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 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"]

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

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。