{"action":"created","issue":{"url":"https://api.github.com/repos/debops/debops/issues/105","labels_url":"https://api.github.com/repos/debops/debops/issues/105/labels{/name}","comments_url":"https://api.github.com/repos/debops/debops/issues/105/comments","events_url":"https://api.github.com/repos/debops/debops/issues/105/events","html_url":"https://github.com/debops/debops/issues/105","id":67408956,"number":105,"title":"running common tasks on a node denied other hosts to login on the server","user":{"login":"0vermind","id":214675,"avatar_url":"https://avatars.githubusercontent.com/u/214675?v=3","gravatar_id":"","url":"https://api.github.com/users/0vermind","html_url":"https://github.com/0vermind","followers_url":"https://api.github.com/users/0vermind/followers","following_url":"https://api.github.com/users/0vermind/following{/other_user}","gists_url":"https://api.github.com/users/0vermind/gists{/gist_id}","starred_url":"https://api.github.com/users/0vermind/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/0vermind/subscriptions","organizations_url":"https://api.github.com/users/0vermind/orgs","repos_url":"https://api.github.com/users/0vermind/repos","events_url":"https://api.github.com/users/0vermind/events{/privacy}","received_events_url":"https://api.github.com/users/0vermind/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-04-09T17:17:48Z","updated_at":"2015-04-10T23:25:23Z","closed_at":null,"body":"I ran debops on a test server and finally finished all task with no errors, but my colleagues where suddenly denied to access the server.\r\nI like the harding debops made, and make sense to allow only controllers host to log as root but  how I can re-enable access to my colleagues without having them to run debops on their machine as controllers. They are still afraid about it."},"comment":{"url":"https://api.github.com/repos/debops/debops/issues/comments/91715188","html_url":"https://github.com/debops/debops/issues/105#issuecomment-91715188","issue_url":"https://api.github.com/repos/debops/debops/issues/105","id":91715188,"user":{"login":"drybjed","id":1043958,"avatar_url":"https://avatars.githubusercontent.com/u/1043958?v=3","gravatar_id":"","url":"https://api.github.com/users/drybjed","html_url":"https://github.com/drybjed","followers_url":"https://api.github.com/users/drybjed/followers","following_url":"https://api.github.com/users/drybjed/following{/other_user}","gists_url":"https://api.github.com/users/drybjed/gists{/gist_id}","starred_url":"https://api.github.com/users/drybjed/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/drybjed/subscriptions","organizations_url":"https://api.github.com/users/drybjed/orgs","repos_url":"https://api.github.com/users/drybjed/repos","events_url":"https://api.github.com/users/drybjed/events{/privacy}","received_events_url":"https://api.github.com/users/drybjed/received_events","type":"User","site_admin":false},"created_at":"2015-04-10T23:25:23Z","updated_at":"2015-04-10T23:25:23Z","body":"First, read this section: http://docs.ansible.com/intro_inventory.html#splitting-out-host-and-group-specific-data\r\n\r\nIn short, when we talk about Ansible inventory, we can see it as two things:\r\n\r\n- `inventory/hosts` file, which is an INI file and defines list of hosts and groups that are active in this particular inventory;\r\n\r\n- `inventory/{group,host}_vars/` directories, which contain subdirectories, which in turn contain YAML files which have variables specified in them;\r\n\r\nWhat you want to do, is to forget that you can set variables in the main INI file (the `inventory/hosts` file). Yes, you can set there stuff like `ansible_ssh_{host,user,authorized_key,port}` and perhaps some other *simple* variables, but for most of the variables that you can use in DebOps, which are ususally lists of elements, or dicts, or lists of dicts, the INI file is not sufficient. You want to define them in the YAML files instead.\r\n\r\nNow, what `inventory/group_vars/` and `inventory/host_vars/` directories give you, is a hierarchy. Ansible takes the whole inventory at once and flattenes the variables from it in one namespace, but it does so in a particular way. You can look at Ansible inventory as having at minimum three distinct levels:\r\n\r\n- all hosts: variables in `inventory/group_vars/all/`\r\n\r\n- hosts in a particular `[hostgroup]`: variables in `inventory/group_vars/hostgroup/`\r\n\r\n- specific hosts: variables in `inventory/host_vars/hostname/`\r\n\r\nThe more specifc \"level\" you use to define a variable, the more narrower it's \"scope\" will be, which means that variables defined for a specific host will override group variables which will override global variables. On the other hand, if you don't specify a variable somewhere, a variable from a wider \"scope\" will be used instead - if you only specify variable for a group, it will be used only on hosts in that group.\r\n\r\nThis mechanism is used in DebOps in many roles. In particular, `debops.sshd` role allows you to specify a host whitelist on each \"level\" of inventory separately:\r\n\r\n- `sshd_whitelist` defined in `inventory/group_vars/all/sshd.yml` will let you define list of whitelisted IP addresses on all hosts in inventory;\r\n\r\n- `sshd_group_whitelist` defined in `inventory/group_vars/hostgroup/sshd.yml` will let you define list of whitelisted IP addresses for a particular host group;\r\n\r\n- `sshd_host_whitelist` defined in `inventory/host_vars/hostname/sshd.yml` will let you define list of whitelisted IP addresses for a particular host in inventory;\r\n\r\nSo, which one should you pick? I don't know - that depends entirely on a specific environment you are configuring. :-) You just need to remember that Ansible, and DebOps in particular can be configured to suit any set of hosts you have (well, almost).\r\n\r\nJust to clear some things from your example: `[debops_sshd]` group is not defined by default in DebOps playbooks - `sshd` role is run as a common role, which means that any host has it enabled by default. So you don't need to add a host to that particular role to configure it. However, you can for example define `[servers]` group. Put all your relevant host in this group, in `inventory/hosts`:\r\n\r\n```\r\n# inventory/hosts\r\n[servers]\r\nhost1\r\nhost2\r\nhost3\r\n```\r\n\r\nThen, create a file for `sshd` variables for this particular group and define your whitelist there:\r\n\r\n```\r\n---\r\n# inventory/group_vars/servers/sshd.yml\r\n\r\nsshd_group_whitelist: [ '1.2.3.4' ]\r\n```\r\n\r\nAfter that, you can run the `sshd` role on this group of hosts:\r\n\r\n```\r\ndebops -l servers -t sshd\r\n```\r\n\r\nAnd they will be configured to allow access to SSH from `1.2.3.4` IP address (you can use CIDR subnets as well)."}}