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--- | |
- hosts: elasticsearch | |
serial: 1 | |
user: ubuntu | |
# First we make sure the cluster is not in a weird state before we begin rebooting | |
# That would be bad. | |
# We turn on sharding, making sure all nodes are "in sync" with each other | |
pre_tasks: | |
- name: Turn on the sharding from the {{ansible_hostname}} | |
shell: "curl -H 'Content-Type: application/json' -XPUT {{ ansible_ssh_host }}:9200/_cluster/settings -d '{ \"transient\" : { \"cluster.routing.allocation.enable\" : \"all\" }}'" | |
register: result | |
until: result.stdout.find("acknowledged") != -1 | |
retries: 200 | |
delay: 3 | |
changed_when: result.stdout.find('"acknowledged":true') != -1 | |
run_once: true | |
# Here we wait until the cluster is indeed synched if the precious command turned sharding | |
# "on" from a previous "off" state. | |
- name: Wait for cluster to be green before we begin | |
shell: curl -s -m 2 {{ ansible_ssh_host }}:9200/_cat/health | cut -d ' ' -f 4 | |
register: result | |
until: result.stdout.find("green") != -1 | |
retries: 200 | |
delay: 3 | |
tasks: | |
# Right! Before we begin a reboot, first check if the cluster is green | |
- name: Wait for cluster to be green before we begin | |
shell: curl -s -m 2 {{ ansible_ssh_host }}:9200/_cat/health | cut -d ' ' -f 4 | |
register: result | |
until: result.stdout.find("green") != -1 | |
retries: 200 | |
delay: 3 | |
# Now we turn off sharding, because we are not replacing a node, merely rebooting it. | |
# This way the nodes that are still live don't start redistributing their stuff thinking | |
# our node died! | |
- name: Turn off sharding from the {{ansible_hostname}} | |
shell: "curl -H 'Content-Type: application/json' -XPUT {{ ansible_ssh_host }}:9200/_cluster/settings -d '{ \"transient\" : { \"cluster.routing.allocation.enable\" : \"none\" }}'" | |
register: result | |
until: result.stdout.find('"acknowledged"') != -1 | |
retries: 200 | |
delay: 3 | |
changed_when: result.stdout.find('"acknowledged":true') != -1 | |
warn: false | |
- name: Reboot the {{ansible_hostname}} | |
shell: "sleep 5 && reboot" | |
async: 1 | |
poll: 0 | |
- name: Wait 600 seconds for target connection to become reachable/usable | |
wait_for_connection: | |
connect_timeout: 20 | |
sleep: 5 | |
delay: 30 | |
timeout: 600 | |
- name: Can I connect to the ElasticSearch port from localhost? | |
wait_for: | |
state: present | |
port: 9200 | |
delay: 0 | |
sleep: 10 | |
host: '{{ (ansible_ssh_host|default(ansible_host))|default(inventory_hostname) }}' | |
# Let's see if the node can see itself in the cluster | |
- name: Wait for node "{{ansible_hostname}}" to be in the cluster again. | |
shell: "curl -s -m 2 '{{ ansible_ssh_host }}:9200/_cat/nodes?h=name' | tr -d ' ' | grep -E '^{{ansible_hostname}}$' " | |
register: result | |
until: result.rc == 0 | |
retries: 200 | |
delay: 3 | |
# If so, turn the sharding back on, so we can actually, really join! | |
- name: Turn on the sharding from the {{ansible_hostname}} | |
shell: "curl -H 'Content-Type: application/json' -XPUT {{ ansible_ssh_host }}:9200/_cluster/settings -d '{ \"transient\" : { \"cluster.routing.allocation.enable\" : \"all\" }}'" | |
register: result | |
until: result.stdout.find("acknowledged") != -1 | |
retries: 200 | |
delay: 3 | |
changed_when: result.stdout.find('"acknowledged":true') != -1 | |
run_once: true | |
# It's just good manners to make sure we are green again, before continuing. | |
- name: Wait for cluster to be green again | |
shell: curl -s -m 2 {{ ansible_ssh_host }}:9200/_cat/health | cut -d ' ' -f 4 | |
register: result | |
until: result.stdout.find("green") != -1 | |
retries: 200 | |
delay: 3 |
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