2、二進制安裝K8s 之 部署ETCD集群

二進制安裝K8s 之 部署ETCD集群

一、下載安裝cfssl，用於k8s證書簽名

二進制包地址:https://pkg.cfssl.org/
所需軟件包：

• cfssl 1.6.0
• cfssljson 1.6.0
• cfssl-certinfo 1.6.0

wget https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssl_1.6.0_linux_amd64 -O cfssl
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssljson_1.6.0_linux_amd64 -O cfssljson
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssl-certinfo_1.6.0_linux_amd64 -O cfssl-certinfo

chmod +x cfssl*
mv cfssl* /usr/local/bin/

2、生成etcd證書

• [x] 自簽CA:

#生成默認的證書配置文件【可以省略此步驟】,如果沒有證書配置文件模板可以使用

cfssl  print-defaults  config >ca-config.json
cfssl print-defaults csr >ca-csr.json

• [x] 修改證書

cat > ca-config.json <<EOF
{
    "signing": {
        "default": {
            "expiry": "87600h"
        },
        "profiles": {
            "www": {
                "expiry": "87600h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth",
                    "client auth"
                ]
            }
        }
    }
}
EOF

cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

• [x] 生成證書

生成ca.pem ca-key.pem 根證書文件

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

• [x] 使用自簽CA簽發Etcd HTTPS證書
  創建證書申請文件：

#注：上述文件hosts字段中IP為所有etcd節點的集群內部通信IP，一個都不能少！為了方便后期擴容可以多寫幾個預留的IP。
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
      "192.168.100.170",
      "192.168.100.171",
      "192.168.100.172",
      "192.168.100.173"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

# 生成域名證書 server-key.pem server.pem
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

---

3、下載安裝etcd

• [x] 下載二進制包

#下載
wget https://github.com/etcd-io/etcd/releases/download/v3.5.0/etcd-v3.5.0-linux-amd64.tar.gz -O /data/download/

#解壓
tar -zxvf etcd-v3.5.0-linux-amd64.tar.gz

#建議復制到/usr/local/bin/ 目錄下

mv /data/download/etcd-v3.5.0-linux-amd64/{etcd,etcdctl} /usr/local/bin/
mv /data/download/etcd-v3.5.0-linux-amd64/{etcd,etcdctl} /data/k8s/etcd/bin/

• [x] 創建etcd配置文件

cat > /data/etcd/config/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.100.170:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.100.170:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.100.170:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.100.170:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.100.170:2380,etcd-2=https://192.168.100.171:2380,etcd-3=https://192.168.100.172:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

• [x] 3、systemd管理etcd

注意證書路徑

cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/data/etcd/config/etcd.conf
ExecStart=/usr/local/bin/etcd \
--cert-file=/data/etcd/ssl/server.pem \
--key-file=/data/etcd/ssl/server-key.pem \
--peer-cert-file=/data/etcd/ssl/server.pem \
--peer-key-file=/data/etcd/ssl/server-key.pem \
--trusted-ca-file=/data/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/data/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF

• [x] 4、拷貝剛才生成的證書

把剛才生成的證書拷貝到配置文件中的路徑：

cp /data/docker/TSL/etcd/*.pem /data/etcd/ssl/

• [x] 5、啟動並設置開機啟動

systemctl daemon-reload
systemctl enable etcd
systemctl start etcd

6 、將上面節點1所有生成的文件拷貝到節點2和節點3

#復制整個目錄
scp -r /data/etcd/* root@192.168.100.171:/data/etcd/
scp -r /data/etcd/* root@192.168.100.172:/data/etcd/

#復制systemd文件
scp /usr/lib/systemd/system/etcd.service root@192.168.100.171:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/etcd.service root@192.168.100.172:/usr/lib/systemd/system/

#cp etcd 二進制文件 集群其他機器上操作
cp /data/etcd/bin/etc* /usr/local/bin/

#然后在節點2和節點3分別修改etcd.conf配置文件中的節點名稱和當前服務器IP：

vi /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-1"   # 修改此處，節點2改為etcd-2，節點3改為etcd-3
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.100.71:2380"   # 修改此處為當前服務器IP
ETCD_LISTEN_CLIENT_URLS="https://192.168.100.71:2379" # 修改此處為當前服務器IP
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.100.71:2380" # 修改此處為當前服務器IP
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.100.71:2379" # 修改此處為當前服務器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.100.71:2380,etcd-2=https://192.168.31.72:2380,etcd-3=https://192.168.31.73:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

#啟動，並設置開始啟動
systemctl daemon-reload
systemctl enable etcd
systemctl start etcd

7、查看集群狀態

systemctl status  etcd

● etcd.service - Etcd Server
   Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
   Active: active (running) since 日 2021-07-18 19:04:49 CST; 18s ago
 Main PID: 1875 (etcd)
    Tasks: 8
   Memory: 33.5M
   CGroup: /system.slice/etcd.service
           └─1875 /usr/local/bin/etcd --cert-file=/data/k8s/etcd/ssl/server.pem --key-file=/data/k8s/etcd/ssl/server-key.pem --peer-cert-file=/data/k8s/etcd/ssl/server.pem --peer-key-file=/data/k8s/etcd/ssl/serve...

7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.863+0800","caller":"rafthttp/peer_status.go:53","msg":"peer became active","peer-id":"1bd67ef396fd86"}
7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.864+0800","caller":"rafthttp/stream.go:412","msg":"established TCP streaming connection with remote peer","stream-rea...bd67ef396fd86"}
7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.865+0800","caller":"rafthttp/stream.go:412","msg":"established TCP streaming connection with remote peer","stream-rea...bd67ef396fd86"}
7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.866+0800","caller":"rafthttp/stream.go:249","msg":"set message encoder","from":"7f0b6bf57639838f","to":"1bd67ef396fd8...eam MsgApp v2"}
7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.866+0800","caller":"rafthttp/stream.go:274","msg":"established TCP streaming connection with remote peer","stream-wri...bd67ef396fd86"}
7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.899+0800","caller":"rafthttp/stream.go:249","msg":"set message encoder","from":"7f0b6bf57639838f","to":"1bd67ef396fd8...tream Message"}
7月 18 19:04:51 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:51.899+0800","caller":"rafthttp/stream.go:274","msg":"established TCP streaming connection with remote peer","stream-wri...bd67ef396fd86"}
7月 18 19:04:53 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:53.988+0800","caller":"etcdserver/server.go:2481","msg":"updating cluster version using v2 API","from":"3.0","to":"3.5"}
7月 18 19:04:53 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:53.991+0800","caller":"membership/cluster.go:523","msg":"updated cluster version","cluster-id":"a89a4473c024c0a2","local....0","to":"3.5"}
7月 18 19:04:53 master01 etcd[1875]: {"level":"info","ts":"2021-07-18T19:04:53.991+0800","caller":"etcdserver/server.go:2500","msg":"cluster version is updated","cluster-version":"3.5"}
Hint: Some lines were ellipsized, use -l to show in full.

etcdctl --cacert=/data/etcd/ssl/ca.pem \
--cert=/data/etcd/ssl/server.pem \
--key=/data/etcd/ssl/server-key.pem \
--endpoints="https://192.168.0.170:2379,https://192.168.100.171:2379,https://192.168.100.172:2379"  endpoint status -w table

etcdctl --cacert=/data/etcd/ssl/ca.pem \
--cert=/data/etcd/ssl/server.pem \
--key=/data/etcd/ssl/server-key.pem \
--endpoints="https://192.168.100.170:2379,https://192.168.100.171:2379,https://192.168.100.172:2379"  endpoint health


+----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|          ENDPOINT          |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://192.168.100.170:2379 |  32e07c4d987eefc |   3.5.0 |   29 kB |      true |      false |         2 |          9 |                  9 |        |
| https://192.168.100.171:2379 | 7ec2542a2723e9e3 |   3.5.0 |   20 kB |     false |      false |         2 |          9 |                  9 |        |
| https://192.168.100.172:2379 | 2186647c238c4402 |   3.5.0 |   20 kB |     false |      false |         2 |          9 |                  9 |        |
+----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
https://192.168.100.170:2379 is healthy: successfully committed proposal: took = 32.498535ms
https://192.168.100.171:2379 is healthy: successfully committed proposal: took = 37.070854ms
https://192.168.100.172:2379 is healthy: successfully committed proposal: took = 37.475938ms
#如果輸出上面信息，就說明集群部署成功。如果有問題第一步先看日志：/var/log/message 或 journalctl -u etcd