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修改etcd配置文件

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Jimmy Song 2017-04-26 19:35:20 +08:00
parent 77aefbbbed
commit 0876698d3b
1 changed files with 35 additions and 23 deletions
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03-高可用etcd集群.md
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@ -28,13 +28,9 @@ $ sudo mv etcd-v3.1.4-linux-amd64/etcd* /root/local/bin
## 创建 etcd 的 systemd unit 文件
注意替换 `ETCD_NAME` 和 `INTERNAL_IP` 变量的值；
注意替换IP地址为你自己的etcd集群的主机IP。
``` bash
$ export ETCD_NAME=sz-pg-oam-docker-test-001.tendcloud.com
$ export INTERNAL_IP=172.20.0.113
$ sudo mkdir -p /var/lib/etcd /var/lib/etcd
$ cat > etcd.service <<EOF
[Unit]
Description=Etcd Server
After=network.target
@ -46,38 +42,54 @@ Documentation=https://github.com/coreos
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/root/local/bin/etcd \\
--name ${ETCD_NAME} \\
--cert-file=/etc/kubernetes/ssl/kubernetes.pem \\
--key-file=/etc/kubernetes/ssl/kubernetes-key.pem \\
--peer-cert-file=/etc/kubernetes/ssl/kubernetes.pem \\
--peer-key-file=/etc/kubernetes/ssl/kubernetes-key.pem \\
--trusted-ca-file=/etc/kubernetes/ssl/ca.pem \\
--peer-trusted-ca-file=/etc/kubernetes/ssl/ca.pem \\
--initial-advertise-peer-urls https://${INTERNAL_IP}:2380 \\
--listen-peer-urls https://${INTERNAL_IP}:2380 \\
--listen-client-urls https://${INTERNAL_IP}:2379,https://127.0.0.1:2379 \\
--advertise-client-urls https://${INTERNAL_IP}:2379 \\
--initial-cluster-token etcd-cluster-0 \\
--initial-cluster sz-pg-oam-docker-test-001.tendcloud.com=https://172.20.0.113:2380,sz-pg-oam-docker-test-002.tendcloud.com=https://172.20.0.114:2380,sz-pg-oam-docker-test-003.tendcloud.com=https://172.20.0.115:2380 \\
--initial-cluster-state new \\
--data-dir=/var/lib/etcd
ExecStart=/usr/bin/etcd \
--name ${ETCD_NAME} \
--cert-file=/etc/kubernetes/ssl/kubernetes.pem \
--key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
--peer-cert-file=/etc/kubernetes/ssl/kubernetes.pem \
--peer-key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
--trusted-ca-file=/etc/kubernetes/ssl/ca.pem \
--peer-trusted-ca-file=/etc/kubernetes/ssl/ca.pem \
--initial-advertise-peer-urls ${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--listen-peer-urls ${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls ${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls ${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-cluster-token ${ETCD_INITIAL_CLUSTER_TOKEN} \
--initial-cluster infra1=https://172.20.0.113:2380,infra2=https://172.20.0.114:2380,infra3=https://172.20.0.115:2380 \
--initial-cluster-state new \
--data-dir=${ETCD_DATA_DIR}
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
```
+ 指定 `etcd` 的工作目录为 `/var/lib/etcd`，数据目录为 `/var/lib/etcd`，需在启动服务前创建这两个目录；
+ 为了保证通信安全，需要指定 etcd 的公私钥(cert-file和key-file)、Peers 通信的公私钥和 CA 证书(peer-cert-file、peer-key-file、peer-trusted-ca-file)、客户端的CA证书（trusted-ca-file）；
+ 创建 `kubernetes.pem` 证书时使用的 `kubernetes-csr.json` 文件的 `hosts` 字段**包含所有 etcd 节点的 INTERNAL_IP**，否则证书校验会出错；
+ 创建 `kubernetes.pem` 证书时使用的 `kubernetes-csr.json` 文件的 `hosts` 字段**包含所有 etcd 节点的IP**，否则证书校验会出错；
+ `--initial-cluster-state` 值为 `new` 时，`--name` 的参数值必须位于 `--initial-cluster` 列表中；
完整 unit 文件见：[etcd.service](./systemd/etcd.service)
环境变量配置文件`/etc/etcd/etcd.conf`。
```ini
# [member]
ETCD_NAME=infra1
ETCD_DATA_DIR="/var/lib/etcd"
ETCD_LISTEN_PEER_URLS="https://172.20.0.113:2380"
ETCD_LISTEN_CLIENT_URLS="https://172.20.0.113:2379"
#[cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.20.0.113:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="https://172.20.0.113:2379"
```
这是172.20.0.113节点的配置，其他两个etcd节点只要将上面的IP地址改成相应节点的IP地址即可。
## 启动 etcd 服务
``` bash