在dockerfile中给指定文件添加多行，注意echo后面的"$"符号
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[root@master01 ovn-node]# cat dockerfile
FROM ovn-node:2.11.2
# sed 删除指定行
RUN sed -i '53d' /root/start-ovs.sh
# 用echo添加多行内容
RUN echo $'OVERLAY_ENDPOINT=`hostname -i`\n\
ovs-vsctl set open . external-ids:ovn-encap-ip=${OVERLAY_ENDPOINT}\n\
\n\
# create a bridge , then mapping outside port\n\
ovs-vsctl add-br br-ex\n\
ovs-vsctl set Open_vSwitch . external-ids:ovn-bridge-mappings=phyNet:br-ex\n\
\n\
# add nic
ovs-vsctl add-port br-ex ${OVN_PHYNET_NIC}\n\
\n\
tail -f /var/log/openvswitch/ovs-vswitchd.log\n'\
>> /root/start-ovs.sh
CMD ["/bin/bash","/root/start-ovs.sh"]
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结果： 注意多行文本中"#" 注释行，并没有输入到指定文件中
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[root@master01 ovn-node]# cat /root/start-ovs.sh
# Set remote ovn-sb for ovn-controller to connect to
ovs-vsctl set open . external-ids:ovn-remote=tcp:${OVN_SB_SERVICE_HOST}:${OVN_SB_SERVICE_PORT}
ovs-vsctl set open . external-ids:ovn-encap-type=geneve
OVERLAY_ENDPOINT=`hostname -i`
ovs-vsctl set open . external-ids:ovn-encap-ip=${OVERLAY_ENDPOINT}
ovs-vsctl add-br br-ex
ovs-vsctl set Open_vSwitch . external-ids:ovn-bridge-mappings=phyNet:br-ex
ovs-vsctl add-port br-ex ${OVN_PHYNET_NIC}
tail -f /var/log/openvswitch/ovs-vswitchd.log
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://segmentfault.com/a/1190000020399038