CentOS8 Nomad安装（2）
2024-05-13 13:51:21
1 环境
操作系统版本：centos8
系统工具：yum
默认启用端口：4646、4647、4648
2 下载 安装
wget https://releases.hashicorp.com/nomad/0.6.1/nomad_0.6.1_linux_amd64.zip--2022-04-18 10:08:10-- https://releases.hashicorp.com/nomad/0.6.1/nomad_0.6.1_linux_amd64.zip
Resolving releases.hashicorp.com (releases.hashicorp.com)... 151.101.109.183, 2a04:4e42:11::439
Connecting to releases.hashicorp.com (releases.hashicorp.com)|151.101.109.183|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 10577708 (10M) [application/zip]
Saving to: ‘nomad_0.6.1_linux_amd64.zip’nomad_0.6.1_linux_amd64.zip 100%[==================================================================================================================>] 10.09M 6.18MB/s in 1.6s2022-04-18 10:08:12 (6.18 MB/s) - ‘nomad_0.6.1_linux_amd64.zip’ saved [10577708/10577708]#解压
unzip nomad_0.6.1_linux_amd64.zip -d /usr/binArchive: nomad_0.6.1_linux_amd64.zipinflating: /usr/bin/nomad
3 创建启动文件
vim /lib/systemd/system/nomad.service[Unit]
Description=nomad
[Service]
ExecStart=/usr/bin/nomad agent -config /etc/nomad
killSignal=SIGTERM:wq
4 开始
#开发者模式
nomad agent -devNo configuration files loaded
==> Starting Nomad agent...
==> Nomad agent configuration:Client: trueLog Level: DEBUGRegion: global (DC: dc1)Server: trueVersion: 0.6.1==> Nomad agent started! Log data will stream in below:…………
server和client都为true，表示同时开启了server和client。
新开一个终端，查看状态
nomad node-status
ID DC Name Class Drain Status
288cf1d8 dc1 controller <none> false ready
ID，它是随机生成的UUIDDC，数据中心Name，节点名称Class 节点类别Drain 漏斗模式Status 当前状态
nomad server-membersName Address Port Status Leader Protocol Build Datacenter Region
controller.global 127.0.0.1 4648 alive true 2 0.6.1 dc1 global停止
CTRL + C
5 Nomad Job
Job是Nomad主要交互的内容
示例Job
cd /etc/nomad/nomad init
#输出，这是一个示例的nomad job配置文件。
Example job file written to example.nomad运行这个job
[root@controller nomad]# nomad run example.nomad
==> Monitoring evaluation "f2915eb4"Evaluation triggered by job "example"Evaluation within deployment: "3d4565e9"Evaluation status changed: "pending" -> "complete"
==> Evaluation "f2915eb4" finished with status "complete" but failed to place all allocations:Task Group "cache" (failed to place 1 allocation):* Constraint "missing drivers" filtered 1 nodesEvaluation "3a4f267c" waiting for additional capacity to place remainder
报错，原因是未开启Docker
systemctl start docker
[root@controller ~]# nomad run example.nomad
==> Monitoring evaluation "46df41a2"Evaluation triggered by job "example"Evaluation within deployment: "637faa61"Evaluation status changed: "pending" -> "complete"
==> Evaluation "46df41a2" finished with status "complete"
查看job状态
[root@controller nomad]# nomad status example
ID = example
Name = example
Submit Date = 04/22/22 11:57:22 CST
Type = service
Priority = 50
Datacenters = dc1
Status = running
Periodic = false
Parameterized = falseSummary
Task Group Queued Starting Running Failed Complete Lost
cache 0 0 1 0 0 0Latest Deployment
ID = 637faa61
Status = successful
Description = Deployment completed successfullyDeployed
Task Group Desired Placed Healthy Unhealthy
cache 1 1 1 0Allocations
ID Node ID Task Group Version Desired Status Created At
d4595003 288cf1d8 cache 2 run running 04/22/22 11:59:18 CST检查job的分配情况。
[root@controller ~]# nomad alloc-status d4595003
ID = d4595003
Eval ID = f218342a
Name = example.cache[0]
Node ID = 288cf1d8
Job ID = example
Job Version = 2
Client Status = running
Client Description = <none>
Desired Status = run
Desired Description = <none>
Created At = 04/22/22 11:59:18 CST
Deployment ID = 637faa61
Deployment Health = healthyTask "redis" is "running"
Task Resources
CPU Memory Disk IOPS Addresses
4/500 MHz 924 KiB/256 MiB 300 MiB 0 db: 127.0.0.1:22788Task Events:
Started At = 04/22/22 03:59:47 UTC
Finished At = N/A
Total Restarts = 0
Last Restart = N/ARecent Events:
Time Type Description
04/22/22 11:59:47 CST Started Task started by client
04/22/22 11:59:18 CST Driver Downloading image redis:3.2
04/22/22 11:59:18 CST Task Setup Building Task Directory
04/22/22 11:59:18 CST Received Task received by clientLogs打印
[root@controller ~]# nomad logs dab3f690 redis修改job
vim example.nomad...
count = 3
...:wqnomad plan example.nomad# nomad run -check-index 7 example.nomad停止job
[root@controller ~]# nomad stop example
==> Monitoring evaluation "a3883687"Evaluation triggered by job "example"Evaluation within deployment: "264c07db"Evaluation status changed: "pending" -> "complete"
==> Evaluation "a3883687" finished with status "complete"建立Nomad集群
测试环境：
192.168.143.203（server）
192.168.143.194（server）
192.168.143.192（client）
配置
分别配置一次
mkdir /etc/nomad/
cd /etc/nomad/vim nomad_test.hcl
-----
datacenter = "dc1"
data_dir = "/root/nomad/data"server {enabled = truebootstrap_expect = 3
}client {enabled = trueservers = ["192.168.143.203:4647"] #此处写本机ip
}
新开终端,加入集群
[root@controller ~]# nomad server-join "192.168.143.192:4648"
Joined 1 servers successfully查看成员
root@controller ~]# nomad server-members
Name Address Port Status Leader Protocol Build Datacenter Region
compute.global 10.10.20.192 4648 alive false 2 0.6.1 dc1 global
controller.global 127.0.0.1 4648 alive false 2 0.6.1 dc1 global
stone.global 10.10.20.194 4648 alive false 2 0.6.1 dc1 globalCentOS8 Nomad安装（2）相关推荐
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