本文主要是介绍ansible 安装etcd，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

分组配置-/etc/ansible/hosts

[platform-etcd]
172.24.31.22 hostname=platform-etcd-3 ansible_ssh_user=root ansible_ssh_private_key_file=/xx.pem ansible_become=true ansible_become_user=root
172.24.31.24 hostname=platform-etcd-2 ansible_ssh_user=root ansible_ssh_private_key_file=/xx.pem ansible_become=true ansible_become_user=root
172.24.31.25 hostname=platform-etcd-1 ansible_ssh_user=root ansible_ssh_private_key_file=/xx.pem ansible_become=true ansible_become_user=root

playbook

---
- hosts: platform-etcd
  gather_facts: False
  vars:
    name1: etcd1
    name2: etcd2
    name3: etcd3
    etcd1: 172.24.31.25
    etcd2: 172.24.31.24
    etcd3: 172.24.31.22
    data_dir: /home/service/app/etcd-v3.4.14-linux-amd64/default.etcd
  roles:
    - platform-etcd-cluster

roles

tasks

main.yml

---
- name: wget etcd
  command: wget https://github.com/etcd-io/etcd/releases/download/v3.4.14/etcd-v3.4.14-linux-amd64.tar.gz

- name: tar.gz
  command: tar -zxvf etcd-v3.4.14-linux-amd64.tar.gz -C /home/service/app

- name: copy etcd config to etcd1
  template: src=etcd.conf.yml-etcd1.j2 dest=/home/service/app/etcd-v3.4.14-linux-amd64/etcd.conf.yml
  when: hostname=="platform-etcd-1"

- name: copy etcd config to etcd2
  template: src=etcd.conf.yml-etcd2.j2 dest=/home/service/app/etcd-v3.4.14-linux-amd64/etcd.conf.yml
  when: hostname=="platform-etcd-2"

- name: copy etcd config to etcd3
  template: src=etcd.conf.yml-etcd3.j2 dest=/home/service/app/etcd-v3.4.14-linux-amd64/etcd.conf.yml
  when: hostname=="platform-etcd-3"

- name: copy start.sh
  template: src=start.sh.j2 dest=/home/service/app/etcd-v3.4.14-linux-amd64/start.sh mode=755

#start 脚本似乎没用，我是手动执行脚本才生效~
#- name: start etcd
#  command: sh /home/service/app/etcd-v3.4.14-linux-amd64/start.sh

templates

三个配置文件其实内容一样，只是变量的区别。懒得写判断了。（我笑了，其实是不会写判断）

这里参数不清楚的可以查看我的v3.4的配置文件，照着官网谷歌翻译的。。。

传送门：etcd v3.4-configuration flags

etcd.conf.yml-etcd1.j2

# This is the configuration file for the etcd server.

# Human-readable name for this member.
name: {{ name1 }}

# Path to the data directory.
data-dir: {{ data_dir }}

# Number of committed transactions to trigger a snapshot to disk.
snapshot-count: 10000

# Time (in milliseconds) of a heartbeat interval.
heartbeat-interval: 100

# Time (in milliseconds) for an election to timeout.
election-timeout: 1000

# Raise alarms when backend size exceeds the given quota. 0 means use the
# default quota.
quota-backend-bytes: 8589934592

# List of comma separated URLs to listen on for peer traffic.
listen-peer-urls: http://{{ etcd1 }}:2380

# List of comma separated URLs to listen on for client traffic.
listen-client-urls: http://{{ etcd1 }}:2379,http://127.0.0.1:2379

# List of this member's peer URLs to advertise to the rest of the cluster.
# The URLs needed to be a comma-separated list.
initial-advertise-peer-urls: http://{{ etcd1 }}:2380

# List of this member's client URLs to advertise to the public.
# The URLs needed to be a comma-separated list.
advertise-client-urls: http://{{ etcd1 }}:2379

# Initial cluster configuration for bootstrapping.
initial-cluster: etcd1=http://172.24.31.25:2380,etcd2=http://172.24.31.24:2380,etcd3=http://172.24.31.22:2380

# Initial cluster token for the etcd cluster during bootstrap.
initial-cluster-token: 'etcd-cluster'

# Initial cluster state ('new' or 'existing').
initial-cluster-state: 'new'

logger: zap

auto-compaction-retention: '1'

max-request-bytes: 33554432

log-level: debug

etcd.conf.yml-etcd2.j2

# This is the configuration file for the etcd server.

# Human-readable name for this member.
name: {{ name2 }}

# Path to the data directory.
data-dir: {{ data_dir }}

# Number of committed transactions to trigger a snapshot to disk.
snapshot-count: 10000

# Time (in milliseconds) of a heartbeat interval.
heartbeat-interval: 100

# Time (in milliseconds) for an election to timeout.
election-timeout: 1000

# Raise alarms when backend size exceeds the given quota. 0 means use the
# default quota.
quota-backend-bytes: 8589934592

# List of comma separated URLs to listen on for peer traffic.
listen-peer-urls: http://{{ etcd2 }}:2380

# List of comma separated URLs to listen on for client traffic.
listen-client-urls: http://{{ etcd2 }}:2379,http://127.0.0.1:2379

# List of this member's peer URLs to advertise to the rest of the cluster.
# The URLs needed to be a comma-separated list.
initial-advertise-peer-urls: http://{{ etcd2 }}:2380

# List of this member's client URLs to advertise to the public.
# The URLs needed to be a comma-separated list.
advertise-client-urls: http://{{ etcd2 }}:2379

# Initial cluster configuration for bootstrapping.
initial-cluster: etcd1=http://172.24.31.25:2380,etcd2=http://172.24.31.24:2380,etcd3=http://172.24.31.22:2380

# Initial cluster token for the etcd cluster during bootstrap.
initial-cluster-token: 'etcd-cluster'

# Initial cluster state ('new' or 'existing').
initial-cluster-state: 'new'

logger: zap

auto-compaction-retention: '1'

max-request-bytes: 33554432

log-level: debug

etcd.conf.yml-etcd3.j2

# This is the configuration file for the etcd server.

# Human-readable name for this member.
name: {{ name3 }}

# Path to the data directory.
data-dir: {{ data_dir }}

# Number of committed transactions to trigger a snapshot to disk.
snapshot-count: 10000

# Time (in milliseconds) of a heartbeat interval.
heartbeat-interval: 100

# Time (in milliseconds) for an election to timeout.
election-timeout: 1000

# Raise alarms when backend size exceeds the given quota. 0 means use the
# default quota.
quota-backend-bytes: 8589934592

# List of comma separated URLs to listen on for peer traffic.
listen-peer-urls: http://{{ etcd3 }}:2380

# List of comma separated URLs to listen on for client traffic.
listen-client-urls: http://{{ etcd3 }}:2379,http://127.0.0.1:2379

# List of this member's peer URLs to advertise to the rest of the cluster.
# The URLs needed to be a comma-separated list.
initial-advertise-peer-urls: http://{{ etcd3 }}:2380

# List of this member's client URLs to advertise to the public.
# The URLs needed to be a comma-separated list.
advertise-client-urls: http://{{ etcd3 }}:2379

# Initial cluster configuration for bootstrapping.
initial-cluster: etcd1=http://172.24.31.25:2380,etcd2=http://172.24.31.24:2380,etcd3=http://172.24.31.22:2380

# Initial cluster token for the etcd cluster during bootstrap.
initial-cluster-token: 'etcd-cluster'

# Initial cluster state ('new' or 'existing').
initial-cluster-state: 'new'

logger: zap

auto-compaction-retention: '1'

max-request-bytes: 33554432

log-level: debug

start.sh.j2

使用--config-file指定配置文件启动etcd。这样就可以不用每次启动都在命令行中写很多的flags。

nohup /home/service/app/etcd-v3.4.14-linux-amd64/etcd \
--config-file=/home/service/app/etcd-v3.4.14-linux-amd64/etcd.conf.yml \
&

执行效果

我是执行了好几次，所以前面安装的task我注释掉了。

命令查看集群状态

[root@cnhydabpdc0e-31-25 etcd-v3.4.14-linux-amd64]# ./etcdctl version
etcdctl version: 3.4.14
API version: 3.4

[root@cnhydabpdc0e-31-25 etcd-v3.4.14-linux-amd64]# ./etcdctl --endpoints=172.24.31.25:2379 member list
7015b0cc1bec8639, started, etcd1, http://172.24.31.25:2380, http://172.24.31.25:2379, false
b6bd8889d6452725, started, etcd2, http://172.24.31.24:2380, http://172.24.31.24:2379, false
bfe8c4af74b4db8f, started, etcd3, http://172.24.31.22:2380, http://172.24.31.22:2379, false

[root@cnhydabpdc0e-31-25 etcd-v3.4.14-linux-amd64]# ./etcdctl --endpoints=172.24.31.25:2379,172.24.31.24:2379,172.24.31.22:2379 endpoint status --write-out=table
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|     ENDPOINT      |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 172.24.31.25:2379 | 7015b0cc1bec8639 |  3.4.14 |   20 kB |     false |      false |        51 |         10 |                 10 |        |
| 172.24.31.24:2379 | b6bd8889d6452725 |  3.4.14 |   20 kB |      true |      false |        51 |         10 |                 10 |        |
| 172.24.31.22:2379 | bfe8c4af74b4db8f |  3.4.14 |   20 kB |     false |      false |        51 |         10 |                 10 |        |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+

附上个创建角色

./etcdctl --endpoints=http://127.0.0.1:2379 user add root:etcd
./etcdctl --endpoints=http://127.0.0.1:2379 role add root
./etcdctl --endpoints=http://127.0.0.1:2379 user grant-role root root
./etcdctl --endpoints=http://127.0.0.1:2379 user list
./etcdctl --endpoints=http://127.0.0.1:2379 role list
./etcdctl --endpoints=http://127.0.0.1:2379 auth enable

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