SkyWalking 从 8.4 版本开始支持监控主机,用户可以轻松从 dashboard 上检测可能的问题,例如当 CPU 使用过载、内存或磁盘空间不足或者当网络状态不健康时等。 与监控 MySQL Server 类似,SkyWalking 也是利用 Prometheus 和 OpenTelemetry 收集主机的 metrics 数据。 同时 SkyWalking 也提供了使用 InfluxDB Telegraf 通过 Telegraf receiver 接收主机的 metrics 数据,telegraf receiver 插件负责接收、处理和转换 metrics, 然后将转换后的数据发送给 SkyWalking MAL 处理。
方式一:Prometheus + OpenTelemetry,处理流程如下:
- Prometheus Node Exporter 从主机收集 metrics 数据.
- OpenTelemetry Collector 通过 Prometheus Receiver 从 Node Exporters 抓取 metrics 数据, 然后将 metrics 推送的到 SkyWalking OAP Server.
- SkyWalking OAP Server 通过 MAL 引擎去分析、计算、聚合和存储,处理规则位于 /config/otel-oc-rules/vm.yaml 文件.
- 用户可以通过 SkyWalking WebUI dashboard 查看监控数据。
方式二:通过 Telegraf receiver 具体参考官网文档的部署方式 skywalking.apache.org/docs/main/n... 。
下面让我们一起开始部署吧
部署 SkyWalking
之前的文章都是默认大家会部署 SkyWalking 的,这里我也提供下平时测试用的部署方式,我这里采用 docker compose 部署,主要是参考官网提供的部署配置, SkyWalking 提供的部署基础配置在代码目录中,链接地址 github.com/apache/skyw... 。
docker-compose.yml
yaml
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
version: '3.8'
services:
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch-oss:${ES_VERSION}
container_name: elasticsearch
ports:
- "9200:9200"
healthcheck:
test: [ "CMD-SHELL", "curl --silent --fail localhost:9200/_cluster/health || exit 1" ]
interval: 30s
timeout: 10s
retries: 3
start_period: 10s
environment:
- discovery.type=single-node
- bootstrap.memory_lock=true
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
ulimits:
memlock:
soft: -1
hard: -1
oap:
image: ${OAP_IMAGE}
container_name: oap
depends_on:
elasticsearch:
condition: service_healthy
links:
- elasticsearch
ports:
- "11800:11800"
- "12800:12800"
healthcheck:
test: [ "CMD-SHELL", "/skywalking/bin/swctl ch" ]
interval: 30s
timeout: 10s
retries: 3
start_period: 10s
environment:
SW_STORAGE: elasticsearch
SW_STORAGE_ES_CLUSTER_NODES: elasticsearch:9200
SW_HEALTH_CHECKER: default
SW_TELEMETRY: prometheus
JAVA_OPTS: "-Xms2048m -Xmx2048m"
ui:
image: ${UI_IMAGE}
container_name: ui
depends_on:
oap:
condition: service_healthy
links:
- oap
ports:
- "8080:8080"
environment:
SW_OAP_ADDRESS: http://oap:12800
SW_ZIPKIN_ADDRESS: http://oap:9412
.env
用于镜像版本,这里使用 SkyWalking 9.7.0 版本,也是当前最新的版本
text
# The docker-compose.yml file is meant to be used locally for testing only after a local build, if you want to use it
# with officially released Docker images, please modify the environment variables on your command line interface.
# i.e.:
# export OAP_IMAGE=apache/skywalking-oap-server:<tag>
# export UI_IMAGE=apache/skywalking-ui:<tag>
# docker compose up
ES_VERSION=7.4.2
OAP_IMAGE=apache/skywalking-oap-server:9.7.0
UI_IMAGE=apache/skywalking-ui:9.7.0
启动 SkyWalking
shell
docker compose up
启动完成后,访问 http://IP:8080 就可以正常打开 dashboard 页面了,当然这个时候还看不到监控数据。
部署 Prometheus node-exporter
node-exporter 官方文档 ,下载地址 prometheus.io/download/#n... 这里下载 1.7.0 版本
shell
wget https://github.com/prometheus/node_exporter/releases/download/v1.7.0/node_exporter-1.7.0.linux-amd64.tar.gz
tar xvfz node_exporter-1.7.0.linux-amd64.tar.gz
cd node_exporter-1.7.0.linux-amd64
./node_exporter
启动成功后访问 http://IP:9100/metrics 可以看到采集到的 metrics 信息。
部署 OpenTelemetry Collector
OpenTelemetry Collector 官方文档 这里将 otel-collector
和 skywalking 一起通过 docker compose 部署,完整配置如下:
yaml
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
version: '3.8'
services:
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch-oss:${ES_VERSION}
container_name: elasticsearch
ports:
- "9200:9200"
healthcheck:
test: [ "CMD-SHELL", "curl --silent --fail localhost:9200/_cluster/health || exit 1" ]
interval: 30s
timeout: 10s
retries: 3
start_period: 10s
environment:
- discovery.type=single-node
- bootstrap.memory_lock=true
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
ulimits:
memlock:
soft: -1
hard: -1
oap:
image: ${OAP_IMAGE}
container_name: oap
depends_on:
elasticsearch:
condition: service_healthy
links:
- elasticsearch
ports:
- "11800:11800"
- "12800:12800"
healthcheck:
test: [ "CMD-SHELL", "/skywalking/bin/swctl ch" ]
interval: 30s
timeout: 10s
retries: 3
start_period: 10s
environment:
SW_STORAGE: elasticsearch
SW_STORAGE_ES_CLUSTER_NODES: elasticsearch:9200
SW_HEALTH_CHECKER: default
SW_TELEMETRY: prometheus
JAVA_OPTS: "-Xms2048m -Xmx2048m"
ui:
image: ${UI_IMAGE}
container_name: ui
depends_on:
oap:
condition: service_healthy
links:
- oap
ports:
- "8080:8080"
environment:
SW_OAP_ADDRESS: http://oap:12800
SW_ZIPKIN_ADDRESS: http://oap:9412
otel-collector:
image: otel/opentelemetry-collector:0.50.0
container_name: otel-collector
command: [ "--config=/etc/otel-collector-config.yaml" ]
volumes:
- /opt/docker/skywalking/otel-collector-config.yaml:/etc/otel-collector-config.yaml
expose:
- 55678
在 /opt/docker/skywalking 目录(也可以自定义)创建配置文件 otel-collector-config.yaml
yaml
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
receivers:
prometheus:
config:
scrape_configs:
- job_name: "vm-monitoring" # make sure to use this in the vm.yaml to filter only VM metrics
scrape_interval: 10s
static_configs:
- targets: ["192.168.56.102:9100"] # OpenTelemetry Collector 的地址,根据自己的服务器IP进行调整
processors:
batch:
exporters:
otlp:
endpoint: "oap:11800" # The OAP Server address
# The config format of OTEL version prior to 0.34.0, eg. 0.29.0, should be:
# insecure: true
tls:
insecure: true
#insecure: true
# Exports data to the console
logging:
loglevel: debug
service:
pipelines:
metrics:
receivers: [prometheus]
processors: [batch]
exporters: [otlp, logging]
docker compose 重新启动
shell
docker compose restart
访问 SkyWalking dashboard 页面,正常情况下就可以看到监控到的数据了。
相关链接
- skywalking.apache.org/docs/main/n...
- skywalking.apache.org/blog/2021-0...
- prometheus.io/docs/guides...
- opentelemetry.io/docs/collec...
更多精彩内容请关注公众号 geekymv,喜欢请分享给更多的朋友哦」如有问题,欢迎交流。