how to wirte a multiline text including space key to "late-commands" section in cloud-init "user-data" file
i am trying to write a user-data file so i could deploy many ubuntu server at the same time. but now i am stuck at the late-commands section. i am trying to add a netplan configuration to 01-network-manager-all.yaml file. it is a yaml file so i have to keep the space key and input multiline text. i tried using
echo "" >> 01-network-manager-all.yaml
doing this line by line. is there any way to insert multiline text at the same time? thanks!
Is there any way to insert multiline text at the same time?
Yes, plenty … In Bash(The default login shell in Ubuntu), a few examples using:
Here Document
$ cat << 'EOF' > file
Line one
Line two
Line three
Line four
EOF
$ cat file
Line one
Line two
Line three
Line four
printf
$ printf '%sn'
'Line one'
' Line two'
' Line three'
'Line four'
> file
$ cat file
Line one
Line two
Line three
Line four
or
$ printf '%sn'
'Line one
Line two
Line three
Line four'
> file
$ cat file
Line one
Line two
Line three
Line four
echo
$ echo -e
'Line onen'
' Line twon'
' Line threen'
'Line four'
> file
$ cat file
Line one
Line two
Line three
Line four
or
$ echo
'Line one
Line two
Line three
Line four'
> file
$ cat file
Line one
Line two
Line three
Line four
An autoinstall like the following snippet will delete the installer generated network config and write a custom network config using late-commands.
#cloud-config
autoinstall:
late-commands:
- |
rm /target/etc/netplan/00-installer-config.yaml
cat <<EOF > /target/etc/netplan/01-network-manager-all.yaml
network:
version: 2
ethernets:
zz-all-en:
match:
name: "en*"
dhcp4: true
zz-all-eth:
match:
name: "eth*"
dhcp4: true
EOF
see also