Python cassandra installer

README.md

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-# ansible-cassandra
+# Cassandra Database
+
+Install [Cassandra](http://cassandra.apache.org/) database
+
+## Role Variables
+
+##Optional
+
+## License
+
+Apache License, Version 2.0

defaults/main.yml

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+---
+
+# Cassandra release history
+# 2.1.8   2015-07-09
+# 2.1.9   2015-08-28
+# 2.2.0   2015-07-21
+# 2.2.1   2015-09-01
+# 3.0.0   2015-08-28
+
+cassandra_version: 2.2.1
+cassandra_install_dir: /usr/local/etc
+cassandra_log_dir: /var/log/cassandra
+cassandra_data_root_dir: /app/cassandra
+cassandra_link: "{{ cassandra_install_dir }}/cassandra"
+cassandra_log_file: "{{ cassandra_log_dir }}/cassandra.log"
+cassandra_owner: cassandra    # do not confuse with cassandra_user (db username)
+cassandra_group: cassandra
+cassandra_num_tokens: 256
+cassandra_cluster_name: monasca
+cassandra_initial_token: " " # in case of cluster must be calculated
+cassandra_endpoint_snitch: "SimpleSnitch"     # in case of cluster: RackInferringSnitch
+cassandra_hinted_handoff_enabled: true
+cassandra_max_hint_window_in_ms: 10800000     # 10,800,000 = 3 hours
+cassandra_hinted_handoff_throttle_in_kb: 1024
+cassandra_max_hints_delivery_threads: 2
+cassandra_authenticator: AllowAllAuthenticator
+cassandra_authorizer: AllowAllAuthorizer
+cassandra_permissions_validity_in_ms: 2000
+cassandra_partitioner: org.apache.cassandra.dht.Murmur3Partitioner
+cassandra_disk_failure_policy: stop
+cassandra_key_cache_size_in_mb: " "
+cassandra_key_cache_save_period: 14400
+cassandra_row_cache_size_in_mb: 0
+cassandra_row_cache_save_period: 0
+cassandra_memory_allocator: NativeAllocator
+cassandra_row_cache_provider: SerializingCacheProvider
+cassandra_commitlog_sync: periodic
+cassandra_commitlog_sync_period_in_ms: 10000
+cassandra_commitlog_segment_size_in_mb: 32
+cassandra_concurrent_reads: 32
+cassandra_concurrent_writes: 32
+cassandra_trickle_fsync: false
+cassandra_trickle_fsync_interval_in_kb: 10240
+cassandra_storage_port: 7000
+cassandra_ssl_storage_port: 7001
+cassandra_start_native_transport: true
+cassandra_native_transport_port: 9042
+cassandra_start_rpc: true
+cassandra_rpc_port: 9160
+cassandra_rpc_keepalive: true
+cassandra_rpc_server_type: sync
+cassandra_thrift_framed_transport_size_in_mb: 15
+cassandra_incremental_backups: false
+cassandra_snapshot_before_compaction: false
+cassandra_auto_snapshot: true
+cassandra_column_index_size_in_kb: 64
+cassandra_compaction_throughput_mb_per_sec: 16
+cassandra_read_request_timeout_in_ms: 10000
+cassandra_range_request_timeout_in_ms: 10000
+cassandra_write_request_timeout_in_ms: 10000
+cassandra_counter_write_request_timeout_in_ms: 10000
+cassandra_cas_contention_timeout_in_ms: 1000
+cassandra_truncate_request_timeout_in_ms: 60000
+cassandra_request_timeout_in_ms: 10000
+cassandra_dynamic_snitch_update_interval_in_ms: 100
+cassandra_dynamic_snitch_reset_interval_in_ms: 600000
+cassandra_cross_node_timeout: false
+cassandra_dynamic_snitch_badness_threshold: 0.1
+cassandra_request_scheduler: org.apache.cassandra.scheduler.NoScheduler
+cassandra_internode_compression: all
+cassandra_inter_dc_tcp_nodelay: true
+cassandra_auto_bootstrap: false
+cassandra_max_heap_size:
+cassandra_heap_newsize:
+
+#-- Cassandra Opscenter Agent (process running on each Cassandra node)
+
+ops_agent_home_dir: "{{ cassandra_link }}"
+ops_agent_link: "{{ cassandra_link }}/ops-agent"
+ops_agent_log_file: "{{ cassandra_log_file }}/cassandra-ops-agent.log"
+
+#-- Cassandra Opscenter (web admin interface)
+
+opscenter_basename: opscenter
+opscenter_version: 5.1.3
+opscenter_install_dir: "{{ install_dir }}"
+opscenter_agent_basename: "datastax-agent-{{ opscenter_version }}"
+opscenter_agent_fname: "datastax-agent-{{ opscenter_version }}.tar.gz"
+opscenter_agent_url: "http://downloads.datastax.com/community/datastax-agent-{{ opscenter_version }}.tar.gz"
+opscenter_home_dir: "{{ install_dir }}/{{ opscenter_basename }}-{{ opscenter_version }}"
+opscenter_home_link: "{{ install_dir }}/{{ opscenter_basename }}"
+opscenter_log_file: "{{ log_dir }}/{{ opscenter_basename }}/{{ opscenter_basename }}.log"
+opscenter_log_dir: "{{ log_dir }}/{{ opscenter_basename }}"
+opscenter_owner: www-data
+opscenter_group: www-data

handlers/main.yml

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+---
+
+# we moved these handlers to tasks at the end of the install tasks for better timing and control
+# of their execution
+
+#- name: reload supervisor on change
+#  shell: supervisorctl reread && supervisorctl update
+#  when: (supervisor_reload|changed)  # supervisor is register variable
+#
+#- name: restart supervisor on change
+#  shell: service supervisor stop && service supervisor start
+#  when: (supervisor_restart|changed)  # supervisor is register variable
+
+#- name: restart cassandra
+#  supervisorctl: name=cassandra state=restarted

meta/main.yml

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+---
+galaxy_info:
+  author: Michael Bielinski
+  description: Install Cassandra Database - Originally based on the version by Pjan Vandaele
+  license: MIT
+  min_ansible_version: 1.3
+  platforms:
+  - name: Ubuntu
+    versions:
+    - all
+  - name: Debian
+    versions:
+    - all
+  categories:
+  - database
+  - database:nosql
+dependencies: []

tasks/_ops_agent.yml

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+---
+
+- name: download the cassandra agent in /tmp if not yet present
+  command: >
+    wget {{ opscenter_agent_url }}
+    chdir=/tmp
+    creates=/tmp/{{ opscenter_agent_fname }}
+
+- name: expand the cassandra agent in the install dir
+  command: >
+    tar -xvzf /tmp/{{ opscenter_agent_fname }}
+    chdir={{ ops_agent_home_dir }}
+    creates={{ ops_agent_home_dir }}/{{ opscenter_agent_basename }}
+
+- name: update the cassandra agent permissions
+  file: >
+    path={{ ops_agent_home_dir }}/{{ opscenter_agent_basename }}
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    state=directory recurse=yes
+
+- name: create a symbolic link to the agent
+  file: >
+    path={{ ops_agent_link }}
+    src={{ ops_agent_home_dir }}/{{ opscenter_agent_basename }}
+    state=link
+    force=yes
+
+- name: configure ip address of ops center
+  lineinfile: >
+    dest="{{ ops_agent_link }}/conf/address.yaml"
+    create=yes
+    regexp='^(stomp_interface.*)$'
+    line="stomp_interface: {{ cassandra_opscenter_host }}"
+
+- name: supervisor init script
+  template: >
+    src=etc_init.d_cassandra-ops-agent.sh.j2
+    dest=/etc/init.d/cassandra-ops-agent.sh
+    owner=root
+    group=root
+    mode=0755
+  register: supervisor_reload
+
+- name: supervisor config script
+  template: >
+    src=etc_supervisor.d_cassandra-ops-agent.conf.j2
+    dest=/etc/supervisor/conf.d/cassandra-ops-agent.conf
+    owner=root
+    group=root
+    mode=0644
+  register: supervisor_reload

tasks/_supervise.yml

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+---
+- name: install supervisord
+  apt: pkg=supervisor state=installed
+
+- name: ensure supervisord is running and enabled
+  service: name=supervisor state=started enabled=yes
+
+- name: add supervisord config file
+  template: >
+    src=supervisord.conf.j2
+    dest=/etc/supervisor/supervisord.conf
+    owner=root
+    group=root
+    mode=0644
+  register: supervisor_restart
+
+- name: supervisor init script
+  template: >
+    src=etc_init.d_cassandra.sh.j2
+    dest=/etc/init.d/cassandra.sh
+    owner=root
+    group=root
+    mode=0755
+  register: supervisor_reload
+
+- name: install the supervisord cassandra script
+  template: >
+    src=etc_supervisor.d_cassandra.conf.j2
+    dest=/etc/supervisor/conf.d/cassandra.conf
+    owner=root
+    group=root
+    mode=0644
+  register: supervisor_reload
+

tasks/configure.yml

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+---
+- name: Update the cassandra configuration
+  template: >
+    src=conf_{{ item }}.{{cassandra_version}}.j2
+    dest={{ cassandra_link }}/conf/{{ item }}
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    mode=0644
+  with_items:
+    - cassandra.yaml
+    - cassandra-env.sh
+  register: restart_cassandra
+
+- name: restart cassandra
+  supervisorctl: name=cassandra state=restarted
+  when: (restart_cassandra|changed)

tasks/install.yml

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+---
+- name: Create group
+  group: name={{ cassandra_group }} system=yes
+
+- name: Create user
+  user: name={{ cassandra_owner }} system=yes group={{ cassandra_group }}
+
+- name: Create download directory
+  file: path="{{ download_tmp_dir }}" state=directory recurse=yes
+
+- name: Fetch
+  get_url: url=http://archive.apache.org/dist/cassandra/{{ cassandra_version }}/apache-cassandra-{{ cassandra_version }}-bin.tar.gz
+           dest={{ download_tmp_dir }}/apache-cassandra-{{ cassandra_version }}-bin.tar.gz
+  register: get_url_result
+  until: get_url_result.state == 'file'
+  retries: 5
+  delay: 1
+
+- name: Expand to the install directory
+  unarchive: >
+    src={{ download_tmp_dir }}/apache-cassandra-{{ cassandra_version }}-bin.tar.gz
+    dest={{ cassandra_install_dir }}
+    copy=no
+
+- name: Update the owner and group
+  file: >
+    path={{ cassandra_install_dir }}/apache-cassandra-{{ cassandra_version }}
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    state=directory recurse=yes
+
+- name: Create a symbolic link
+  file: path={{ cassandra_link }} src={{ cassandra_install_dir }}/apache-cassandra-{{ cassandra_version }} state=link force=yes
+
+- name: Create the data directory
+  file: >
+    path={{ cassandra_data_root_dir }}
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    mode=0750
+    state=directory
+
+- name: Create the working subdirectories
+  file: >
+    path={{ cassandra_data_root_dir }}/{{ item }}
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    mode=0750
+    state=directory
+  with_items:
+    - data
+    - commitlog
+    - saved_caches
+
+- name: Create local log directory
+  file: >
+    path={{ cassandra_link }}/logs
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    recurse=yes
+    mode=0755
+    state=directory
+
+- name: Link log directory to local log directory
+  file: >
+    src={{ cassandra_link }}/logs
+    dest={{ cassandra_log_dir }}
+    owner={{ cassandra_owner }}
+    group={{ cassandra_group }}
+    state=link
+
+- name: Create accessible links to commands
+  file: >
+    src={{ cassandra_link }}/bin/{{ item }}
+    dest=/usr/bin/{{ item }}
+    owner=root
+    group=root
+    state=link
+  with_items:
+    - cassandra
+    - cqlsh
+    - cqlsh.py
+    - nodetool
+    - debug-cql
+
+- include: _supervise.yml
+- include: _ops_agent.yml
+
+# these are normally in the handlers, but we want execution to happen at this point, not at a later time
+
+- name: reload supervisor on change
+  shell: supervisorctl reread && supervisorctl update
+  when: (supervisor_reload|changed)
+
+- name: restart supervisor on change
+  shell: service supervisor stop && service supervisor start
+  when: (supervisor_restart|changed)

tasks/main.yml

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----
+---
+- include: stop.yml
+  when: run_mode == 'Stop'
+
+- include: install.yml
+  when: not skip_install and ( run_mode == 'Install' or run_mode == 'Deploy' )
+
+- include: configure.yml
+  when: run_mode == 'Configure' or run_mode == 'Deploy'
+
+- include: start.yml
+  when: run_mode == 'Start' or run_mode == 'Deploy'

tasks/start.yml

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+---
+- name: Enable and start cassandra
+  supervisorctl: name=cassandra state=started
+
+- name: wait for cassandra port
+  wait_for: port={{ cassandra_native_transport_port }} host={{ cassandra_bind_address | default('127.0.0.1') }} state=started timeout=180
+  register: first_wait

tasks/stop.yml

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+---
+- name: Stop cassandra
+  supervisorctl: name=cassandra state=stopped