consul知识点归纳

consul_template: https://www.hi-linux.com/posts/36431.html

1、下载安装包 并解压consul 得到consul二进制文件

https://releases.hashicorp.com/consul/1.3.1/consul_1.3.1_linux_amd64.zip

mkdir /application && mv consul /application

2、启动脚本启动consul_server

#!/bin/bashbin_path=/application/data_path="$bin_path"/datanodename=`hostname`idc=dc1bindip=`/sbin/ifconfig eth0 |grep '\binet \b' |sed -nr 's#[^0-9]*([0-9.]*).*#\1#gp'`bootstrap_expect=1$bin_path/consul agent  -server \                        -bind=$bindip \                        -ui \   -client=0.0.0.0 \                        -bootstrap-expect=$bootstrap_expect \                        -data-dir $data_path \                        -node $nodename \                        -datacenter=$idc \                        -log-level=warn \                        -pid-file=$bin_path/consul.pid

3、consul配合consul_template自动修改prometheus配置

参考博客：https://www.hi-linux.com/posts/36431.html

1、consul指定添加单个key

./consul kv put prometheus/kubernetes-apiserver/address 10.0.0.31

2、consul指定获取单个key

./consul kv get prometheus/kubernetes-apiserver/address

3、consul指定删除单个key

./consul kv delete prometheus/kubernetes-apiserver/address

4、consul_template安装

$ wget https://releases.hashicorp.com/consul-template/0.18.3/consul-template_0.18.3_linux_amd64.zip$ unzip consul-template_0.18.3_linux_amd64.zip$ mv consul-template /usr/local/bin/

5、prometheus配置文件来设置tcp端口检测机制：

- job_name: "tcp_port_discorvery"  scrape_interval: 5s  metrics_path: /probe  params:    module: [tcp_connect]  file_sd_configs:    - files:  - /home/work/software/prometheus/tcp_port.json  relabel_configs:    - source_labels: [__address__]  target_label: __param_target- source_labels: [__param_target]  target_label: instance- target_label: __address__  replacement: xxx.xx.xx.xx:31659

配置consul_template模板来进行配置渲染

vim /prometheus/template.json[{{ range tree "prometheus/linux" }}{"targets": ["{{ .Value }}"],"labels": {"process_name": "{{ .Key }}"}},{{ end }}{"targets": ["xxx.xx.xx.xx:80"],"labels": {"process_name": "tengine"}}]

vim /application/prometheus.opsconsul {address = "xxx.xx.xx.xx:8500"}template {source = "/prometheus/template.json"destination = "/home/work/software/prometheus/tcp_port.json"command = "curl -X POST http://127.0.0.1:9090/-/reload"}

测试模板生成文件 看到文件内容为空

consul-template  -consul-addr xxx.xxx.xx.xx:8500 -template="complate.json:result" -once -dry

将要获取的key推到consul中注册

./consul kv put prometheus/tcp_port/k8smaster-apiserver 1xx.xx.xx.xx:6443

测试无误后启动consul-template

consul-template -config "/application/prometheus.ops" &

也可以添加到systemctl服务管理程序设置开机自启动