{"id":11175,"date":"2018-05-02T09:25:05","date_gmt":"2018-05-02T07:25:05","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2\/"},"modified":"2018-05-02T09:25:05","modified_gmt":"2018-05-02T07:25:05","slug":"deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2\/","title":{"rendered":"Deploy a Cloudera cluster with Terraform and Ansible in Azure &#8211; part 2"},"content":{"rendered":"<p>In this part of the blog posts series, we will show how ansible helps us to configure our cluster and install all pre-requisite needed for Cloudera Manager. Ansible is one of the most important automation tools currently.<\/p>\n<p>Ansible will help us to configure all nodes for a manual installation using Cloudera Manager. Our playbook will contain the following roles:<\/p>\n<ul>\n<li>cm_repo: <em>add the same C.M repo into all nodes.<\/em><\/li>\n<li>os_config: <em>Adjust all OS parameter for installing a Cloudera cluster.\u00a0<\/em><\/li>\n<li>java: <em>Java JDK 1.7.80 installation.<\/em><\/li>\n<li>cm_agents: <em>Installation of the C.M <\/em>agent&#8217;s<em> packages<\/em><\/li>\n<li>MariaDB: <em>Installation of a MariaDB. C.M needs an Oracle, MySQL (MariaDB) or PostgreSQL database for Cloudera Manager meta-data storage and Hive meta-store.<\/em><\/li>\n<li>mysql_connector: <em>Installation of the MySQL connector for connecting to MariaDB.\u00a0<\/em><\/li>\n<li>scm: <em>Install and start the Cloudera Manager Server.<\/em><\/li>\n<\/ul>\n<p>In a Big Data cluster, we split the node into roles.<\/p>\n<ul>\n<li>Manager: <em>dedicated node for all Cloudera Manager daemons<\/em><\/li>\n<li>Master: <em>NameNode daemon + Secondary NameNode daemon<\/em><\/li>\n<li>Workers: <em>DataNode daemons<\/em><\/li>\n<\/ul>\n<p>The first step is to define the Ansible hosts inventory file. Below my inventory file.<\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\">[db_server]\nmanager ansible_host=&lt;manager_ip&gt; id=6\n\n[cdh_manager]\nmanager  ansible_host=&lt;manager_ip&gt; id=6\n\n[cdh_master]\nmaster ansible_host=&lt;master_ip&gt;  id=5\n\n[cdh_worker]\nworker1 ansible_host=&lt;worker1&gt;  id=2\nworker2 ansible_host=&lt;worker2&gt;  id=3\nworker3 ansible_host=&lt;worker3&gt;  id=4\n\n[cdh_servers:children]\ncdh_worker\ncdh_master\ncdh_manager\n\n\n[all:vars]\nansible_user=centos\nansible_ssh_pass=&lt;YOUR_PASSWORD&gt;\nansible_sudo_pass=&lt;YOUR_PASSWORD&gt;<\/pre>\n<p>We will now, define all variable needed for our roles. Variables are split into roles:<\/p>\n<p>Below the example of variables definition for CDH server instances: cdh_servers.yml<\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\">---\n\ndb_hostname: \"{{ hostvars[groups['db_server'][0]]['inventory_hostname'] }}\"\nscm_hostname: \"{{ hostvars[groups['cdh_manager'][0]]['inventory_hostname'] }}\"\n\ncdh_version: 5.14.2\ncluster_display_name: cluster_1\n\n# Users and Groups\ngroup:\n  - dbi\nuser:\n  - dbi\n\n# Java variables\njava_download_url: http:\/\/ftp.osuosl.org\/pub\/funtoo\/distfiles\/oracle-java\/jdk-7u80-linux-x64.tar.gz\njava_download_folder: \/usr\/java\njava_name: \"{{java_download_folder}}\/jdk1.7_80\"\njava_archive: \"{{java_download_folder}}\/jdk-7u80-linux-x64.tar.gz\"\n\n# Mysql Java connector\nmysql_java: mysql-connector-java-5.1.46\nmysql_java_download_url: https:\/\/dev.mysql.com\/get\/Downloads\/Connector-J\/\"{{mysql_java_archive}}\"\nmysql_java_download_folder: \/usr\/share\/mysql-java\/\nmysql_java_archive: \"{{ mysql_java_download_folder }}\/{{ mysql_java }}.tar.gz\"\n\nmysql_java_jar: \/usr\/share\/java\/mysql-connector-java.jar<\/pre>\n<p>Same files will created for database server variable (db_server.yml) and Cloudera Manager server variables (scm_server.yml).<\/p>\n<p>After the variables definition, we can start creating the different roles and their associated tasks.<\/p>\n<h3>\u00a0Cloudera Manager repo<\/h3>\n<p>The goal of this role is to add the same C.M repo in all cluster hosts. We will use a template of the repository file.<\/p>\n<p>cloudera-manager.repo.j2<\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\">[cloudera-manager]\n# Packages for Cloudera Manager, Version 5, on RedHat or CentOS 7 x86_64\nname=Cloudera Manager\nbaseurl=https:\/\/archive.cloudera.com\/cm5\/redhat\/7\/x86_64\/cm\/{{cdh_version}}\/\ngpgkey=https:\/\/archive.cloudera.com\/cm5\/redhat\/7\/x86_64\/cm\/RPM-GPG-KEY-cloudera\ngpgcheck = 1<\/pre>\n<p>cm_repo:<\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\">---\n- name: Add Cloudera repo\n\u00a0 template:\n\u00a0\u00a0\u00a0 src: ..\/templates\/cloudera-manager.repo.j2\n\u00a0\u00a0\u00a0 dest: \"\/etc\/yum.repos.d\/cloudera-manager{{cdh_version}}.repo\"<\/pre>\n<p>The definition of the Cloudera Manager version has previously done in the cdh_servers.yml variable file.<\/p>\n<p>OS Configuration<\/p>\n<p>Some requirements are needed before installing a Cloudera cluster. This role will configure all hosts with Cloudera requirements: <a title=\"https:\/\/www.cloudera.com\/documentation\/enterprise\/release-notes\/topics\/rn_consolidated_pcm.html#cmig_topic_4\" href=\"https:\/\/www.cloudera.com\/documentation\/enterprise\/release-notes\/topics\/rn_consolidated_pcm.html#cmig_topic_4\">https:\/\/www.cloudera.com\/documentation\/enterprise\/release-notes\/topics\/rn_consolidated_pcm.html#cmig_topic_4 .<\/a><\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\">---\n- name: Create groups\n\u00a0 group:\n\u00a0\u00a0\u00a0 name: \"{{item}}\"\n\u00a0\u00a0\u00a0 state: present\n\u00a0 with_items: \"{{group}}\"\n\n- name: Create user\n\u00a0 user:\n\u00a0\u00a0\u00a0 name: \"{{item}}\"\n\u00a0\u00a0\u00a0 shell: \/bin\/bash\n\u00a0\u00a0\u00a0 uid: 1050\n\u00a0\u00a0\u00a0 groups: \"{{group}}\"\n\u00a0 with_items: \"{{user}}\"\n\n- name: \"Build hosts file\"\n\u00a0 lineinfile:\n\u00a0\u00a0\u00a0 dest: \/etc\/hosts\n\u00a0\u00a0\u00a0 regexp: '.*{{ item }}$'\n\u00a0\u00a0\u00a0 line: \"{{ hostvars[item]['ansible_default_ipv4']['address'] }} {{item}}\"\n\u00a0\u00a0\u00a0 state: present\n\u00a0 when: hostvars[item]['ansible_default_ipv4']['address'] is defined\n\u00a0 with_items: '{{groups.all}}'\n\n\n- name: Disable transparent huge page - defrag\n\u00a0 shell: echo \"never\" &gt; \/sys\/kernel\/mm\/transparent_hugepage\/defrag\n\n- name: Disable transparent huge page - enabled\n\u00a0 shell: echo \"never\" &gt; \/sys\/kernel\/mm\/transparent_hugepage\/enabled\n\n- name: VM swappiness - 1\n\u00a0 shell: echo \"1\" &gt; \/proc\/sys\/vm\/swappiness\n\n- name: Set VM swappiness - 2\n\u00a0 sysctl:\n\u00a0\u00a0\u00a0 name: vm.swappiness\n\u00a0\u00a0\u00a0 value: 1\n\u00a0\u00a0\u00a0 state: present\n\n- name: Create \/data dir\n\u00a0 file:\n\u00a0\u00a0\u00a0 path: \/data\n\u00a0\u00a0\u00a0 state: directory\n\u00a0\u00a0\u00a0 mode: 0775\n\u00a0\u00a0\u00a0 owner: dbi\n\u00a0\u00a0\u00a0 group: dbi\n\n- name: Create file system on volume\n\u00a0 filesystem:\n\u00a0\u00a0\u00a0 fstype: ext4\n\u00a0\u00a0\u00a0 dev: \/dev\/xvdb\n\n- name: Mount volume as \/data\n\u00a0 mount:\n\u00a0\u00a0\u00a0 name: \/data\n\u00a0\u00a0\u00a0 src: \/dev\/xvdb\n\u00a0\u00a0\u00a0 fstype: ext4\n\u00a0\u00a0\u00a0 opts: defaults,noatime\n\u00a0\u00a0\u00a0 state: mounted\n\n- name: install the latest version of ntp\n\u00a0 yum:\n\u00a0\u00a0\u00a0 name: ntp\n\u00a0\u00a0\u00a0 state: latest\n\n- name: install the latest version of nscd\n\u00a0 yum:\n\u00a0\u00a0\u00a0 name: nscd\n\u00a0\u00a0\u00a0 state: latest\n\n- name: install wget\n\u00a0 yum:\n\u00a0\u00a0\u00a0 name: wget\n\u00a0\u00a0\u00a0 state: latest\n\n- name: Disable SELinux\n\u00a0 selinux:\n\u00a0\u00a0\u00a0 state: disabled\n\n- name: Reboot for SELinux if needed\n\u00a0 command: \/sbin\/shutdown -r +1\n\u00a0 async: 0\n\u00a0 poll: 0<\/pre>\n<h3>Java installation<\/h3>\n<p>The Java installation is one of the most complex parts of the installation. First, we need to choose a supported version of JDK. Then we need to be sure that Java has been installed properly in all hosts. The installation tasks is split into the following part:<\/p>\n<ul>\n<li>Create installation directories: \/usr\/share\/java and \/usr\/java<\/li>\n<li>Download Java JDK 1.7.80 which is a supported version for Cloudera Manager<\/li>\n<li>Unarchive Java JDK<\/li>\n<li>Fix ownership<\/li>\n<li>Make Java available for the system with alternatives<\/li>\n<li>Clean up installation download folder<\/li>\n<li>Add Java home path by exporting $JAVA_HOME variable<\/li>\n<\/ul>\n<p>Below the java install tasks.<\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\"><\/pre>\n<pre class=\"brush: text; gutter: true; first-line: 1\">---\n- name: Create directories\n\u00a0 file:\n\u00a0\u00a0\u00a0 path: \"{{ item }}\"\n\u00a0\u00a0\u00a0 state: directory\n\u00a0 with_items:\n\u00a0\u00a0\u00a0 - \"{{ java_download_folder }}\"\n\u00a0\u00a0\u00a0 - \"\/usr\/share\/java\"\n\n- name: Creates directory\n\u00a0 file:\n\u00a0\u00a0\u00a0 path:\u00a0 \"{{ java_download_folder }}\"\n\u00a0\u00a0\u00a0 state: directory\n\n\n- name: Download Java\n\u00a0 get_url:\n\u00a0\u00a0\u00a0 url: \"{{ java_download_url }}\"\n\u00a0\u00a0\u00a0 dest: \"{{ java_archive }}\"\n\u00a0\u00a0\u00a0 headers: \"Cookie:' gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie'\"\n\u00a0\u00a0\u00a0 validate_certs: no\n\n- name: Unarchive Java archive\n\u00a0 unarchive:\n\u00a0\u00a0\u00a0 src: \"{{ java_archive }}\"\n\u00a0\u00a0\u00a0 dest: \"{{ java_download_folder }}\"\n\u00a0\u00a0\u00a0 copy: no\n\n- name: Fix ownership\n\u00a0 file:\n\u00a0\u00a0\u00a0 state: directory\n\u00a0\u00a0\u00a0 path: \"{{ java_name }}\"\n\u00a0\u00a0\u00a0 owner: root\n\u00a0\u00a0\u00a0 group: root\n\u00a0\u00a0\u00a0 recurse: yes\n\n- name: Make Java available for system with alternatives\n\u00a0 command: 'alternatives --install \"\/usr\/bin\/java\" \"java\" \"{{java_name}}\/bin\/java\" 2'\n\n- name: Clean up Java download\n\u00a0 file:\n\u00a0\u00a0\u00a0 state: absent\n\u00a0\u00a0\u00a0 path: \"{{java_archive}}\"\n\n- name: Add java home path\n\u00a0 blockinfile:\n\u00a0\u00a0\u00a0 dest: \/etc\/profile\n\u00a0\u00a0\u00a0 block: |\n\u00a0\u00a0\u00a0\u00a0\u00a0 export JAVA_HOME=\/usr\/java\/jdk1.7.0_80\n\u00a0\u00a0\u00a0\u00a0\u00a0 export PATH=$JAVA_HOME\/bin:$PATH\n\u00a0\u00a0\u00a0\u00a0\u00a0 regexp: \"JAVA_HOME\"\n\u00a0\u00a0\u00a0 state: present<\/pre>\n<h3>MariaDB installation<\/h3>\n<p>After installing Java, we can start the installation and configuration of MariaDB database. You can find the entire role for MariaDB installation <a href=\"https:\/\/github.com\/MehB\/cdh_installation\/tree\/master\/roles\/mariadb\">here<\/a>.<\/p>\n<h3>MySQL connector<\/h3>\n<p>MySQL connector installation steps will follow approximatively the same steps as Java installation. All details <a href=\"https:\/\/github.com\/MehB\/cdh_installation\/blob\/master\/roles\/mysql_connector\/tasks\/main.yml\">here<\/a>.<\/p>\n<h3>Cloudera Manager Server installation<\/h3>\n<p>The last role of this playbook is the installation of Cloudera Manager server. This role will simply install the Cloudera Manager server package in the cdh_manager host and start the 2 following deamons:<\/p>\n<ul>\n<li>cloudera-manager-daemons<\/li>\n<li>cloudera-manager-server<\/li>\n<\/ul>\n<pre class=\"brush: text; gutter: true; first-line: 1\">---\n- include_vars: ..\/..\/..\/group_vars\/db_server.yml\n\n- name: Install the Cloudera Manager Server Packages\n\u00a0 yum:\n\u00a0\u00a0\u00a0 name: \"{{ item }}\"\n\u00a0\u00a0\u00a0 state: installed\n\u00a0 with_items:\n\u00a0\u00a0\u00a0 - cloudera-manager-daemons\n\u00a0\u00a0\u00a0 - cloudera-manager-server\n\n# - name: Prepare Cloudera Manager Server External Database\n#\u00a0\u00a0 command: \/usr\/share\/cmf\/schema\/scm_prepare_database.sh\n#\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 -f\n#\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 --host {{ hostvars[db_hostname]['inventory_hostname'] }}\n#\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mysql {{ databases.scm.name }} {{ databases.scm.user }} {{ databases.scm.pass }}\n#\u00a0\u00a0 changed_when: False\n\n- name: Start the Cloudera Manager Server\n\u00a0 service:\n\u00a0\u00a0\u00a0 name: \"{{ item }}\"\n\u00a0\u00a0\u00a0 state: restarted\n\u00a0\u00a0\u00a0 enabled: yes\n\u00a0 notify:\n\u00a0\u00a0\u00a0 - wait cloudera-scm-server\n\u00a0 with_items:\n\u00a0\u00a0\u00a0 - cloudera-scm-server\n\u00a0\u00a0\u00a0 - cloudera-scm-agent\n\n# Trigger handler to wait for SCM to startup\n- meta: flush_handlers<\/pre>\n<p>&nbsp;<\/p>\n<h3>site.yml<\/h3>\n<p>After creating all roles, we need to define our site.yml in order to execute all tasks in the desired order.<\/p>\n<pre class=\"brush: text; gutter: true; first-line: 1\">---\n# Cloudera playbook\n\n- name: Configure Cloudera Manager Repository\n\u00a0 become: ansible_become\n\u00a0 hosts: cdh_servers\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - cm_repo\n\u00a0 tags: cm_repo\n\n- name: Configure Epel repository\n\u00a0 become: ansible_become\n\u00a0 hosts: cdh_servers\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - epel\n\u00a0 tags: epel_repo\n\n- name: OS Configuration\n\u00a0 become: ansible_become\n\u00a0 hosts: cdh_servers\n\u00a0 roles:\n\u00a0\u00a0\u00a0\u00a0\u00a0 - os_config\n\u00a0 tags: os_config\n\n- name: Install Java JDK 7\n\u00a0 become: ansible_become\n\u00a0 hosts: cdh_servers\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - java\n\u00a0 tags: java\n\n- name: Install MySQL Java Connector\n\u00a0 become: ansible_become\n\u00a0 hosts: cdh_servers\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - mysql_connector\n\u00a0 tags: mysql_java_connector\n\n- name: Install MariaDB and create databases\n\u00a0 hosts: db_server\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - mariadb\n\u00a0 tags: mysql\n\n# ##############\n- name: Install Cloudera Manager Agents\n\u00a0 hosts: cdh_servers\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - cm_agents\n\u00a0 tags: cm_agents\n\n- name: Install Cloudera Manager Server\n\u00a0 hosts: cdh_manager\n\u00a0 roles:\n\u00a0\u00a0\u00a0 - scm\n\u00a0 tags: cluster_template<\/pre>\n<p>&nbsp;<\/p>\n<p>When all steps will finish, you can access to Cloudera Manager web interface by the following:<\/p>\n<p>http:\/\/&lt;cdh_manager_ip&gt;:7180<\/p>\n<p>Be sure, your network configuration is well configured to allow access to Cloudera Manager webUI through the default 7180 port.<\/p>\n<p><a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Screen-Shot-2018-04-20-at-15.26.08.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-22930\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Screen-Shot-2018-04-20-at-15.26.08.png\" alt=\"Cloudera-Manager\" width=\"1919\" height=\"1057\" \/><\/a><\/p>\n<p>The entire project with all files is available <a href=\"https:\/\/github.com\/MehB\/cdh_installation\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this part of the blog posts series, we will show how ansible helps us to configure our cluster and install all pre-requisite needed for Cloudera Manager. Ansible is one of the most important automation tools currently. Ansible will help us to configure all nodes for a manual installation using Cloudera Manager. Our playbook will [&hellip;]<\/p>\n","protected":false},"author":109,"featured_media":11102,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1183,955,368],"tags":[150,1338,135,1339,151],"type_dbi":[],"class_list":["post-11175","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-big-data","category-cloud","category-development-performance","tag-ansible","tag-azure","tag-cloud","tag-cloudera","tag-devops"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Deploy a Cloudera cluster with Terraform and Ansible in Azure - part 2 - dbi Blog<\/title>\n<meta name=\"description\" content=\"Install a Cloudera cluster using Ansible\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Deploy a Cloudera cluster with Terraform and Ansible in Azure - part 2\" \/>\n<meta property=\"og:description\" content=\"Install a Cloudera cluster using Ansible\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2018-05-02T07:25:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Screen-Shot-2018-04-20-at-15.26.08.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1919\" \/>\n\t<meta property=\"og:image:height\" content=\"1057\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"DevOps\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"DevOps\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/deploy-a-cloudera-cluster-with-terraform-and-ansible-in-azure-part-2\\\/\"},\"author\":{\"name\":\"DevOps\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/#\\\/schema\\\/person\\\/4cd1b5f8a3de93f05a16ab8d7d2b7735\"},\"headline\":\"Deploy a Cloudera cluster with Terraform and Ansible in Azure &#8211; 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