- name: Configure Kerberos for Hadoop Users
hosts: hadoop_servers
become: no
gather_facts: no
vars:
kerberos_server: hadoop1.xuexi.com
keytab_file_path: /home/hadoop/keys/hadoop.keytab
principals:
- nn/
- dn/
- yarn/
- starrock/
tasks:
- name: Ensure key directory exists
ansible.builtin.file:
path: /home/hadoop/hxy
state: directory
mode: '0755'
- name: Create Kerberos principals
ansible.builtin.command: >
kadmin.local -q 'addprinc -randkey {
{ item }}{
{ inventory_hostname }}@XUEXI.COM'
register: addprinc_output
ignore_errors: yes
delegate_to: "{
{ kerberos_server }}"
loop: "{
{ principals }}"
loop_control:
extended: yes # Ensure extended loop variables are available
- name: Check principal creation status
ansible.builtin.fail:
msg: "Failed to create principal for {
{ item.item }}: {
{ item.stderr }}"
when: "'Principal already exists' not in item.stderr and item.rc != 0"
loop: "{
{ addprinc_output.results }}"
loop_control:
label: "{
{ item.item }}{
{ inventory_hostname }}@XUEXI.COM"
- name: Generate keytab file for each principal
ansible.builtin.command: >
kadmin.local -q 'xst -k {
{ keytab_file_path }}.tmp -norandkey {
{ item }}{
{ inventory_hostname }}@XUEXI.COM'
register: xst_output
delegate_to: "{
{ kerberos_server }}"
loop: "{
{ principals }}"
when: "'Principal already exists' in (addprinc_output.results | selectattr('item', 'equalto', item) | first).stderr or (addprinc_output.results | selectattr('item', 'equalto', item) | first).rc == 0"
# Note: The above when condition is simplified and may need adjustment.
# It assumes that if 'Principal already exists', it's okay to proceed.
# However, a more robust solution would involve tracking success/failure per principal.
- name: Move keytab file to final location (on Kerberos server)
ansible.builtin.command: mv {
{ keytab_file_path }}.tmp {
{ keytab_file_path }}
delegate_to: "{
{ kerberos_server }}"
when: xst_output is changed # This might not be perfect, as 'changed' depends on file existence, not Kerberos operation.
- name: Fetch the keytab file to the control machine
ansible.builtin.fetch:
src: "{
{ keytab_file_path }}"
dest: "./hadoop.keytab"
flat: yes
delegate_to: "{
{ kerberos_server }}"
run_once: yes # Ensure this task runs only once.
- name: Distribute keytab files to each target host
ansible.builtin.copy:
src: ./hadoop.keytab
dest: /data1/tmp/hadoop.keytab
loop: "{
{ groups['hadoop_servers'] }}"
delegate_to: "{
{ item }}"
- name: Clean up local keytab file
ansible.builtin.file:
path: ./hadoop.keytab
state: absent
run_once: yes