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# Ansible Playbook For Setup Hadoop HDFS | ||
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## Roles Variables | ||
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### Installation Vars | ||
```yaml | ||
hdfs_unarchived_filename: "hadoop-3.3.3" | ||
hdfs_download_link: "https://downloads.apache.org/hadoop/common/{{hdfs_unarchived_filename}}/{{hdfs_unarchived_filename}}.tar.gz" | ||
hdfs_download_sha_sum: "9ac5a5a8d29de4d2edfb5e554c178b04863375c5644d6fea1f6464ab4a7e22a50a6c43253ea348edbd114fc534dcde5bdd2826007e24b2a6b0ce0d704c5b4f5b" | ||
hdfs_download_destination: "/opt/{{hdfs_unarchived_filename}}.tar.gz" | ||
hdfs_unarchive_destination: "/opt/" | ||
``` | ||
### File core-site.xml Vars | ||
```yaml | ||
hdfs_fs_defaultFS: "ha-cluster" | ||
hdfs_trash_interval: 1440 | ||
hdfs_dfs_journalnode_edits_dir: "/var/lib/hadoop/journal" | ||
hdfs_ha_zookeeper_quorum: | ||
- "172.16.21.125:49162" | ||
- "172.16.21.125:49163" | ||
- "172.16.21.125:49164" | ||
``` | ||
### File hadoop-env.sh Vars | ||
```yaml | ||
hdfs_namenode_user: root | ||
hdfs_datanode_user: root | ||
hdfs_secondarynamenode_user: root | ||
hdfs_journalnode_user: root | ||
hdfs_zkfc_user: root | ||
hdfs_java_home: /usr | ||
hdfs_hadoop_home: /opt/hadoop | ||
hdfs_hadoop_conf_dir: /opt/hadoop/etc/hadoop | ||
hdfs_hadoop_daemon_root_logger: WARN,RFA | ||
hdfs_hadoop_heapsize_max: '' | ||
hdfs_hadoop_heapsize_min: '' | ||
hdfs_hadoop_jaas_debug: '' | ||
hdfs_hadoop_workers: '' | ||
hdfs_hadoop_log_dir: '' | ||
hdfs_hadoop_pid_dir: '' | ||
hdfs_hadoop_niceness: '' | ||
``` | ||
### File hdfs-site.xml Vars | ||
```yaml | ||
hdfs_dfs_replication: 1 | ||
hdfs_dfs_namenode_name_dir: /var/lib/hadoop/hadoop-name-{{hostvars[inventory_hostname]['name']}} | ||
hdfs_dfs_nameservices: "ha-cluster" | ||
hdfs_dfs_datanode_data_dir: /var/lib/hadoop/hadoop-data-{{hostvars[inventory_hostname]['name']}} | ||
hdfs_ha_automatic_failover_enabled: "true" | ||
hdfs_dfs_ha_fencing_methods: "sshfence" | ||
hdfs_dfs_ha_fencing_ssh_private_key_files: /root/.ssh/id_rsa | ||
hdfs_dfs_namenode_datanode_registration_ip_hostname_check: '' | ||
``` | ||
### Disk Management Vars | ||
```yaml | ||
disk: /dev/sdb | ||
destination: /var/lib/hadoop | ||
filesystem: ext4 | ||
allow_disk_mount: false | ||
``` | ||
### Dns Vars | ||
```yaml | ||
dns_server: 172.16.21.128 | ||
allow_dns: true | ||
``` | ||
## Example Playbook | ||
### Inventory | ||
```ini | ||
[activenamenodeserver] | ||
172.16.21.125 name=n1 rpc_port=9000 http_port=9870 | ||
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[standbynamenodeservers] | ||
172.16.21.127 name=n2 rpc_port=9000 http_port=9870 | ||
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[namenodeservers:children] | ||
activenamenodeserver | ||
standbynamenodeservers | ||
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[datanodeservers] | ||
172.16.21.128 name=n3 | ||
172.16.21.129 name=n4 | ||
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[qjournalnodeservers] | ||
172.16.21.125 | ||
172.16.21.127 | ||
172.16.21.128 | ||
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[all:vars] | ||
ansible_user=root | ||
ansible_connection=ssh | ||
ansible_ssh_port=22 | ||
``` | ||
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### Installation | ||
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```yaml | ||
- name: install-hdfs | ||
hosts: all | ||
become: true | ||
become_user: root | ||
roles: | ||
- install-hdfs | ||
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- name: start journalnodes | ||
hosts: qjournalnodeservers | ||
roles: | ||
- journalnode | ||
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- name: start namenodes | ||
hosts: namenodeservers | ||
roles: | ||
- namenode | ||
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- name: start datanodes | ||
hosts: datanodeservers | ||
roles: | ||
- datanode | ||
``` | ||
``` | ||
ansible-playbook -i inventory.ini hdfs.yaml | ||
``` | ||
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### Destroy Whole HDFS After Installation | ||
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```yaml | ||
- name: destroy-hdfs | ||
hosts: all | ||
become: true | ||
become_user: root | ||
strategy: linear | ||
roles: | ||
- destroy-hdfs | ||
``` | ||
``` | ||
ansible-playbook -i inventory.ini destroy.yaml | ||
``` |