Question

我有一个Kafka环境（Zookeeper + Kafka服务器+ Kafka-Connect），当我使用命令行在CentOS 7上启动每个单独的组件时，该环境可以完美运行。

现在，我正在设置这些Kafka组件以作为服务运行。为此，我创建了.service文件并将其放在/ etc / systemd / system文件夹中。以下是文件

zookeeper.service

#!/bin/bash
# vi /etc/systemd/system/zookeeper.service
[Unit]
Description=This service will start Zookeeper server which will be used by Kafka Server. 
Requires=network.target remote-fs.target
After=network.target remote-fs.target

[Service]
Type=simple
ExecStart=/opt/interactcrm/kafka_2.11-1.0.1/bin/zookeeper-server-start.sh /opt/interactcrm/kafka_2.11-1.0.1/config/zookeeper.properties
ExecStop=/opt/interactcrm/kafka_2.11-1.0.1/bin/zookeeper-server-stop.sh
TimeoutStartSec=0
Restart=on-abnormal

[Install]
WantedBy=multi-user.target

kafka.service

#!/bin/bash
# vi /etc/systemd/system/kafka.service
[Unit]
Description=This service will start Kafka server. 
Requires=zookeeper.service
After=zookeeper.service

[Service]
Type=simple
ExecStart=/opt/interactcrm/kafka_2.11-1.0.1/bin/kafka-server-start.sh /opt/interactcrm/kafka_2.11-1.0.1/config/server.properties
ExecStop=/opt/interactcrm/kafka_2.11-1.0.1/bin/kafka-server-stop.sh
TimeoutStartSec=0
Restart=on-abnormal

[Install]
WantedBy=multi-user.target

Kafka-connect.service

#!/bin/bash
# vi /etc/systemd/system/kafkaconnect.service
[Unit]
Description=This service will start Kafka Connect Service. 
Requires=network.target remote-fs.target nss-lookup.target kafka.service kafka.service
After=network.target remote-fs.target nss-lookup.target kafka.service 


[Service]
Type=forking
Environment="KAFKA_JMX_OPTS=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=10040 -Dcom.sun.management.jmxremote.local.only=true -Dcom.sun.management.jmxremote.authenticate=false"
Environment="LOG_DIR=/var/log/kafka-logs"
ExecStart=/opt/interactcrm/kafka_2.11-1.0.1/bin/connect-distributed.sh /opt/interactcrm/kafka_2.11-1.0.1/config/connect-distributed.properties
TimeoutStartSec=1000
#Restart=on-abnormal
#SuccessExitStatus=143

[Install]
WantedBy=multi-user.target

Zookeeper和Kafka服务启动没有任何问题。我可以创建主题，然后对该主题进行操作。问题出在Kafka Connect服务上。

当我尝试使用systemctl命令启动服务时，该服务无法启动。它卡住了，没有后续日志::

Oct 19 18:29:20 localhost.localdomain connect-distributed.sh[1071]: [2018-10-19 18:29:20,713] INFO Added plugin 'io.debezium.connector.mysql.MySqlConnector...er:136)
Oct 19 18:29:20 localhost.localdomain connect-distributed.sh[1071]: [2018-10-19 18:29:20,713] INFO Added plugin 'io.debezium.transforms.ByLogicalTableRoute...er:136)
Oct 19 18:29:20 localhost.localdomain connect-distributed.sh[1071]: [2018-10-19 18:29:20,713] INFO Added plugin 'io.debezium.transforms.UnwrapFromEnvelope'...er:136)
Oct 19 18:29:20 localhost.localdomain connect-distributed.sh[1071]: [2018-10-19 18:29:20,761] INFO Loading plugin from: /opt/interactcrm/debezium/debezium ...er:184)
Oct 19 18:29:28 localhost.localdomain connect-distributed.sh[1071]: [2018-10-19 18:29:28,725] INFO Registered loader: PluginClassLoader{pluginLocation=file...er:207)

此行之后，我无法在消息日志中找到此过程的任何日志，并且其他任何日志中都没有错误。该过程卡在了这一行::

INFO注册的加载器：PluginClassLoader {pluginLocation = file ... er：207）

无论我增加多少超时，这个过程都不会开始。但是，当我从命令行运行相同的命令时，服务会正常启动。

我试图从插件路径中删除所有连接器，以查看服务是否启动，但卡在同一行。

以下是我的参考点::

Kafka-Connect Service

Answer 1

**以下配置在Ubuntu中对我有用**

[单位]
需要= kafka.service
After = kafka.service

[服务]
类型=简单
用户= kafka
ExecStart = / bin / sh -c'/home/kafka/kafka/bin/connect-distributed.sh /home/kafka/kafka/config/connect-distributed.properties> /home/kafka/kafka/kafka_connect.log 2> ＆1'
重新启动=异常

[安装]
WantedBy = multi-user.target

Answer 2

我在Debain 9上也遇到了同样的问题。弄清楚这是因为该服务需要WorkingDirectory，否则kafka-connect永远不会完全充电。

因此您的服务应如下所示：

#!/bin/bash
# vi /etc/systemd/system/kafkaconnect.service
[Unit]
Description=This service will start Kafka Connect Service. 
Requires=network.target remote-fs.target nss-lookup.target kafka.service kafka.service
After=network.target remote-fs.target nss-lookup.target kafka.service 


[Service]
Type=forking
Environment="KAFKA_JMX_OPTS=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=10040 -Dcom.sun.management.jmxremote.local.only=true -Dcom.sun.management.jmxremote.authenticate=false"
Environment="LOG_DIR=/var/log/kafka-logs"
WorkingDirectory="/opt/interactcrm/kafka_2.11-1.0.1" <--- or whatever directory you to use
ExecStart=/opt/interactcrm/kafka_2.11-1.0.1/bin/connect-distributed.sh /opt/interactcrm/kafka_2.11-1.0.1/config/connect-distributed.properties
TimeoutStartSec=1000
#Restart=on-abnormal
#SuccessExitStatus=143

[Install]
WantedBy=multi-user.target

无法在CentOS 7上将Kafka-Connect作为服务启动

2 个答案: