17.0.1\", \r\n",
      "            \"interface\": \"eth0\", \r\n",
      "            \"macaddress\": \"02:42:ac:11:00:03\", \r\n",
      "            \"mtu\": 1500, \r\n",
      "            \"netmask\": \"255.255.0.0\", \r\n",
      "            \"network\": \"172.17.0.0\", \r\n",
      "            \"type\": \"ether\"\r\n",
      "        }, \r\n",
      "        \"ansible_default_ipv6\": {}, \r\n",
      "        \"ansible_devices\": {\r\n",
      "            \"sda\": {\r\n",
      "                \"holders\": [], \r\n",
      "                \"host\": \"\", \r\n",
      "                \"model\": \"ST500LM000-1EJ16\", \r\n",
      "                \"partitions\": {\r\n",
      "                    \"sda1\": {\r\n",
      "                        \"sectors\": \"1024000\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"500.00 MB\", \r\n",
      "                        \"start\": \"2048\"\r\n",
      "                    }, \r\n",
      "                    \"sda2\": {\r\n",
      "                        \"sectors\": \"81920\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"40.00 MB\", \r\n",
      "                        \"start\": \"1026048\"\r\n",
      "                    }, \r\n",
      "                    \"sda3\": {\r\n",
      "                        \"sectors\": \"262144\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"128.00 MB\", \r\n",
      "                        \"start\": \"1107968\"\r\n",
      "                    }, \r\n",
      "                    \"sda4\": {\r\n",
      "                        \"sectors\": \"1536000\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"750.00 MB\", \r\n",
      "                        \"start\": \"1370112\"\r\n",
      "                    }, \r\n",
      "                    \"sda5\": {\r\n",
      "                        \"sectors\": \"819200\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"400.00 MB\", \r\n",
      "                        \"start\": \"2906112\"\r\n",
      "                    }, \r\n",
      "                    \"sda6\": {\r\n",
      "                        \"sectors\": \"14827568\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"7.07 GB\", \r\n",
      "                        \"start\": \"961943552\"\r\n",
      "                    }, \r\n",
      "                    \"sda7\": {\r\n",
      "                        \"sectors\": \"1048576\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"512.00 MB\", \r\n",
      "                        \"start\": \"3725312\"\r\n",
      "                    }, \r\n",
      "                    \"sda8\": {\r\n",
      "                        \"sectors\": \"897589248\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"428.00 GB\", \r\n",
      "                        \"start\": \"4773888\"\r\n",
      "                    }, \r\n",
      "                    \"sda9\": {\r\n",
      "                        \"sectors\": \"8388608\", \r\n",
      "                        \"sectorsize\": 512, \r\n",
      "                        \"size\": \"4.00 GB\", \r\n",
      "                        \"start\": \"902363136\"\r\n",
      "                    }\r\n",
      "                }, \r\n",
      "                \"removable\": \"0\", \r\n",
      "                \"rotational\": \"1\", \r\n",
      "                \"sas_address\": null, \r\n",
      "                \"sas_device_handle\": null, \r\n",
      "                \"scheduler_mode\": \"cfq\", \r\n",
      "                \"sectors\": \"976773168\", \r\n",
      "                \"sectorsize\": \"512\", \r\n",
      "                \"size\": \"465.76 GB\", \r\n",
      "                \"support_discard\": \"0\", \r\n",
      "                \"vendor\": \"ATA\"\r\n",
      "            }\r\n",
      "        }, \r\n",
      "        \"ansible_distribution\": \"Debian\", \r\n",
      "        \"ansible_distribution_major_version\": \"8\", \r\n",
      "        \"ansible_distribution_release\": \"jessie\", \r\n",
      "        \"ansible_distribution_version\": \"8.5\", \r\n",
      "        \"ansible_dns\": {\r\n",
      "            \"nameservers\": [\r\n",
      "                \"10.0.11.254\", \r\n",
      "                \"#\", \r\n",
      "                \"removeme-babel-dns\", \r\n",
      "                \"10.0.11.254\", \r\n",
      "                \"#\", \r\n",
      "                \"removeme-babel-dns\", \r\n",
      "                \"10.0.11.254\", \r\n",
      "                \"#\", \r\n",
      "                \"removeme-babel-dns\", \r\n",
      "                \"10.0.11.254\", \r\n",
      "                \"10.0.252.5\"\r\n",
      "            ], \r\n",
      "            \"search\": [\r\n",
      "                \"babel.it\"\r\n",
      "            ]\r\n",
      "        }, \r\n",
      "        \"ansible_domain\": \"\", \r\n",
      "        \"ansible_env\": {\r\n",
      "            \"CLICOLOR\": \"1\", \r\n",
      "            \"GIT_PAGER\": \"cat\", \r\n",
      "            \"GPG_KEY\": \"C01E1CAD5EA2C4F0B8E3571504C367C218ADD4FF\", \r\n",
      "            \"HOME\": \"/root\", \r\n",
      "            \"HOSTNAME\": \"7ddd5bc0dd90\", \r\n",
      "            \"JPY_PARENT_PID\": \"6\", \r\n",
      "            \"LANG\": \"C.UTF-8\", \r\n",
      "            \"LC_ALL\": \"C.UTF-8\", \r\n",
      "            \"LC_MESSAGES\": \"C.UTF-8\", \r\n",
      "            \"PAGER\": \"cat\", \r\n",
      "            \"PATH\": \"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\", \r\n",
      "            \"PWD\": \"/notebooks/notebooks/ansible\", \r\n",
      "            \"PYTHONPATH\": \"\", \r\n",
      "            \"PYTHON_PIP_VERSION\": \"8.1.2\", \r\n",
      "            \"PYTHON_VERSION\": \"2.7.12\", \r\n",
      "            \"TERM\": \"xterm-color\"\r\n",
      "        }, \r\n",
      "        \"ansible_eth0\": {\r\n",
      "            \"active\": true, \r\n",
      "            \"device\": \"eth0\", \r\n",
      "            \"ipv4\": {\r\n",
      "                \"address\": \"172.17.0.3\", \r\n",
      "                \"broadcast\": \"global\", \r\n",
      "                \"netmask\": \"255.255.0.0\", \r\n",
      "                \"network\": \"172.17.0.0\"\r\n",
      "            }, \r\n",
      "            \"ipv6\": [\r\n",
      "                {\r\n",
      "                    \"address\": \"fe80::42:acff:fe11:3\", \r\n",
      "                    \"prefix\": \"64\", \r\n",
      "                    \"scope\": \"link\"\r\n",
      "                }\r\n",
      "            ], \r\n",
      "            \"macaddress\": \"02:42:ac:11:00:03\", \r\n",
      "            \"mtu\": 1500, \r\n",
      "            \"promisc\": false, \r\n",
      "            \"type\": \"ether\"\r\n",
      "        }, \r\n",
      "        \"ansible_fips\": false, \r\n",
      "        \"ansible_form_factor\": \"Portable\", \r\n",
      "        \"ansible_fqdn\": \"7ddd5bc0dd90\", \r\n",
      "        \"ansible_gather_subset\": [\r\n",
      "            \"hardware\", \r\n",
      "            \"network\", \r\n",
      "            \"virtual\"\r\n",
      "        ], \r\n",
      "        \"ansible_hostname\": \"7ddd5bc0dd90\", \r\n",
      "        \"ansible_interfaces\": [\r\n",
      "            \"lo\", \r\n",
      "            \"eth0\"\r\n",
      "        ], \r\n",
      "        \"ansible_kernel\": \"4.9.17-100.fc24.x86_64\", \r\n",
      "        \"ansible_lo\": {\r\n",
      "            \"active\": true, \r\n",
      "            \"device\": \"lo\", \r\n",
      "            \"ipv4\": {\r\n",
      "                \"address\": \"127.0.0.1\", \r\n",
      "                \"broadcast\": \"host\", \r\n",
      "                \"netmask\": \"255.0.0.0\", \r\n",
      "                \"network\": \"127.0.0.0\"\r\n",
      "            }, \r\n",
      "            \"ipv6\": [\r\n",
      "                {\r\n",
      "                    \"address\": \"::1\", \r\n",
      "                    \"prefix\": \"128\", \r\n",
      "                    \"scope\": \"host\"\r\n",
      "                }\r\n",
      "            ], \r\n",
      "            \"mtu\": 65536, \r\n",
      "            \"promisc\": false, \r\n",
      "            \"type\": \"loopback\"\r\n",
      "        }, \r\n",
      "        \"ansible_machine\": \"x86_64\", \r\n",
      "        \"ansible_machine_id\": \"748cfc5d0ac0444e85d1cccb08411403\", \r\n",
      "        \"ansible_memfree_mb\": 706, \r\n",
      "        \"ansible_memory_mb\": {\r\n",
      "            \"nocache\": {\r\n",
      "                \"free\": 3707, \r\n",
      "                \"used\": 4200\r\n",
      "            }, \r\n",
      "            \"real\": {\r\n",
      "                \"free\": 706, \r\n",
      "                \"total\": 7907, \r\n",
      "                \"used\": 7201\r\n",
      "            }, \r\n",
      "            \"swap\": {\r\n",
      "                \"cached\": 0, \r\n",
      "                \"free\": 4095, \r\n",
      "                \"total\": 4095, \r\n",
      "                \"used\": 0\r\n",
      "            }\r\n",
      "        }, \r\n",
      "        \"ansible_memtotal_mb\": 7907, \r\n",
      "        \"ansible_mounts\": [\r\n",
      "            {\r\n",
      "                \"device\": \"/dev/mapper/docker-253:2-537280731-c85cb1165b8c710d56b97bfa1bbd902f1dc2eed671a883f570d48a8ab23dc822\", \r\n",
      "                \"fstype\": \"xfs\", \r\n",
      "                \"mount\": \"/\", \r\n",
      "                \"options\": \"rw,context=\\\"system_u:object_r:svirt_sandbox_file_t:s0:c567,c688\\\",relatime,nouuid,attr2,inode64,logbsize=64k,sunit=128,swidth=128,noquota\", \r\n",
      "                \"size_available\": 105882546176, \r\n",
      "                \"size_total\": 107320705024, \r\n",
      "                \"uuid\": \"NA\"\r\n",
      "            }, \r\n",
      "            {\r\n",
      "                \"device\": \"/dev/mapper/vg0-home\", \r\n",
      "                \"fstype\": \"xfs\", \r\n",
      "                \"mount\": \"/notebooks\", \r\n",
      "                \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\", \r\n",
      "                \"size_available\": 21948248064, \r\n",
      "                \"size_total\": 214643507200, \r\n",
      "                \"uuid\": \"NA\"\r\n",
      "            }, \r\n",
      "            {\r\n",
      "                \"device\": \"/dev/mapper/vg0-data\", \r\n",
      "                \"fstype\": \"xfs\", \r\n",
      "                \"mount\": \"/etc/resolv.conf\", \r\n",
      "                \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\", \r\n",
      "                \"size_available\": 4040863744, \r\n",
      "                \"size_total\": 214643507200, \r\n",
      "                \"uuid\": \"NA\"\r\n",
      "            }, \r\n",
      "            {\r\n",
      "                \"device\": \"/dev/mapper/vg0-data\", \r\n",
      "                \"fstype\": \"xfs\", \r\n",
      "                \"mount\": \"/etc/hostname\", \r\n",
      "                \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\", \r\n",
      "                \"size_available\": 4040863744, \r\n",
      "                \"size_total\": 214643507200, \r\n",
      "                \"uuid\": \"NA\"\r\n",
      "            }, \r\n",
      "            {\r\n",
      "                \"device\": \"/dev/mapper/vg0-data\", \r\n",
      "                \"fstype\": \"xfs\", \r\n",
      "                \"mount\": \"/etc/hosts\", \r\n",
      "                \"options\": \"rw,seclabel,relatime,attr2,inode64,noquota\", \r\n",
      "                \"size_available\": 4040863744, \r\n",
      "                \"size_total\": 214643507200, \r\n",
      "                \"uuid\": \"NA\"\r\n",
      "            }\r\n",
      "        ], \r\n",
      "        \"ansible_nodename\": \"7ddd5bc0dd90\", \r\n",
      "        \"ansible_os_family\": \"Debian\", \r\n",
      "        \"ansible_pkg_mgr\": \"apt\", \r\n",
      "        \"ansible_processor\": [\r\n",
      "            \"GenuineIntel\", \r\n",
      "            \"Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz\", \r\n",
      "            \"GenuineIntel\", \r\n",
      "            \"Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz\", \r\n",
      "            \"GenuineIntel\", \r\n",
      "            \"Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz\", \r\n",
      "            \"GenuineIntel\", \r\n",
      "            \"Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz\"\r\n",
      "        ], \r\n",
      "        \"ansible_processor_cores\": 2, \r\n",
      "        \"ansible_processor_count\": 1, \r\n",
      "        \"ansible_processor_threads_per_core\": 2, \r\n",
      "        \"ansible_processor_vcpus\": 4, \r\n",
      "        \"ansible_product_name\": \"Inspiron 7347\", \r\n",
      "        \"ansible_product_serial\": \"54CK432\", \r\n",
      "        \"ansible_product_uuid\": \"4C4C4544-0034-4310-804B-B5C04F343332\", \r\n",
      "        \"ansible_product_version\": \"00h\", \r\n",
      "        \"ansible_python\": {\r\n",
      "            \"executable\": \"/usr/bin/python\", \r\n",
      "            \"has_sslcontext\": true, \r\n",
      "            \"type\": \"CPython\", \r\n",
      "            \"version\": {\r\n",
      "                \"major\": 2, \r\n",
      "                \"micro\": 9, \r\n",
      "                \"minor\": 7, \r\n",
      "                \"releaselevel\": \"final\", \r\n",
      "                \"serial\": 0\r\n",
      "            }, \r\n",
      "            \"version_info\": [\r\n",
      "                2, \r\n",
      "                7, \r\n",
      "                9, \r\n",
      "                \"final\", \r\n",
      "                0\r\n",
      "            ]\r\n",
      "        }, \r\n",
      "        \"ansible_python_version\": \"2.7.9\", \r\n",
      "        \"ansible_selinux\": false, \r\n",
      "        \"ansible_service_mgr\": \"upstart\", \r\n",
      "        \"ansible_swapfree_mb\": 4095, \r\n",
      "        \"ansible_swaptotal_mb\": 4095, \r\n",
      "        \"ansible_system\": \"Linux\", \r\n",
      "        \"ansible_system_capabilities\": [\r\n",
      "            \"cap_chown\", \r\n",
      "            \"cap_dac_override\", \r\n",
      "            \"cap_fowner\", \r\n",
      "            \"cap_fsetid\", \r\n",
      "            \"cap_kill\", \r\n",
      "            \"cap_setgid\", \r\n",
      "            \"cap_setuid\", \r\n",
      "            \"cap_setpcap\", \r\n",
      "            \"cap_net_bind_service\", \r\n",
      "            \"cap_net_raw\", \r\n",
      "            \"cap_sys_chroot\", \r\n",
      "            \"cap_mknod\", \r\n",
      "            \"cap_audit_write\", \r\n",
      "            \"cap_setfcap+eip\"\r\n",
      "        ], \r\n",
      "        \"ansible_system_capabilities_enforced\": \"True\", \r\n",
      "        \"ansible_system_vendor\": \"Dell Inc.\", \r\n",
      "        \"ansible_uptime_seconds\": 12220, \r\n",
      "        \"ansible_user_dir\": \"/root\", \r\n",
      "        \"ansible_user_gecos\": \"root\", \r\n",
      "        \"ansible_user_gid\": 0, \r\n",
      "        \"ansible_user_id\": \"root\", \r\n",
      "        \"ansible_user_shell\": \"/bin/bash\", \r\n",
      "        \"ansible_user_uid\": 0, \r\n",
      "        \"ansible_userspace_architecture\": \"x86_64\", \r\n",
      "        \"ansible_userspace_bits\": \"64\", \r\n",
      "        \"ansible_virtualization_role\": \"guest\", \r\n",
      "        \"ansible_virtualization_type\": \"docker\", \r\n",
      "        \"module_setup\": true\r\n",
      "    }, \r\n",
      "    \"changed\": false\r\n",
      "}\u001b[0m\r\n"
     ]
    }
   ],
   "source": [
    "# Check connections versus the local host in the \"course\" group\n",
    "\n",
    "!ansible -i inventory course  -msetup"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\u001b[0;32mpythonforsysadmin_course_1 | SUCCESS => {\n",
      "    \"changed\": false, \n",
      "    \"ping\": \"pong\"\n",
      "}\u001b[0m\n",
      "\u001b[1;31m172.17.0.5 | UNREACHABLE! => {\n",
      "    \"changed\": false, \n",
      "    \"msg\": \"Failed to connect to the host via ssh.\", \n",
      "    \"unreachable\": true\n",
      "}\u001b[0m\n",
      "\u001b[1;31m172.17.0.6 | UNREACHABLE! => {\n",
      "    \"changed\": false, \n",
      "    \"msg\": \"Failed to connect to the host via ssh.\", \n",
      "    \"unreachable\": true\n",
      "}\u001b[0m\n",
      "\u001b[1;31m172.17.0.7 | UNREACHABLE! => {\n",
      "    \"changed\": false, \n",
      "    \"msg\": \"Failed to connect to the host via ssh.\", \n",
      "    \"unreachable\": true\n",
      "}\u001b[0m\n"
     ]
    }
   ],
   "source": [
    "# Pinging all hosts gives some errors too, due to missing hosts or no ssh-key exchange\n",
    "!ansible -i inventory -m ping all"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Further on inventories"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " You can split your servers in many inventory files, like\n",
    "\n",
    " - staging\n",
    " \n",
    "```\n",
    "# staging inventory file\n",
    "# run with\n",
    "# ansible -i staging ...\n",
    " [ws]\n",
    " staging-ws-[0:3]\n",
    " \n",
    " [jboss]\n",
    " staging-boss-[0:6]\n",
    "```\n",
    " \n",
    " - production\n",
    " \n",
    "```\n",
    "# production inventory file\n",
    "# run with\n",
    "# ansible -i production ...\n",
    " [ws]\n",
    " ws-[0:3]\n",
    " \n",
    " [jboss]\n",
    " boss-[0:6]\n",
    "```\n",
    " \n",
    " "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Playbooks\n",
    "\n",
    "To run a group of tasks with ansible, just:\n",
    "\n",
    "  - create a playbook.yml\n",
    "  - run ansible-playbook -i inventory playbook.yml\n",
    "  \n",
    "\n",
    "A playbook is a list of tasks in yml format, something like\n",
    "\n",
    "```\n",
    "#\n",
    "# playbook.yml\n",
    "#\n",
    "- name: All public traffic is redirected via https\n",
    "  uri:\n",
    "    url: http://{{server_host}}/\n",
    "    validate_certs: false\n",
    "    follow_redirects: none\n",
    "    status_code: 301\n",
    "    \n",
    "- name: This webapp  is served\n",
    "  uri:\n",
    "    url: https://{{server_host}}/webapp-1\n",
    "    validate_certs: false\n",
    "    status_code: 200\n",
    "    HEADER_testflag: test\n",
    "\n",
    "- name: The WS is serverd and requires authentication\n",
    "  uri:\n",
    "    url: https://{{server_host}}/rest/v1/method\n",
    "    validate_certs: false\n",
    "    status_code: 401\n",
    "\n",
    "```\n",
    "\n",
    "In this case, instead of making actual installation|setup tasks, we just created a testsuite validating our deployment. Now we must write another playbook which takes care of deployng the actual machine.\n",
    "\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Testing our course environment\n",
    "\n",
    "We can write a playbook to test our course environment."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "# Run this with\r\n",
      "#\r\n",
      "#   #ansible-playbook -i inventory python-course-test.yml\r\n",
      "#\r\n",
      "- hosts: course\r\n",
      "  tasks:\r\n",
      "    - name: The /notebooks directory should exist\r\n",
      "      file: path=\"/notebooks\" state=directory\r\n",
      "\r\n",
      "    - name: jupyter is responding on 8888\r\n",
      "      uri:\r\n",
      "        url: http://0.0.0.0:8888/notebooks\r\n",
      "        validate_certs: false\r\n",
      "        status_code: 200  # modify this line to simulate an error and see the outcome!\r\n",
      "\r\n",
      "    - name: The template.conf is in place\r\n",
      "      file: path=\"/tmp/template.conf\" state=file\r\n"
     ]
    }
   ],
   "source": [
    "!cat python-course-test.yml"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "PLAY [course] ******************************************************************\n",
      "\n",
      "TASK [setup] *******************************************************************\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1]\u001b[0m\n",
      "\n",
      "TASK [The /notebooks directory should exist] ***********************************\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1]\u001b[0m\n",
      "\n",
      "TASK [jupyter is responding on 8888] *******************************************\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1]\u001b[0m\n",
      "\n",
      "TASK [The template.conf is in place] *******************************************\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1]\u001b[0m\n",
      "\n",
      "PLAY RECAP *********************************************************************\n",
      "\u001b[0;32mpythonforsysadmin_course_1\u001b[0m : \u001b[0;32mok\u001b[0m\u001b[0;32m=\u001b[0m\u001b[0;32m4\u001b[0m    changed=0    unreachable=0    failed=0   \n",
      "\n"
     ]
    }
   ],
   "source": [
    "!ansible-playbook -i inventory python-course-test.yml "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "As you can see something is missing: this playbook is not going to modify our machine but only test that everything is in place. \n",
    "\n",
    "See ```ansible-playbook --check ``` and ``` --diff ``` for further infos.\n",
    "\n",
    "We can run a setup playbook, conventionally named site.yml.\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "# Run this with\r\n",
      "#\r\n",
      "#   #ansible-playbook -i inventory site.yml\r\n",
      "#\r\n",
      "- hosts: course\r\n",
      "  tasks:\r\n",
      "    \r\n",
      "    - name: Create a file from a template\r\n",
      "      template: src=mytemplate.j2 dest=/tmp/template.conf\r\n",
      "\r\n",
      "    - name: Ensure needed packages are present and eventually install them\r\n",
      "      apt: name={{item}} state=present\r\n",
      "      with_items:\r\n",
      "        - python\r\n",
      "        - python-dev\r\n",
      "#      ignore_errors: yes  #  ignore errors during the course (eg. connectivity)\r\n",
      "\r\n",
      "\r\n"
     ]
    }
   ],
   "source": [
    "!cat site.yml"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "PLAY [course] ******************************************************************\n",
      "\n",
      "TASK [setup] *******************************************************************\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1]\u001b[0m\n",
      "\n",
      "TASK [Create a file from a template] *******************************************\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1]\u001b[0m\n",
      "\n",
      "TASK [Ensure needed packages are present and eventually install them] **********\n",
      "\u001b[0;32mok: [pythonforsysadmin_course_1] => (item=[u'python', u'python-dev'])\u001b[0m\n",
      "\n",
      "PLAY RECAP *********************************************************************\n",
      "\u001b[0;32mpythonforsysadmin_course_1\u001b[0m : \u001b[0;32mok\u001b[0m\u001b[0;32m=\u001b[0m\u001b[0;32m3\u001b[0m    changed=0    unreachable=0    failed=0   \n",
      "\n"
     ]
    }
   ],
   "source": [
    "!ansible-playbook -i inventory site.yml --diff --limit=course  # in this case the --limit does not change anything ;)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "#\r\n",
      "# A simple templated file for ansible.\r\n",
      "# See the documentation to use this flexible\r\n",
      "#  jinja template.\r\n",
      "\r\n",
      "GW=10.0.0.254\t\t\t# a static line\r\n",
      "HOSTNAME={{ansible_hostname}}   # a dynamic one\r\n",
      "\r\n",
      "\r\n"
     ]
    }
   ],
   "source": [
    "!cat mytemplate.j2\n",
    "\n"
   ]
  }
 ],
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