How can we install Couchbase cluster Via Ansible In Rhel8

Couchbase Server
1

Hi All

anyone help me installing Couchbase cluster via Ansible In Rhel8 please help me in this
if there any github link is there reference for RHEL8 for Couchbase via Ansible Please share the Link

Thanks
Nagasai

2

Welcome to Couchbase forums @nagasai!

We use ansible to install couchbase on centos boxes for some of our testing but not for rhel8. But the install steps for both are not that different. Here is a snippet from our script that you can try out in your setup:

  - hosts: centos 
    vars:
      rpm_path: "/tmp/couchbase.rpm" (change this to your rpm location)
    remote_user: <your username here>
    tasks:
    - name: set vm.swappiness to 0
      shell: "echo 0 > /proc/sys/vm/swappiness"
    - name: disable thp
      shell: "echo never > /sys/kernel/mm/transparent_hugepage/enabled"
    - name: remove core conf file if any
      shell: "rm -f /etc/security/limits.d/core.conf"
      ignore_errors: True
    - name: create core conf file
      shell: "touch /etc/security/limits.d/core.conf"
    - name: append hard core limit
      shell: "echo 'couchbase       hard        core        unlimited' >> /etc/security/limits.d/core.conf"
    - name: append soft core limit
      shell: "echo 'couchbase       soft        core        unlimited' >> /etc/security/limits.d/core.conf"
    - name: set default limit core to infinity step 1
      shell: "echo '[Manager]' > /etc/systemd/system.conf"
    - name: set default limit core to infinity step 2
      shell: "echo 'DefaultLimitCORE=infinity' >> /etc/systemd/system.conf"
    - name: reload systemctl daemon
      shell: "systemctl daemon-reexec"
    - name: disable thp defrag
      shell: "echo never > /sys/kernel/mm/transparent_hugepage/defrag"
    - name: cleanup old pkg dirs
      shell: "rm {{rpm_path}} 2>/dev/null"
      ignore_errors: True
    - pam_limits: domain=root limit_type='-' limit_item=core value=unlimited
    - name: rm locks
      shell: "rm -f /var/lib/rpm/.rpm.lock"
      ignore_errors: True
    - name: stop rpm
      shell: "killall -9 rpm"
      ignore_errors: True
  - name: stop couchbase
    shell: "ps aux | grep 'couchbase' | awk '{print $2}' | xargs kill -s 9"
    ignore_errors: True
  - name: stop memcached
    shell: "ps aux | grep 'memcached' | awk '{print $2}' | xargs kill -s 9"
    ignore_errors: True
  - name: stop epmd
    shell: "ps aux | grep 'epmd' | awk '{print $2}' | xargs kill -s 9"
    ignore_errors: True
  - name: uninstall couchbase
    yum: name=couchbase-server state=absent
  - name: rm opt dir
    shell: "rm -rf /opt/couchbase"
  - name: install couchbase
    yum: name="{{rpm_path}}"
  - name: alt start 
    shell: /opt/couchbase/etc/couchbase_init.d start
    ignore_errors: True
  - name: flush iptables 
    shell: iptables -F
  - name: wait for install done
    wait_for: port=8091 delay=10

Hosts file should like this:

    [centos]
    <hostname of machine>
    [all:vars]
    ansible_connection=ssh 
    ansible_ssh_user=<your username>
   ansible_ssh_pass=<your password>