How to use hosts method in molecule

Best Python code snippet using molecule_python

inventory.py

Source:inventory.py

...73        self.ensure_required_groups(ROLES)74        if changed_hosts:75            changed_hosts = self.range2ips(changed_hosts)76            self.hosts = self.build_hostnames(changed_hosts)77            self.purge_invalid_hosts(self.hosts.keys(), PROTECTED_NAMES)78            self.set_all(self.hosts)79            self.set_k8s_cluster()80            etcd_hosts_count = 3 if len(self.hosts.keys()) >= 3 else 181            self.set_etcd(list(self.hosts.keys())[:etcd_hosts_count])82            if len(self.hosts) >= SCALE_THRESHOLD:83                self.set_kube_master(list(self.hosts.keys())[etcd_hosts_count:5])84            else:85                self.set_kube_master(list(self.hosts.keys())[:2])86            self.set_kube_node(self.hosts.keys())87            if len(self.hosts) >= SCALE_THRESHOLD:88                self.set_calico_rr(list(self.hosts.keys())[:etcd_hosts_count])89        else:  # Show help if no options90            self.show_help()91            sys.exit(0)92        self.write_config(self.config_file)93    def write_config(self, config_file):94        if config_file:95            with open(self.config_file, 'w') as f:96                yaml.dump(self.yaml_config, f)97        else:98            print("WARNING: Unable to save config. Make sure you set "99                  "CONFIG_FILE env var.")100    def debug(self, msg):101        if DEBUG:102            print("DEBUG: {0}".format(msg))103    def get_ip_from_opts(self, optstring):104        if 'ip' in optstring:105            return optstring['ip']106        else:107            raise ValueError("IP parameter not found in options")108    def ensure_required_groups(self, groups):109        for group in groups:110            if group == 'all':111                self.debug("Adding group {0}".format(group))112                if group not in self.yaml_config:113                    all_dict = OrderedDict([('hosts', OrderedDict({})),114                                            ('children', OrderedDict({}))])115                    self.yaml_config = {'all': all_dict}116            else:117                self.debug("Adding group {0}".format(group))118                if group not in self.yaml_config['all']['children']:119                    self.yaml_config['all']['children'][group] = {'hosts': {}}120    def get_host_id(self, host):121        '''Returns integer host ID (without padding) from a given hostname.'''122        try:123            short_hostname = host.split('.')[0]124            return int(re.findall("\\d+$", short_hostname)[-1])125        except IndexError:126            raise ValueError("Host name must end in an integer")127    def build_hostnames(self, changed_hosts):128        existing_hosts = OrderedDict()129        highest_host_id = 0130        try:131            for host in self.yaml_config['all']['hosts']:132                existing_hosts[host] = self.yaml_config['all']['hosts'][host]133                host_id = self.get_host_id(host)134                if host_id > highest_host_id:135                    highest_host_id = host_id136        except Exception:137            pass138        # FIXME(mattymo): Fix condition where delete then add reuses highest id139        next_host_id = highest_host_id + 1140        all_hosts = existing_hosts.copy()141        for host in changed_hosts:142            if host[0] == "-":143                realhost = host[1:]144                if self.exists_hostname(all_hosts, realhost):145                    self.debug("Marked {0} for deletion.".format(realhost))146                    all_hosts.pop(realhost)147                elif self.exists_ip(all_hosts, realhost):148                    self.debug("Marked {0} for deletion.".format(realhost))149                    self.delete_host_by_ip(all_hosts, realhost)150            elif host[0].isdigit():151                if ',' in host:152                    ip, access_ip = host.split(',')153                else:154                    ip = host155                    access_ip = host156                if self.exists_hostname(all_hosts, host):157                    self.debug("Skipping existing host {0}.".format(host))158                    continue159                elif self.exists_ip(all_hosts, ip):160                    self.debug("Skipping existing host {0}.".format(ip))161                    continue162                next_host = "{0}{1}".format(HOST_PREFIX, next_host_id)163                next_host_id += 1164                all_hosts[next_host] = {'ansible_host': access_ip,165                                        'ip': ip,166                                        'access_ip': access_ip}167            elif host[0].isalpha():168                raise Exception("Adding hosts by hostname is not supported.")169        return all_hosts170    def range2ips(self, hosts):171        reworked_hosts = []172        def ips(start_address, end_address):173            try:174                # Python 3.x175                start = int(ip_address(start_address))176                end   = int(ip_address(end_address))177            except:178                # Python 2.7179                start = int(ip_address(unicode(start_address)))180                end   = int(ip_address(unicode(end_address)))181            return [ip_address(ip).exploded for ip in range(start, end + 1)]182        for host in hosts:183            if '-' in host and not host.startswith('-'):184                start, end = host.strip().split('-')185                try:186                    reworked_hosts.extend(ips(start, end))187                except ValueError:188                    raise Exception("Range of ip_addresses isn't valid")189            else:190                reworked_hosts.append(host)191        return reworked_hosts192    def exists_hostname(self, existing_hosts, hostname):193        return hostname in existing_hosts.keys()194    def exists_ip(self, existing_hosts, ip):195        for host_opts in existing_hosts.values():196            if ip == self.get_ip_from_opts(host_opts):197                return True198        return False199    def delete_host_by_ip(self, existing_hosts, ip):200        for hostname, host_opts in existing_hosts.items():201            if ip == self.get_ip_from_opts(host_opts):202                del existing_hosts[hostname]203                return204        raise ValueError("Unable to find host by IP: {0}".format(ip))205    def purge_invalid_hosts(self, hostnames, protected_names=[]):206        for role in self.yaml_config['all']['children']:207            if role != 'k8s-cluster' and self.yaml_config['all']['children'][role]['hosts']:  # noqa208                all_hosts = self.yaml_config['all']['children'][role]['hosts'].copy()  # noqa209                for host in all_hosts.keys():210                    if host not in hostnames and host not in protected_names:211                        self.debug(212                            "Host {0} removed from role {1}".format(host, role))  # noqa213                        del self.yaml_config['all']['children'][role]['hosts'][host]  # noqa214        # purge from all215        if self.yaml_config['all']['hosts']:216            all_hosts = self.yaml_config['all']['hosts'].copy()217            for host in all_hosts.keys():218                if host not in hostnames and host not in protected_names:219                    self.debug("Host {0} removed from role all".format(host))...

test_inventory.py

Source:test_inventory.py

...172                       'ip': '10.90.0.3',173                       'access_ip': '10.90.0.3'})])174        self.assertRaisesRegexp(ValueError, "Unable to find host",175                                self.inv.delete_host_by_ip, existing_hosts, ip)176    def test_purge_invalid_hosts(self):177        proper_hostnames = ['node1', 'node2']178        bad_host = 'doesnotbelong2'179        existing_hosts = OrderedDict([180            ('node1', {'ansible_host': '10.90.0.2',181                       'ip': '10.90.0.2',182                       'access_ip': '10.90.0.2'}),183            ('node2', {'ansible_host': '10.90.0.3',184                       'ip': '10.90.0.3',185                       'access_ip': '10.90.0.3'}),186            ('doesnotbelong2', {'whateveropts=ilike'})])187        self.inv.yaml_config['all']['hosts'] = existing_hosts188        self.inv.purge_invalid_hosts(proper_hostnames)189        self.assertTrue(190            bad_host not in self.inv.yaml_config['all']['hosts'].keys())191    def test_add_host_to_group(self):192        group = 'etcd'193        host = 'node1'194        opts = {'ip': '10.90.0.2'}195        self.inv.add_host_to_group(group, host, opts)196        self.assertEqual(197            self.inv.yaml_config['all']['children'][group]['hosts'].get(host),198            None)199    def test_set_kube_master(self):200        group = 'kube-master'201        host = 'node1'202        self.inv.set_kube_master([host])...

state.py

Source:state.py

...176        logger.warning((177            'Use of `State.limit` is deprecated, '178            'please use normal `if` statements instead.'179        ))180        return self.hosts(hosts)181    @contextmanager182    def hosts(self, hosts):183        logger.warning((184            'Use of `State.hosts` is deprecated, '185            'please use normal `if` statements instead.'186        ))187        hosts = ensure_host_list(hosts, inventory=self.inventory)188        # Store the previous value189        old_limit_hosts = self.limit_hosts190        # Limit the new hosts to a subset of the old hosts if they existed191        if old_limit_hosts is not None:192            hosts = [193                host for host in hosts194                if host in old_limit_hosts195            ]196        # Set the new value197        self.limit_hosts = hosts198        logger.debug('Setting limit to hosts: {0}'.format(hosts))199        yield200        # Restore the old value201        self.limit_hosts = old_limit_hosts202        logger.debug('Reset limit to hosts: {0}'.format(old_limit_hosts))203    @contextmanager204    def when(self, predicate):205        logger.warning((206            'Use of `State.when` is deprecated, '207            'please use normal `if` statements instead.'208        ))209        # Truth-y? Just yield/end, nothing happens here!210        if predicate:211            yield212            return213        # Otherwise limit any operations within to match no hosts214        with self.hosts([]):215            yield216    @contextmanager217    def deploy(self, name, kwargs, data, line_number, in_deploy=True):218        '''219        Wraps a group of operations as a deploy, this should not be used220        directly, instead use ``pyinfra.api.deploy.deploy``.221        '''222        # Handle nested deploy names223        if self.deploy_name:224            name = _make_name(self.deploy_name, name)225        # Store the previous values226        old_in_deploy = self.in_deploy227        old_deploy_name = self.deploy_name228        old_deploy_kwargs = self.deploy_kwargs229        old_deploy_data = self.deploy_data230        old_deploy_line_numbers = self.deploy_line_numbers231        self.in_deploy = in_deploy232        # Limit the new hosts to a subset of the old hosts if they existed233        if (234            old_deploy_kwargs235            and old_deploy_kwargs.get('hosts') is not None236        ):237            # If we have hosts - subset them based on the old hosts238            if 'hosts' in kwargs:239                kwargs['hosts'] = [240                    host for host in kwargs['hosts']241                    if host in old_deploy_kwargs['hosts']242                ]243            # Otherwise simply carry the previous hosts244            else:245                kwargs['hosts'] = old_deploy_kwargs['hosts']246        # Make new line numbers - note convert from and back to tuple to avoid247        # keeping deploy_line_numbers mutable.248        new_line_numbers = list(self.deploy_line_numbers or [])249        new_line_numbers.append(line_number)250        new_line_numbers = tuple(new_line_numbers)251        # Set the new values252        self.deploy_name = name253        self.deploy_kwargs = kwargs254        self.deploy_data = data255        self.deploy_line_numbers = new_line_numbers256        logger.debug('Starting deploy {0} (args={1}, data={2})'.format(257            name, kwargs, data,258        ))259        yield260        # Restore the previous values261        self.in_deploy = old_in_deploy262        self.deploy_name = old_deploy_name263        self.deploy_kwargs = old_deploy_kwargs264        self.deploy_data = old_deploy_data265        self.deploy_line_numbers = old_deploy_line_numbers266        logger.debug('Reset deploy to {0} (args={1}, data={2})'.format(267            old_deploy_name, old_deploy_kwargs, old_deploy_data,268        ))269    @contextmanager270    def preserve_loop_order(self, items):271        frameinfo = get_caller_frameinfo(frame_offset=1)  # escape contextlib272        self.loop_line = frameinfo.lineno273        def item_generator():274            for i, item in enumerate(items, 1):275                self.loop_counter = i276                yield item277        yield item_generator278        self.loop_counter = None279        self.loop_line = None280    def get_op_order(self):281        line_numbers_to_hash = self.op_line_numbers_to_hash282        sorted_line_numbers = sorted(list(line_numbers_to_hash.keys()))283        return [284            line_numbers_to_hash[numbers]285            for numbers in sorted_line_numbers286        ]287    def activate_host(self, host):288        '''289        Flag a host as active.290        '''291        logger.debug('Activating host: {0}'.format(host))292        # Add to *both* activated and active - active will reduce as hosts fail293        # but connected will not, enabling us to track failed %.294        self.activated_hosts.add(host)295        self.active_hosts.add(host)296    # def ready_host(self, host):297    #     '''298    #     Flag a host as ready, after which facts will not be gathered for it.299    #     '''300    #     logger.debug('Readying host: {0}'.format(host))301    #     self.ready_hosts.add(host)302    def fail_hosts(self, hosts_to_fail, activated_count=None):303        '''304        Flag a ``set`` of hosts as failed, error for ``config.FAIL_PERCENT``.305        '''306        if not hosts_to_fail:307            return308        activated_count = activated_count or len(self.activated_hosts)309        logger.debug('Failing hosts: {0}'.format(', '.join(310            (host.name for host in hosts_to_fail),311        )))312        self.failed_hosts.update(hosts_to_fail)313        self.active_hosts -= hosts_to_fail314        # Check we're not above the fail percent315        active_hosts = self.active_hosts316        # No hosts left!...

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