mtu: move general files to files/, add /etc/hosts

This commit refactors the structure of the tutorial container folder
to have:

* `docker/`: Dockerfile and other build stuff
* `files/`: non-scenario related files
* `scenario*/`: scenario related

During build, files are mapped 1:1 to /, and scenario* are copied
(manually) to /bp.

This commit also adds a custom /etc/hosts (overwritten at entrypoint.sh)
for convenience.

Author: msune

tutorials/net/mtu/docker/Dockerfile

@@ -21,7 +21,7 @@ RUN apt update && apt install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 RUN mkdir /bp
-COPY . /bp
-COPY .bashrc /root/.bashrc
+COPY scenario1 /bp/scenario1
+COPY files/ /
 WORKDIR /root
 CMD ["/bp/entrypoint.sh"]

tutorials/net/mtu/BANNER tutorials/net/mtu/files/bp/BANNERtutorials/net/mtu/BANNER renamed to tutorials/net/mtu/files/bp/BANNER

@@ -24,6 +24,10 @@ log_debug(){
 	_log "DBG" "${1}"
 }
 
+setup_etc_hosts(){
+	cp -f /bp/hosts /etc/hosts
+}
+
 # $1 namespace name
 _check_ns(){
 	if ! ${SUDO} ip netns exec ${1} true >/dev/null 2>&1 ; then

tutorials/net/mtu/common.sh tutorials/net/mtu/files/bp/common.shtutorials/net/mtu/common.sh renamed to tutorials/net/mtu/files/bp/common.sh

@@ -5,6 +5,8 @@ set -euo pipefail
 cd /bp
 source common.sh
 
+setup_etc_hosts
+
 #
 # $1 scenario (default: scenario1)
 #

tutorials/net/mtu/describe.sh tutorials/net/mtu/files/bp/describe.shtutorials/net/mtu/describe.sh renamed to tutorials/net/mtu/files/bp/describe.sh

@@ -0,0 +1,15 @@
+127.0.0.1	localhost
+::1	localhost ip6-localhost ip6-loopback
+fe00::	ip6-localnet
+ff00::	ip6-mcastprefix
+ff02::1	ip6-allnodes
+ff02::2	ip6-allrouters
+
+192.168.0.2 host1
+192.168.2.2 host2
+
+192.168.0.1 routerx.ens1
+192.168.1.1 routerx.ens2
+
+192.168.1.2 routery.ens1
+192.168.2.1 routery.ens2

tutorials/net/mtu/duoexec.sh tutorials/net/mtu/files/bp/duoexec.shtutorials/net/mtu/duoexec.sh renamed to tutorials/net/mtu/files/bp/duoexec.sh

@@ -59,7 +59,7 @@ shell(){
 	fi
 	_check_ns "${1}"
 
-	ip netns exec ${1} bash --rcfile /bp/.bashrc -i
+	ip netns exec ${1} bash --rcfile /root/.bashrc -i
 }
 
 _shell_completion(){