dockerfile echo指定文件多行文本的方法实现

在dockerfile中给指定文件添加多行，注意echo后面的”$”符号

[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 portn
ovs-vsctl add-br br-exn
ovs-vsctl set Open_vSwitch . external-ids:ovn-bridge-mappings=phyNet:br-exn
n
# add nic
ovs-vsctl add-port br-ex ${OVN_PHYNET_NIC}n
n
tail -f /var/log/openvswitch/ovs-vswitchd.logn'
>> /root/start-ovs.sh
CMD ["/bin/bash","/root/start-ovs.sh"]

结果： 注意多行文本中”#” 注释行，并没有输入到指定文件中

[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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