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277 lines
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277 lines
9.8 KiB
ReStructuredText
=================
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Installing Chef
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=================
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Chef defines three types of entities:
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#. **Chef Nodes:** Run ``chef-client``, which installs and manages software.
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#. **Chef Server:** Interacts with ``chef-client`` on Chef nodes.
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#. **Chef Workstation:** Manages the Chef server.
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.. image:: ../images/chef.png
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See `Chef Architecture Introduction`_ for details.
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.. _createuser:
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Create a ``chef`` User
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----------------------
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The ``chef-client`` command requires the proper privileges to install and manage
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installations. On each Chef node, we recommend creating a ``chef`` user with
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full ``root`` privileges. For example::
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ssh user@chef-node
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sudo useradd -d /home/chef -m chef
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sudo passwd chef
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To provide full privileges, add the following to ``/etc/sudoers.d/chef``. ::
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echo "chef ALL = (root) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/chef
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sudo chmod 0440 /etc/sudoers.d/chef
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If you are using a version of ``sudo`` that doesn't support includes, you will
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need to add the following to the ``/etc/sudoers`` file::
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chef ALL = (root) NOPASSWD:ALL
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.. important:: Do not change the file permissions on ``/etc/sudoers``. Use a
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suitable tool such as ``visudo``.
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.. _genkeys:
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Generate SSH Keys for Chef Clients
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----------------------------------
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Chef's ``knife`` tool can run ``ssh``. To streamline deployments, we
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recommend generating an SSH key pair without a passphrase for your
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Chef nodes and copying the public key(s) to your Chef nodes so that you
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can connect to them from your workstation using ``ssh`` from ``knife``
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without having to provide a password. To generate a key pair without
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a passphrase, execute the following on your Chef workstation. ::
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ssh-keygen
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Generating public/private key pair.
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Enter file in which to save the key (/ceph-admin/.ssh/id_rsa):
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Enter passphrase (empty for no passphrase):
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Enter same passphrase again:
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Your identification has been saved in /ceph-admin/.ssh/id_rsa.
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Your public key has been saved in /ceph-admin/.ssh/id_rsa.pub.
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You may use RSA or DSA keys. Once you generate your keys, copy them to each
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OSD host. For example::
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ssh-copy-id chef@your-node
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Consider modifying your ``~/.ssh/config`` file so that it defaults to
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logging in as ``chef`` when no username is specified. ::
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Host myserver01
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Hostname myserver01.fqdn-or-ip-address.com
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User chef
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Host myserver02
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Hostname myserver02.fqdn-or-ip-address.com
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User chef
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.. _installruby:
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Installing Ruby
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---------------
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Chef requires you to install Ruby. Use the version applicable to your current
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Linux distribution and install Ruby on all of your hosts. ::
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sudo apt-get update
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sudo apt-get install ruby
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.. _installchefserver:
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Installing Chef and Chef Server on a Server
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-------------------------------------------
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If you plan on hosting your `Chef Server at Opscode`_ you may skip this step,
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but you must make a note of the the fully qualified domain name or IP address
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of your Chef Server for ``knife`` and ``chef-client``.
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First, add Opscode packages to your APT configuration. For example::
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sudo tee /etc/apt/sources.list.d/chef.list << EOF
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deb http://apt.opscode.com/ $(lsb_release -cs)-0.10 main
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deb-src http://apt.opscode.com/ $(lsb_release -cs)-0.10 main
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EOF
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Next, you must request keys so that APT can verify the packages. Copy
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and paste the following line into your command line::
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sudo touch /etc/apt/trusted.gpg.d/opscode-keyring.gpg && sudo gpg --fetch-key http://apt.opscode.com/packages@opscode.com.gpg.key && sudo gpg --export 83EF826A | sudo apt-key --keyring /etc/apt/trusted.gpg.d/opscode-keyring.gpg add - && sudo gpg --yes --delete-key 83EF826A
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The key is only used by ``apt``, so remove it from the ``root`` keyring by
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typing ``Y`` when prompted to delete it.
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Install the Opscode keyring, Chef and Chef server on the host designated
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as your Chef Server. ::
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sudo apt-get update && sudo apt-get upgrade && sudo apt-get install opscode-keyring chef chef-server
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Enter the fully qualified domain name or IP address for your Chef server. For example::
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http://fqdn-or-ip-address.com:4000
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The Chef server installer will prompt you to enter a temporary password. Enter
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a temporary password (*e.g.,* ``foo``) and proceed with the installation.
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.. tip:: When prompted for a temporary password, you may press **OK**.
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The installer wants you to re-enter the password to confirm it. To
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re-enter the password, you must press the **ESC** key.
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Once the installer finishes and activates the Chef server, you may enter the
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fully qualified domain name or IP address in a browser to launch the
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Chef web UI. For example::
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http://fqdn-or-ip-address.com:4000
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The Chef web UI will prompt you to enter the username and password.
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- **login:** ``admin``
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- **password:** ``foo``
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Once you have entered the temporary password, the Chef web UI will prompt you
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to enter a new password.
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.. _installchef:
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Install Chef on all Remaining Hosts
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-----------------------------------
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Install Chef on all Chef Nodes and on the Chef Workstation (if it is not the
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same host as the Chef Server). See `Installing Chef Client on Ubuntu or Debian`_
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for details.
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First, add Opscode packages to your APT configuration. For example::
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sudo tee /etc/apt/sources.list.d/chef.list << EOF
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deb http://apt.opscode.com/ $(lsb_release -cs)-0.10 main
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deb-src http://apt.opscode.com/ $(lsb_release -cs)-0.10 main
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EOF
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Next, you must request keys so that APT can verify the packages. Copy
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and paste the following line into your command line::
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sudo touch /etc/apt/trusted.gpg.d/opscode-keyring.gpg && sudo gpg --fetch-key http://apt.opscode.com/packages@opscode.com.gpg.key && sudo gpg --export 83EF826A | sudo apt-key --keyring /etc/apt/trusted.gpg.d/opscode-keyring.gpg add - && sudo gpg --yes --delete-key 83EF826A
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The key is only used by ``apt``, so remove it from the ``root`` keyring by
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typing ``Y`` when prompted to delete it.
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Install the Opscode keyring and Chef on all hosts other than the Chef Server. ::
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sudo apt-get update && sudo apt-get upgrade && sudo apt-get install opscode-keyring chef
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Enter the fully qualified domain name or IP address for your Chef server.
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For example::
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http://fqdn-or-ip-address.com:4000
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.. _configknife:
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Configuring Knife
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-----------------
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Once you complete the Chef server installation, install ``knife`` on the your
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Chef Workstation. If the Chef server is a remote host, use ``ssh`` to connect. ::
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ssh chef@fqdn-or-ip-address.com
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In the ``/home/chef`` directory, create a hidden Chef directory. ::
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mkdir -p ~/.chef
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The server generates validation and web UI certificates with read/write
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permissions for the user that installed the Chef server. Copy them from the
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``/etc/chef`` directory to the ``~/.chef`` directory. Then, change their
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ownership to the current user. ::
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sudo cp /etc/chef/validation.pem /etc/chef/webui.pem ~/.chef && sudo chown $(id -u):$(id -g) ~/.chef/*.pem
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From the current user's home directory, configure ``knife`` with an initial
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API client. ::
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knife configure -i
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The configuration will prompt you for inputs. Answer accordingly:
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*Where should I put the config file? [~/.chef/knife.rb]* Press **Enter**
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to accept the default value.
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*Please enter the chef server URL:* If you are installing the
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client on the same host as the server, enter ``http://localhost:4000``.
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Otherwise, enter an appropriate URL for the server.
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*Please enter a clientname for the new client:* Press **Enter**
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to accept the default value.
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*Please enter the existing admin clientname:* Press **Enter**
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to accept the default value.
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*Please enter the location of the existing admin client's private key:*
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Override the default value so that it points to the ``.chef`` directory.
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(*e.g.,* ``/home/chef/.chef/webui.pem``)
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*Please enter the validation clientname:* Press **Enter** to accept
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the default value.
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*Please enter the location of the validation key:* Override the
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default value so that it points to the ``.chef`` directory.
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(*e.g.,* ``/home/chef/.chef/validation.pem``)
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*Please enter the path to a chef repository (or leave blank):*
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Leave the entry field blank and press **Enter**.
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.. _addcbpath:
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Add a Cookbook Path
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-------------------
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Add ``cookbook_path`` to the ``~/.chef/knife.rb`` configuration file
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on your Chef workstation. For example::
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cookbook_path '/home/{user-name}/chef-cookbooks/'
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Then create the path if it doesn't already exist. ::
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mkdir /home/{user-name}/chef-cookbooks
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This is where you will store local copies of cookbooks before uploading
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them to the Chef server.
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.. _cpvalpem:
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Copy ``validation.pem`` to Nodes
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--------------------------------
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Copy the ``/etc/chef/validation.pem`` file from your Chef server to
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each Chef Node. In a command line shell on the Chef Server, for each node,
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replace ``{nodename}`` in the following line with the node's host name and
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execute it. ::
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sudo cat /etc/chef/validation.pem | ssh {nodename} "exec sudo tee /etc/chef/validation.pem >/dev/null"
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.. _runchefcli:
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Run ``chef-client`` on each Chef Node
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-------------------------------------
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Run the ``chef-client`` on each Chef Node so that the nodes
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register with the Chef server. ::
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ssh chef-node
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sudo chef-client
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.. _verifynodes:
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Verify Nodes
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------------
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Verify that you have setup all the hosts you want to use as
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Chef nodes. ::
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knife node list
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A list of the nodes you've configured should appear.
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See the `Deploy With Chef <../../config-cluster/chef>`_ section for information
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on using Chef to deploy your Ceph cluster.
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.. _Chef Architecture Introduction: http://wiki.opscode.com/display/chef/Architecture+Introduction
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.. _Chef Server at Opscode: http://www.opscode.com/hosted-chef/
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.. _Installing Chef Client on Ubuntu or Debian: http://wiki.opscode.com/display/chef/Installing+Chef+Client+on+Ubuntu+or+Debian
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.. _Installing Chef Server on Debian or Ubuntu using Packages: http://wiki.opscode.com/display/chef/Installing+Chef+Server+on+Debian+or+Ubuntu+using+Packages
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.. _Knife Bootstrap: http://wiki.opscode.com/display/chef/Knife+Bootstrap |