The realization of the method of specifying Multi-line text of File by dockerfile echo

Add multiple lines to the specified file in dockerfile, pay attention to the "$" symbol after echo

[root@master01 ovn-node] # cat dockerfile FROM ovn-node:2.11.2# sed Delete the specified line RUN sed-I '53d' / root/start-ovs.sh# add multiple lines with echo 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 nicovs-vsctl add-port br-ex ${OVN_PHYNET_NIC}\ n\ tail-f / var/log/openvswitch/ovs-vswitchd.log\ n'> > / root/start-ovs.shCMD ["/ bin/bash", "/ root/start-ovs.sh"]

Result: note that the "#" comment line in the multi-line text is not entered into the specified file

[root@master01 ovn-node] # cat / root/start-ovs.sh# Set remote ovn-sb for ovn-controller to connect toovs-vsctl set open. External-ids:ovn-remote=tcp:$ {OVN_SB_SERVICE_HOST}: ${OVN_SB_SERVICE_PORT} ovs-vsctl set open. External-ids:ovn-encap-type=geneveOVERLAY_ENDPOINT= `hostname-i`ovs-vsctl set open. External-ids:ovn-encap-ip=$ {OVERLAY_ENDPOINT} ovs-vsctl add-br br-exovs-vsctl set Open_vSwitch. External-ids:ovn-bridge-mappings=phyNet:br-exovs-vsctl add-port br-ex ${OVN_PHYNET_NIC} tail-f / var/log/openvswitch/ovs-vswitchd.log

The above is the whole content of this article, I hope it will be helpful to your study, and I also hope that you will support it.