Merge "Add capability to set node role"

elk_metrics_6x/README.rst

@@ -508,6 +508,56 @@ Overview of kibana custom dashboard
     :align: center
 
 
+Optional | Customize Elasticsearch cluster configuration
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Cluster configuration can be augmented using several variables which will force
+a node to use a given role.
+
+Available roles are *data*, *ingest*, and *master*.
+
+* ``elasticsearch_node_data``:  This variable will override the automatic node
+  determination and set a given node to be an "data" node.
+* ``elasticsearch_node_ingest``: This variable will override the automatic node
+   determination and set a given node to be an "ingest" node.
+* ``elasticsearch_node_master``: This variable will override the automatic node
+   determination and set a given node to be an "master" node.
+
+Example setting override options within inventory.
+
+.. code-block:: yaml
+
+    hosts:
+      children:
+        elastic-logstash:
+          hosts:
+            elk1:
+              ansible_host: 10.0.0.1
+              ansible_user: root
+              elasticsearch_node_master: true
+              elasticsearch_node_data: false
+              elasticsearch_node_ingest: false
+            elk2:
+              ansible_host: 10.0.0.2
+              ansible_user: root
+              elasticsearch_node_master: false
+              elasticsearch_node_data: true
+              elasticsearch_node_ingest: false
+            elk3:
+              ansible_host: 10.0.0.3
+              ansible_user: root
+              elasticsearch_node_master: false
+              elasticsearch_node_data: false
+              elasticsearch_node_ingest: true
+            elk4:
+              ansible_host: 10.0.0.4
+              ansible_user: root
+
+With the following inventory settings **elk1** would be a master node, **elk2**
+would be a data, **elk3** would be an ingest node, and **elk4** would auto
+select a role.
+
+
 Upgrading the cluster
 ---------------------
 

elk_metrics_6x/bootstrap-embedded-ansible.sh

@@ -52,7 +52,7 @@ if [[ ! -d "${ANSIBLE_EMBED_HOME}/repositories/ansible-config_template" ]]; then
   popd
 fi
 
-if [[ ! -d "${ANSIBLE_EMBED_HOME}/repositories/openstack_ansible_plugins" ]]; then
+if [[ ! -d "${ANSIBLE_EMBED_HOME}/repositories/openstack-ansible-plugins" ]]; then
   mkdir -p "${ANSIBLE_EMBED_HOME}/repositories"
   git clone https://git.openstack.org/openstack/openstack-ansible-plugins "${ANSIBLE_EMBED_HOME}/repositories/openstack-ansible-plugins"
   pushd "${ANSIBLE_EMBED_HOME}/repositories/openstack-ansible-plugins"

elk_metrics_6x/roles/elastic_data_hosts/vars/data-node-variables.yml

@@ -21,7 +21,7 @@ storage_node_count: "{{ groups['elastic-logstash'] | length }}"
 # 2 node clusters have 1 master-eligable nodes to avoid split-brain
 # 3 node clusters have 3 master-eligable nodes
 # >3 node clusters have (nodes // 2) eligable masters rounded up to the next odd number
-master_node_count: |-
+elastic_master_node_count: |-
   {% set masters = 0 %}
   {% if (storage_node_count | int) < 3 %}
   {%   set masters = 1 %}
@@ -36,10 +36,76 @@ master_node_count: |-
   {{ masters }}
 
 # Assign node roles
-# the first 'master_node_count' hosts in groups['elastic-logstash'] become master-eligible nodes
-# the first 'master_node_count' and subsequent alternate hosts in groups['elastic-logstash'] becomes data nodes
-data_nodes: "{{ (groups['elastic-logstash'][:master_node_count | int] + groups['elastic-logstash'][master_node_count | int::2]) }}"
-master_nodes: "{{ groups['elastic-logstash'][:master_node_count | int] }}"
+# the first 'elastic_master_node_count' hosts in groups['elastic-logstash'] become master-eligible nodes
+# the first 'elastic_master_node_count' and subsequent alternate hosts in groups['elastic-logstash'] becomes data nodes
+## While the data node group is dynamically chosen the override
+## `elasticsearch_node_data` can be used to override the node type.
+## Dynamic node inclusion will still work for all other nodes in the group.
+_data_nodes: "{{ (groups['elastic-logstash'][:elastic_master_node_count | int] | union(groups['elastic-logstash'][elastic_master_node_count | int::2])) }}"
+data_nodes: |-
+  {% set nodes = [] %}
+  {% for node in groups['elastic-logstash'] %}
+  {%   if (hostvars[node]['elasticsearch_node_data'] is defined) and (hostvars[node]['elasticsearch_node_data'] | bool) %}
+  {%     set _ = nodes.append(node) %}
+  {%   elif (node in _data_nodes) %}
+  {%     set _ = nodes.append(node) %}
+  {%   endif %}
+  {% endfor %}
+  {{ nodes }}
+
+## While the logstash node group is dynamically chosen the override
+## `elasticsearch_node_ingest` can be used to override the node type.
+## Dynamic node inclusion will still work for all other nodes in the group.
+_logstash_nodes: "{{ data_nodes }}"
+logstash_nodes: |-
+  {% set nodes = [] %}
+  {% for node in groups['elastic-logstash'] %}
+  {%   if (hostvars[node]['elasticsearch_node_ingest'] is defined) and (hostvars[node]['elasticsearch_node_ingest'] | bool) %}
+  {%     set _ = nodes.append(node) %}
+  {%   elif (node in _logstash_nodes) %}
+  {%     set _ = nodes.append(node) %}
+  {%   endif %}
+  {% endfor %}
+  {{ nodes }}
+
+## While the logstash node group is dynamically chosen the override
+## `elasticsearch_node_ingest` can be used to override the node type.
+## Dynamic node inclusion will still work for all other nodes in the group.
+_ingest_nodes: "{{ data_nodes }}"
+ingest_nodes: |-
+  {% set nodes = [] %}
+  {% for node in groups['elastic-logstash'] %}
+  {%   if (hostvars[node]['elasticsearch_node_ingest'] is defined) and (hostvars[node]['elasticsearch_node_ingest'] | bool) %}
+  {%     set _ = nodes.append(node) %}
+  {%   elif (node in _ingest_nodes) %}
+  {%     set _ = nodes.append(node) %}
+  {%   endif %}
+  {% endfor %}
+  {{ nodes }}
+
+## While the master node group is dynamically chosen the override
+## `elasticsearch_node_master` can be used to override the node type.
+## Dynamic node inclusion will still work for all other nodes in the group.
+_master_nodes: "{{ groups['elastic-logstash'][:elastic_master_node_count | int] }}"
+master_nodes: |-
+  {% set nodes = [] %}
+  {% for node in groups['elastic-logstash'] %}
+  {%   if (nodes | length) <= (elastic_master_node_count | int) %}
+  {%     if (hostvars[node]['elasticsearch_node_master'] is defined) and (hostvars[node]['elasticsearch_node_master'] | bool) %}
+  {%       set _ = nodes.append(node) %}
+  {%     endif %}
+  {%   endif %}
+  {% endfor %}
+  {% for node in groups['elastic-logstash'] %}
+  {%   if (nodes | length) <= (elastic_master_node_count | int) %}
+  {%     if (node in _master_nodes) %}
+  {%       set _ = nodes.append(node) %}
+  {%     endif %}
+  {%   endif %}
+  {% endfor %}
+  {{ nodes }}
+master_node_count: "{{ master_nodes | length }}"
+
 coordination_nodes: >-
   {{
     (groups['kibana'] | map('extract', hostvars, 'ansible_host') | list)
@@ -90,7 +156,7 @@ elasticsearch_data_node_details: >-
   }}
 logstash_data_node_details: >-
   {{
-    (data_nodes | map('extract', hostvars, 'ansible_host') | list) | map('regex_replace', '(.*)' ,'\1:' ~ logstash_beat_input_port) | list
+    (logstash_nodes | map('extract', hostvars, 'ansible_host') | list) | map('regex_replace', '(.*)' ,'\1:' ~ logstash_beat_input_port) | list
   }}
 
 # based on the assignment of roles to hosts, set per host booleans
@@ -105,16 +171,14 @@ elastic_thread_pool_size: "{{ ((ansible_processor_count | int) >= 24) | ternary(
 # ingest nodes.
 elasticsearch_number_of_replicas: "{{ ((data_nodes | length) > 2) | ternary('2', ((data_nodes | length) > 1) | ternary('1', '0')) }}"
 elasticsearch_data_hosts: |-
-  {% set nodes = elasticsearch_data_node_details %}
-  {% set data_hosts = nodes | shuffle(seed=inventory_hostname) %}
+  {% set data_hosts = elasticsearch_data_node_details | shuffle(seed=inventory_hostname) %}
   {% if inventory_hostname in data_nodes %}
-  {%   set _ = nodes.insert(0, '127.0.0.1:' ~ elastic_port) %}
+  {%   set _ = data_hosts.insert(0, '127.0.0.1:' ~ elastic_port) %}
   {% endif %}
   {{ data_hosts }}
 logstash_data_hosts: |-
-  {% set nodes = logstash_data_node_details %}
-  {% set data_hosts = nodes | shuffle(seed=inventory_hostname) %}
+  {% set data_hosts = logstash_data_node_details | shuffle(seed=inventory_hostname) %}
   {% if inventory_hostname in data_nodes %}
-  {%   set _ = nodes.insert(0, '127.0.0.1:' ~ logstash_beat_input_port) %}
+  {%   set _ = data_hosts.insert(0, '127.0.0.1:' ~ logstash_beat_input_port) %}
   {% endif %}
   {{ data_hosts }}

elk_metrics_6x/roles/elastic_dependencies/templates/jvm.options.j2

@@ -8,7 +8,8 @@
 -Xms{{ heap_size }}m
 # Xmx represents the maximum size of total heap space
 -Xmx{{ heap_size }}m
-
+# Sets the thread stack size
+-Xss1m
 
 ################################################################
 ## Expert settings

elk_metrics_6x/roles/elastic_logstash/handlers/main.yml

@@ -17,7 +17,7 @@
   systemd:
     name: "logstash"
     enabled: true
-    state: restarted
+    state: "{{ (inventory_hostname in logstash_nodes) | ternary('restarted', 'stopped') }}"
     daemon_reload: true
   when:
     - ansible_service_mgr == 'systemd'
@@ -26,7 +26,7 @@
 - name: Enable and restart logstash (upstart)
   service:
     name: "logstash"
-    state: restarted
+    state: "{{ (inventory_hostname in logstash_nodes) | ternary('restarted', 'stopped') }}"
     enabled: yes
   when:
     - ansible_service_mgr == 'upstart'

elk_metrics_6x/roles/elastic_logstash/templates/logstash.yml.j2

@@ -231,14 +231,14 @@ path.logs: /var/log/logstash
 xpack.monitoring.enabled: true
 #xpack.monitoring.elasticsearch.username: logstash_system
 #xpack.monitoring.elasticsearch.password: password
-#xpack.monitoring.elasticsearch.url: ["https://es1:9200", "https://es2:9200"]
+xpack.monitoring.elasticsearch.url: ["127.0.0.1:9200"]
 #xpack.monitoring.elasticsearch.ssl.ca: [ "/path/to/ca.crt" ]
 #xpack.monitoring.elasticsearch.ssl.truststore.path: path/to/file
 #xpack.monitoring.elasticsearch.ssl.truststore.password: password
 #xpack.monitoring.elasticsearch.ssl.keystore.path: /path/to/file
 #xpack.monitoring.elasticsearch.ssl.keystore.password: password
 #xpack.monitoring.elasticsearch.ssl.verification_mode: certificate
-#xpack.monitoring.elasticsearch.sniffing: false
+xpack.monitoring.elasticsearch.sniffing: false
 xpack.monitoring.collection.interval: 30s
 xpack.monitoring.collection.pipeline.details.enabled: true
 #

elk_metrics_6x/roles/elasticsearch/templates/systemd.elasticsearch-overrides.conf.j2

@@ -11,4 +11,4 @@ LimitMEMLOCK=infinity
 {% endif %}
 
 # Number of File Descriptors
-LimitNOFILE=131070
+LimitNOFILE=65536