1

I am using core-os and configuring it with cloud-config files. I need to use a etcd-service for my application.

This is the relevant part of the cloud-config file. 

- name: etcd.service
  command: start
  content: |
    [Unit]
    Description=etcd
    Requires=setup-network-environment.service
    After=setup-network-environment.service

    [Service]
    EnvironmentFile=/etc/network-environment
    User=etcd
    PermissionsStartOnly=true
    ExecStart=/usr/bin/etcd \
    --name ${DEFAULT_IPV4} \
    --addr ${DEFAULT_IPV4}:4001 \
    --bind-addr 0.0.0.0 \
    --discovery https://discovery.etcd.io/SOMEKEY \
    --data-dir /var/lib/etcd \
    --http-read-timeout 86400 \
    --peer-addr ${DEFAULT_IPV4}:7001 \
    --snapshot true
    Restart=always
    RestartSec=10s

I am not sure how to update the version of etcd.

4

3 回答 3

1

原来 etcd2 已经安装在 coreos 上。它目前与 etcd 一起在 coreos-alpha 653 版本中发布。要在云配置中更改它，您只需更改

ExecStart=/usr/bin/etcd

至

ExecStart=/usr/bin/etcd2

并删除一些在 etcd2 中已弃用的标志。

于 2015-04-22T15:31:01.853 回答
0

我有一个模板生成器，我可以通过设置一个环境变量来告诉它在 etcd 和 etcd2 之间切换。我做的一件事是使用 etcd2.service 名称或 etcd.service（我不只是将 etcd2 配置放在 etcd 单元部分）。这可能可行，但是，您可能会考虑将文件中的所有 etcd.service 引用更改为 etcd2.service。无论如何，这里是 etcd2 的 ExecStart 部分：

    ExecStart=/usr/bin/etcd2 \
    --name ${d['etcd']['name']} \
    --advertise-client-urls ${d['etcd']['advertise-client-urls']} \
    --discovery ${d['etcd']['discovery']} \
    --data-dir /var/lib/etcd \
    --initial-advertise-peer-urls ${d['etcd']['initial-advertise-peer-urls']} \
    --listen-client-urls ${d['etcd']['listen-client-urls']} \
    --listen-peer-urls ${d['etcd']['listen-peer-urls']}

这是我的 d['etcd'] 环境变量：

"etcd": {
    "mver":"etcd2.service",
    "discovery":"http://discovery.etcd.io/SOMEKEY",
    "addr":"$private_ipv4:4001",
    "name":"$private_ipv4",
    "peer-addr":"$private_ipv4:7001",
    "advertise-client-urls":"http://$private_ipv4:2379",
    "initial-advertise-peer-urls":"http://$private_ipv4:2380",
    "listen-client-urls":"http://0.0.0.0:2379,http://0.0.0.0:4001",
    "listen-peer-urls":"http://$private_ipv4:2380,http://$private_ipv4:7001"
}

我记得在某处读到，其中一个变量需要 $public_ipv4，也就是说，我只是为所有这些变量使用了私有 ip。我这里的环境是数字海洋。请务必使用 coreos-alpha（至少我认为在撰写本文时仍需要这样做）。

于 2015-04-22T14:38:55.700 回答
0

cloud-config 解析器内置了对 etcd2 和新配置参数的支持：https ://coreos.com/docs/cluster-management/setup/cloudinit-cloud-config/#etcd2

一个例子：

#cloud-config

coreos:
  etcd2:
    # generate a new token for each unique cluster from https://discovery.etcd.io/new?size=3
    discovery: https://discovery.etcd.io/<token>
    # multi-region and multi-cloud deployments need to use $public_ipv4
    advertise-client-urls: http://$public_ipv4:2379
    initial-advertise-peer-urls: http://$private_ipv4:2380
    # listen on both the official ports and the legacy ports
    # legacy ports can be omitted if your application doesn't depend on them
    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
    listen-peer-urls: http://$private_ipv4:2380,http://$private_ipv4:7001
于 2015-04-23T17:07:50.883 回答