如何在docker中运行etcd集群使用ansible？

我试图在docker中通过ansible运行etcd集群。

我使用docker_container ansible模块，这是我所拥有的：

- name: Run etcd KV node docker_container: name: "etcd0" image: quay.io/coreos/etcd network_mode: host command: [ "/usr/local/bin/etcd", \ "-name etcd0", \ "-advertise-client-urls http://{{ ansible_default_ipv4['address'] }}:2379,http://{{ ansible_default_ipv4['address'] }}:4001", \ "-listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001", \ "-initial-advertise-peer-urls http://{{ ansible_default_ipv4['address'] }}:2380", \ "-initial-cluster etcd0=http://{{ ansible_default_ipv4['address'] }}:2380", \ "-initial-cluster-token etcd-cluster", \ "-listen-peer-urls http://0.0.0.0:2380", \ "-initial-cluster-state new" ] 

这个工作在单一模式下，但是由于有etcd参数-initial-cluster应该包含所有节点，例如在3个节点的情况下，多于1个节点出现问题：

 -initial-cluster etcd0=http://192.168.12.50:2380,etcd1=http://192.168.12.51:2380,etcd2=http://192.168.12.52:2380 

我不知道如何循环通过所有节点，并build立这个string运行一个docker集装箱。 可能吗？

Answer 1

主机变魔术在您的服务：

 - name: Generate useful facts for current node 1 set_fact: ip_addr: "{{ ansible_default_ipv4.address }}" etcd_name: "etcd{{ ansible_play_hosts.index(inventory_hostname) }}" - name: Generate useful facts for current node 2 set_fact: etcd_uri: "{{ etcd_name }}=http://{{ ip_addr }}:2380" - name: Run etcd KV node docker_container: name: "{{ etcd_name }}" image: quay.io/coreos/etcd network_mode: host command: - /usr/local/bin/etcd - -name {{ etcd_name }} - -advertise-client-urls http://{{ ip_addr }}:2379,http://{{ ip_addr }}:4001 - -listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 - -initial-advertise-peer-urls http://{{ ip_addr }}:2380 - -initial-cluster {{ ansible_play_hosts | map('extract',hostvars,'etcd_uri') | list | join(',') }} - -initial-cluster-token etcd-cluster - -listen-peer-urls http://0.0.0.0:2380 - -initial-cluster-state new 

PS我也重新格式化了一下你的command参数。