Piro / YUKI Hiroshi
null+****@clear*****
Tue Sep 23 18:03:42 JST 2014
Piro / YUKI Hiroshi 2014-09-23 18:03:42 +0900 (Tue, 23 Sep 2014) New Revision: 7c5f44d278d808fbdde1ce6b2f249a9645d6c409 https://github.com/droonga/droonga.org/commit/7c5f44d278d808fbdde1ce6b2f249a9645d6c409 Message: Totally rewrite instructions to set up a node Modified files: tutorial/1.0.6/groonga/index.md Modified: tutorial/1.0.6/groonga/index.md (+102 -49) =================================================================== --- tutorial/1.0.6/groonga/index.md 2014-09-23 03:34:21 +0900 (5b1fb9f) +++ tutorial/1.0.6/groonga/index.md 2014-09-23 18:03:42 +0900 (84ba50a) @@ -41,8 +41,9 @@ Following instructions are basically written for a successfully prepared virtual NOTE: * Make sure to use instances with >= 2GB memory equipped, at least during installation of required packages for Droonga. -Otherwise, you may experience a strange build error. + Otherwise, you may experience a strange build error. * Make sure the hostname reported by `hostname -f` or the IP address reported by `hostname -i` is correctly accessible from each other computer in your cluster. + For simplicity, You need to prepare two or more nodes for effective replication. So this tutorial assumes that you have two computers: @@ -56,89 +57,141 @@ Groonga provides binary packages and you can install Groonga easily, for some en (See: [how to install Groonga](http://groonga.org/docs/install.html)) On the other hand, there is installation scripts to set up a computer as a Droonga node. -Let's log in to the computer `node0` (`192.168.100.50`), download two scripts, and run them by `bash` as the root user, like: +Steps are: -~~~ -$ curl https://raw.githubusercontent.com/droonga/droonga-engine/master/install.sh | \ - sudo bash -$ curl https://raw.githubusercontent.com/droonga/droonga-http-server/master/install.sh | \ - sudo bash -~~~ + 1. Install the `droonga-engine` *on each computer*. + 2. Install the `droonga-http-server` *on each computer*. + 3. Configure *each computer* to work together with each other. + +Note that you must do all steps on each computer. +However, they're very simple. -If you are using a CentOS server, switch to the root before running, instead of using `sudo`, like: +Let's log in to the computer `node0` (`192.168.100.50`), and install Droonga components. + +First, install the `droonga-engine`. +It is the core component provides most features of Droonga system. +Download the installation script and run it by `bash` as the root user: ~~~ -$ su # curl https://raw.githubusercontent.com/droonga/droonga-engine/master/install.sh | \ bash +... +Installing droonga-engine from RubyGems... +... +Preparing the user... +... +Setting up the configuration directory... +This node is configured with a hostname XXXXXXXX. + +Registering droonga-engine as a service... +... +Successfully installed droonga-engine. +~~~ + +Note, The name of the node itself (guessed from the host name of the computer) appears in the message. +*It is used in various situations*, so *don't forget what is the name of each node*. + +Second, install the `droonga-http-server`. +It is the frontend component required to translate HTTP requests to Droonga's native one. +Download the installation script and run it by `bash` as the root user: + +~~~ # curl https://raw.githubusercontent.com/droonga/droonga-http-server/master/install.sh | \ bash +... +Installing droonga-http-server from npmjs.org... +... +Preparing the user... +... +Setting up the configuration directory... +The droonga-engine service is detected on this node. +The droonga-http-server is configured to be connected +to this node (XXXXXXXX). +This node is configured with a hostname XXXXXXXX. + +Registering droonga-http-server as a service... +... +Successfully installed droonga-http-server. ~~~ -If your computers cannot resolve IP addresse of each other by its host name, specify accessible IP address via environment variables, like: +OK, now two computers successfully prepared to work as Droonga nodes. + +If installation scripts didn't work as expected and you couldn't install them, see [the tutorial to install services without installation script](../manual-install/). + +### When your computers don't have a host name accessible from other computers... + +Each Droonga node must know the *accessible host name* of the node itself, to communicate with other nodes. + +The installation script guesses accessible host name of the node automatically. +You can confirm what value is detected as the host name of the node itself, by following command: ~~~ -$ host=192.168.100.50 -$ curl https://raw.githubusercontent.com/droonga/droonga-engine/master/install.sh | \ - sudo HOST=$host bash -$ curl https://raw.githubusercontent.com/droonga/droonga-http-server/master/install.sh | \ - sudo ENGINE_HOST=$host HOST=$host bash +# cat ~droonga-engine/droonga/droonga-engine.yaml | grep host +host: XXXXXXXX ~~~ -Then the computer `node0` (`192.168.100.50`) is successfully set up as a Droonga node. +However it may be misdetected if the computer is not configured properly. +For example, even if a node is configured with a host name `node0`, it cannot receive any message from other nodes when others cannot resolve the name `node0` to actual IP address. -Next, run the installation scripts on another node `node1` (`192.168.100.51`). -If the host name `node1` is not resolvable by others, don't forget to specify correct accessible IP address for the computer, like: +Then you have to reconfigure your node with raw IP addresse of the node itself, like: ~~~ -$ host=192.168.100.51 -$ curl https://raw.githubusercontent.com/droonga/droonga-engine/master/install.sh | \ - sudo HOST=$host bash -$ curl https://raw.githubusercontent.com/droonga/droonga-http-server/master/install.sh | \ - sudo ENGINE_HOST=$host HOST=$host bash +(on node0=192.168.100.50) +# host=192.168.100.50 +# droonga-engine-configure --quiet --reset-config --reset-catalog \ + --host=$host +# droonga-http-server-configure --quiet --reset-config \ + --droonga-engine-host-name=$host \ + --receive-host-name=$host + +(on node1=192.168.100.51) +# host=192.168.100.51 +... ~~~ -OK, now two computers successfully prepared to work as Droonga nodes. +Then your computer `node0` is configured as a Droonga node with the host name `192.168.100.50`, and `node1` becomes a node with the name `192.168.100.51`. +As said before, *the configured name is used in various situations*, so *don't forget what is the name of each node*. -If the installation script doesn't work as expected, see [the tutorial to install services without installation script](../manual-install/). +This tutorial assumes that all your computers can resolve each other host name `node0` and `node1` correctly. +Otherwise, read host names `node0` and `node1` in following instructions, as raw IP addresses like `192.168.100.50` and '192.168.100.51`. +By the way, you can specify your favorite value as the host name of the computer itself via environment variables, for the installation script, like: + +~~~ +(on node0=192.168.100.50) +# host=192.168.100.50 +# curl https://raw.githubusercontent.com/droonga/droonga-engine/master/install.sh | \ + HOST=$host bash +# curl https://raw.githubusercontent.com/droonga/droonga-http-server/master/install.sh | \ + ENGINE_HOST=$host HOST=$host bash + +(on node1=192.168.100.51) +# host=192.168.100.51 +... +~~~ + +This option will help you, if you already know that your computers are not configured to resolve each other name. ### Configure nodes to work together as a cluster Currently, these nodes are still individual nodes. Let's configure them to work together as a cluster. -Run this command line on each node: - -~~~ -$ sudo -u droonga-engine -H \ - droonga-engine-catalog-generate --hosts=node0,node1 \ - --output=~droonga-engine/droonga/catalog.json -~~~ - -If you are using a CentOS server, switch to the root before running, instead of using `sudo`, like: +Run commands like this, on each node: ~~~ -$ su # droonga-engine-catalog-generate --hosts=node0,node1 \ --output=~droonga-engine/droonga/catalog.json # chown droogna-engine:droonga-engine ~droonga-engine/droonga/catalog.json ~~~ -NOTE: For the `--hosts` parameter, you must specify host names or IP addresses of all your Droonga nodes which are actually configured to be used. -To confirm the suitable value, see the `~droonga-engine/droonga/droonga-engine.yaml`, like: - -~~~ -$ cat ~droonga-engine/droonga/droonga-engine.yaml | grep host -host: 192.168.100.50 -~~~ - -For example, if nodes cannot resolve their host names and you configured them with IP addresses like `HOST=192.168.100.50`, then: +Of course you must specify correct host name of nodes by the `--hosts` option. +If your nodes are configured with raw IP addresses, the cmmand line is: ~~~ -$ sudo -u droonga-engine -H \ - droonga-engine-catalog-generate --hosts=192.168.100.50,192.168.100.51 \ - --output=~droonga-engine/droonga/catalog.json +# droonga-engine-catalog-generate --hosts=192.168.100.50,192.168.100.51 \ + --output=~droonga-engine/droonga/catalog.json +... ~~~ OK, now your Droonga cluster is correctly prepared. @@ -369,7 +422,7 @@ Let's see it by the `table_list` command: Because it is a cluster, another endpoint returns same result. ~~~ -# curl "http://192.168.100.51:10041/d/table_list" | jq "." +# curl "http://node1:10041/d/table_list" | jq "." 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