jvm-histo-playbook.yaml

# Usage: ansible-playbook -i hosts jvm-histo-playbook.yaml

---
- hosts: memleak
  tasks:
      - name: Set target java process
        set_fact:
            target_jar: "memleak-assembly-0.1.jar"

      - name: Setting up the destination directory
        set_fact:
            dest_dir: "./histo"

      - name: Determine the file name for the histogram
        set_fact:
            histo_dir: "/tmp"
            histo_file_base: "{{ inventory_hostname }}_jmap-histo-{{ ansible_date_time.epoch }}"

      - name: Derive histo files
        set_fact:
            histo_file: "{{ histo_file_base }}.txt"
            histo_csv_size: "{{ histo_file_base }}.size.csv"
            histo_csv_count: "{{ histo_file_base }}.count.csv"

      - name: Collect the pid of the jvm to monitor
        shell: "cat {{ target_jar }}.pid"
        register: command_output

      - set_fact:
            stream_pid: "{{ command_output.stdout }}"

      - name: Dump class histogram from jvm
        shell: sudo su vagrant -c "jmap -histo {{ stream_pid }} > /tmp/{{ histo_file }}"

      - name: Convert object counts to csv
        shell: "cat {{ histo_dir }}/{{ histo_file }} | tail -n +4 | head -n -1 | awk '{ print \"count.{{ inventory_hostname }}.\"$4, $2, {{ ansible_date_time.epoch }} }' > {{ histo_dir }}/{{ histo_csv_count }}"

      - name: Convert object size to csv
        shell: "cat {{ histo_dir }}/{{ histo_file }} | tail -n +4 | head -n -1 | awk '{ print \"size.{{ inventory_hostname }}.\"$4, $3, {{ ansible_date_time.epoch }} }' > {{ histo_dir }}/{{ histo_csv_size }}"

      - name: Retrieve histo file for object counts from remote host
        fetch:
            src: "{{ histo_dir }}/{{ histo_csv_count }}"
            dest: "{{ dest_dir }}/{{ histo_csv_count }}"
            flat: yes

      - name: Retrieve histo file for obejct size from remote host
        fetch:
            src: "{{ histo_dir }}/{{ histo_csv_size }}"
            dest: "{{ dest_dir }}/{{ histo_csv_size }}"
            flat: yes

      - name: Remove csv size file from remote host
        become: yes
        become_user: root
        file:
            state: absent
            path: "{{ histo_dir }}/{{ histo_csv_size }}"

      - name: Remove csv count file from remote host
        become: yes
        become_user: root
        file:
            state: absent
            path: "{{ histo_dir }}/{{ histo_csv_count }}"

      - name: Remove raw object file from remote host
        become: yes
        become_user: root
        file:
            state: absent
            path: "{{ histo_dir }}/{{ histo_file }}"

- hosts: local
  tasks:
      - name: Configuring Sumo collector ip
        set_fact:
            collectorip: "localhost"

      - name: Configuring Sumo collector port
        set_fact:
            collectorport: "2003"

      - name: Setting up the destination directory
        set_fact:
            dest_dir: "./histo"

      - name: Send object counts and sizes
        shell: "cat {{ item }} | nc -q0 {{ collectorip }} {{ collectorport }}"
        with_fileglob: "{{ playbook_dir }}/{{ dest_dir }}/*"

      - name: Remove files
        file:
            state: absent
            path: "{{ item }}"
        with_fileglob: "{{ playbook_dir }}/{{ dest_dir }}/*"