【发布时间】：2021-12-29 21:32:53
【问题描述】：
问题
所以我正在尝试在我的 docker-compose 设置中设置日志记录。
现在我遇到了app 服务连接到logging 服务的问题，特别是...
Error response from daemon: failed to initialize logging driver: dial udp: lookup ng on 192.168.65.5:53: read udp 192.168.65.4:50257->192.168.65.5:53: i/o timeout
我希望我的应用程序/容器将其所有日志发送到另一个具有 rsyslog 设置的容器。我不确定是否需要将服务指定为主机或其他内容，但我找不到任何解释我将如何做到这一点的东西。
最后，我想水平扩展应用程序，并让它们都指向一个负载平衡代理，如 Traefik，它将日志传递到多个 rsyslog 容器。
文档
命令行输出
$ docker-compose up
[+] Building 1.7s (18/18) FINISHED
=> [turbo-train_syslog-ng internal] load build definition from Dockerfile 0.1s
=> => transferring dockerfile: 202B 0.0s
=> [turbo-train_application internal] load build definition from Dockerfile 0.1s
=> => transferring dockerfile: 509B 0.0s
=> [turbo-train_syslog-ng internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [turbo-train_application internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [turbo-train_syslog-ng internal] load metadata for docker.io/library/alpine:latest 0.0s
=> [turbo-train_syslog-ng 1/3] FROM docker.io/library/alpine:latest 0.0s
=> [turbo-train_syslog-ng internal] load build context 0.1s
=> => transferring context: 2.91kB 0.0s
=> [turbo-train_application internal] load metadata for docker.io/library/golang:latest 1.3s
=> CACHED [turbo-train_syslog-ng 2/3] RUN apk update && apk upgrade --available && apk add rsyslog 0.0s
=> [turbo-train_syslog-ng 3/3] COPY conf/rsyslog.conf /etc/rsyslog.conf 0.1s
=> [turbo-train_application] exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:<HashValue> 0.0s
=> => naming to docker.io/library/turbo-train_syslog-ng 0.0s
=> => writing image sha256:<HashValue> 0.0s
=> => naming to docker.io/library/turbo-train_application 0.0s
=> [auth] library/golang:pull token for registry-1.docker.io 0.0s
=> [turbo-train_application build 1/4] FROM docker.io/library/golang:latest@sha256:<HashValue> 0.0s
=> [turbo-train_application internal] load build context 0.1s
=> => transferring context: 222B 0.0s
=> CACHED [turbo-train_application build 2/4] WORKDIR /go/src/app 0.0s
=> CACHED [turbo-train_application build 3/4] COPY [ ./src/go-app.go, ./src/go.mod, /go/src/app/ ] 0.0s
=> CACHED [turbo-train_application build 4/4] RUN go build -o go-app 0.0s
=> CACHED [turbo-train_application stage-1 1/1] COPY --from=build /go/src/app/go-app /go-app 0.0s
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
[+] Running 3/3
- Network turbo-train_default Created 0.7s
- Container gopkg Created 0.3s
- Container syslog-ng Created 0.3s
Attaching to gopkg, syslog-ng
syslog-ng | rsyslogd 8.2012.0: running as pid 1, enabling container-specific defaults, press ctl-c to terminate rsyslog
Error response from daemon: failed to initialize logging driver: dial udp: lookup ng on 192.168.65.5:53: read udp 192.168.65.4:50257->192.168.65.5:53: i/o timeout
docker-compose.yml
# docker-compose.yml
version: '3.9'
services:
# Svc 1
application:
build:
context: ./app
dockerfile: Dockerfile
container_name: gopkg
dns: 1.1.1.1
logging:
driver: syslog
options:
syslog-address: "udp://${syslog-ng}:514"
tag: gopkg
depends_on:
- logging
# Svc 2
syslog-ng:
build:
context: ./syslog
dockerfile: Dockerfile
container_name: syslog-ng
dns: 1.1.1.1
/etc/rsyslog.conf
# rsyslog configuration file
#
# For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html
# or latest version online at http://www.rsyslog.com/doc/rsyslog_conf.html
# If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html
#### Global directives ####
# Sets the directory that rsyslog uses for work files.
$WorkDirectory /var/lib/rsyslog
# Sets default permissions for all log files.
$FileOwner root
$FileGroup adm
$FileCreateMode 0640
$DirCreateMode 0755
$Umask 0022
# Check config syntax on startup and abort if unclean (default off).
#$AbortOnUncleanConfig on
# Reduce repeating messages (default off).
#$RepeatedMsgReduction on
#### Modules ####
# Provides --MARK-- message capability.
module(load="immark")
# Provides support for local system logging (e.g. via logger command).
module(load="imuxsock")
# Reads kernel messages.
# module(load="imklog")
#### Config files ####
# Include all config files in /etc/rsyslog.d/.
include(file="/etc/rsyslog.d/*.conf" mode="optional")
#### Rules ####
# Log all kernel messages to kern.log.
kern.* /var/log/kern.log
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
# NOTE: The minus sign in front of filename disables buffer flush.
*.info;authpriv.none;cron.none;kern.none;mail.none -/var/log/messages
# The authpriv file has restricted access.
authpriv.* /var/log/auth.log
# Log all the mail messages in one place.
mail.* -/var/log/mail.log
# Log cron stuff.
cron.* -/var/log/cron.log
# Everybody gets emergency messages.
*.emerg :omusrmsg:*
# Log all kernel messages to the console.
# Logging much else clutters up the screen.
#kern.* /dev/console
### Examples ####
# Send all logs to remote syslog via UDP.
# An on-disk queue is created for this action. If the remote host is
# down, messages are spooled to disk and sent when it is up again.
#*.* action(
# type="omfwd"
# target="192.168.0.1"
# port="514"
# protocol="udp"
# queue.filename="fwdRule1" # unique name prefix for spool files
# queue.type="LinkedList"
# queue.maxDiskSpace="256m"
# queue.saveOnShutdown="on"
# action.resumeRetryCount="-1"
# action.resumeInterval="30"
#)
# Receive messages from remote host via UDP
# for parameters see http://www.rsyslog.com/doc/imudp.html
module(load="imudp") # needs to be done just once
input(
type="imudp"
port="514"
)
Dockerfile - rsyslog (./syslog/Dockerfile)
FROM alpine:latest AS syslog
RUN apk update && apk upgrade --available && apk add rsyslog
COPY conf/rsyslog.conf /etc/rsyslog.conf
ENTRYPOINT ["rsyslogd", "-n"]
Dockerfile - Go 应用程序 (./app/Dockerfile)
# STAGE 1: Build
FROM golang:latest AS build
WORKDIR /go/src/app
COPY [ "./src/go-app.go", "./src/go.mod", "/go/src/app/" ]
RUN go build -o go-app
# -------------------------------------------------
# STAGE 2: Deployment
FROM scratch
COPY --from=build /go/src/app/go-app /go-app
ENTRYPOINT [ "/go-app" ]
【问题讨论】：
标签： docker docker-compose dockerfile rsyslog