Zen

Translation

English type: delimited block -
Fedora CoreOS 38.20230709.3.0
Kernel 6.3.11-200.fc38.x86_64 on an x86_64 (ttyS0)
81/810 · 81

Sign in to save the translation.

English Indonesian Actions
We need to call the script from the previous section by using a systemd unit. Let's write a systemd unit into the `issuegen-public-ipv4.service` file that does what we want, which is to execute on first boot and not again:
 
cat <<'EOF' > issuegen-public-ipv4.service
[Unit]
Before=systemd-user-sessions.service
Wants=network-online.target
After=network-online.target
ConditionPathExists=!/var/lib/issuegen-public-ipv4
 
[Service]
Type=oneshot
ExecStart=/usr/local/bin/public-ipv4.sh
ExecStartPost=/usr/bin/touch /var/lib/issuegen-public-ipv4
RemainAfterExit=yes
 
[Install]
WantedBy=multi-user.target
EOF
 
Writing the Butane config and converting to Ignition
Menulis konfig Butane dan mengonversi ke Ignition
We can now create a Butane config that will include the script and systemd unit file contents by picking up the local `public-ipv4.sh` and `issuegen-public-ipv4.service` files using local file references. The final Butane config, stored in `services.bu`, will be:
 
variant: fcos
version: {butane-latest-stable-spec}
systemd:
units:
- name: serial-getty@ttyS0.service
dropins:
- name: autologin-core.conf
contents: |
[Service]
# Override Execstart in main unit
ExecStart=
# Add new Execstart with `-` prefix to ignore failure`
ExecStart=-/usr/sbin/agetty --autologin core --noclear %I $TERM
- name: issuegen-public-ipv4.service
enabled: true
contents_local: issuegen-public-ipv4.service
storage:
files:
- path: /etc/hostname
mode: 0644
contents:
inline: |
tutorial
- path: /etc/profile.d/systemd-pager.sh
mode: 0644
contents:
inline: |
# Tell systemd to not use a pager when printing information
export SYSTEMD_PAGER=cat
- path: /usr/local/bin/public-ipv4.sh
mode: 0755
contents:
local: public-ipv4.sh
 
Check the Butane https://coreos.github.io/butane/examples/[Examples] and https://coreos.github.io/butane/specs/[Configuration specifications] for more details about local file includes.
 
With the files `public-ipv4.sh`, `issuegen-public-ipv4.service`, and `services.bu` in the current working directory we can now convert to Ignition:
 
butane --pretty --strict --files-dir=./ services.bu --output services.ign
 
Testing
 
Just as before we will use the following to boot the instance:
 
# Setup the correct SELinux label to allow access to the config
chcon --verbose --type svirt_home_t services.ign
 
# Start a Fedora CoreOS virtual machine
virt-install --name=fcos --vcpus=2 --ram=2048 --os-variant=fedora-coreos-stable \
--import --network=bridge=virbr0 --graphics=none \
--qemu-commandline="-fw_cfg name=opt/com.coreos/config,file=${PWD}/services.ign" \
--disk="size=20,backing_store=${PWD}/fedora-coreos.qcow2"
 
And view on the console that the `Detected Public IPv4` is shown in the console output right before you are dropped to a login prompt:
 
Fedora CoreOS 38.20230709.3.0
Kernel 6.3.11-200.fc38.x86_64 on an x86_64 (ttyS0)
Fedora CoreOS 38.20230709.3.0
Kernel 6.3.11-200.fc38.x86_64 on an x86_64 (ttyS0)
SSH host key: SHA256:tYHKk26+NZ/+ZytWLXClGz813PQJDGP/2+AiuZ8fiqk (ECDSA)
SSH host key: SHA256:jJASZec/91zXd4or0uiFsvsfaLC6viLronfxIwQlNCs (ED25519)
SSH host key: SHA256:2XlSZAehEu666fmXeM8d47lpIJd92MBOqgMazT4GsVw (RSA)
enp1s0: 192.168.124.150 fe80::475a:7a10:2302:b670
Ignition: ran on 2023/08/03 16:40:45 UTC (this boot)
Ignition: user-provided config was applied
No SSH authorized keys provided by Ignition or Afterburn
Detected Public IPv4: is 3.252.102.80
tutorial login: core (automatic login)
 
Fedora CoreOS 38.20230709.3.0
[core@tutorial ~]$
 
And the service shows it was launched successfully:
 
[core@tutorial ~]$ systemctl status --full issuegen-public-ipv4.service
● issuegen-public-ipv4.service
Loaded: loaded (/etc/systemd/system/issuegen-public-ipv4.service; enabled; preset: enabled)
Drop-In: /usr/lib/systemd/system/service.d
└─10-timeout-abort.conf
Active: active (exited) since Thu 2023-08-03 16:40:55 UTC; 1min 7s ago
Process: 1423 ExecStart=/usr/local/bin/public-ipv4.sh (code=exited, status=0/SUCCESS)
Process: 1460 ExecStartPost=/usr/bin/touch /var/lib/issuegen-public-ipv4 (code=exited, status=0/SUCCESS)
Main PID: 1423 (code=exited, status=0/SUCCESS)
CPU: 84ms
 
Aug 03 16:40:55 tutorial systemd[1]: Starting issuegen-public-ipv4.service...
Aug 03 16:40:55 tutorial public-ipv4.sh[1424]: % Total % Received % Xferd Average Speed Time Time Time Current
Aug 03 16:40:55 tutorial public-ipv4.sh[1424]: Dload Upload Total Spent Left Speed
Aug 03 16:40:55 tutorial public-ipv4.sh[1424]: [158B blob data]
Aug 03 16:40:55 tutorial systemd[1]: Finished issuegen-public-ipv4.service.
 
Cleanup
 
Now let's take down the instance for the next test. First, disconnect from the serial console by pressing `CTRL` + `]` and then destroy the machine:
 
virsh destroy fcos
virsh undefine --remove-all-storage fcos
 
You may now proceed with the xref:tutorial-containers.adoc[next tutorial].
 

Loading…

User avatar atriwidada

Translation added
Fedora CoreOS 38.20230709.3.0
Kernel 6.3.11-200.fc38.x86_64 on an x86_64 (ttyS0)
Fedora CoreOS 38.20230709.3.0
Kernel 6.3.11-200.fc38.x86_64 on an x86_64 (ttyS0)
a year ago
User avatar None

String updated in the repository
Fedora CoreOS 38.20230709.3.0
Kernel 6.3.11-200.fc38.x86_64 on an x86_64 (ttyS0)
 
a year ago
Browse all string changes

Things to check

Unchanged translation

Source and translation are identical

Reset

Glossary

English Indonesian
No related strings found in the glossary.

14881181 String information

Source string description
type: delimited block -
Flags
no-wrap, placeholders:r"`[\w.\/\-_=@&*:$●+~()\] ]*`"
Source string location
pages/tutorial-services.adoc:122
String age
a year ago
Last updated
a year ago
Source string age
a year ago
Translation file
po/id/master/pages/tutorial-services.po, string 27