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add fully aio systemd unit file and script #292

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Merged
rootfs merged 1 commit into from
Sep 21, 2021
Merged

add fully aio systemd unit file and script #292

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30 changes: 30 additions & 0 deletions hack/all-in-one/README.md
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# Containerized Microshift

## Run microshift all-in-one as a systemd service

Copy microshift-aio unit file to /etc/systemd and the aio-run to /usr/bin

```bash
cp microshift-aio.service /etc/systemd/system/microshift-aio.service
cp microshift-aio-run /usr/bin/
```
Now enable and start the service. The KUBECONFIG location will be written to /etc/microshift-aio/microshift-aio.conf
If the `microshift-vol` podman volume does not exist, the systemd service will create one.

```bash
systemctl enable microshift-aio --now
source /etc/microshift-aio/microshift-aio.conf
```

Verify that microshift is running.
```
kubectl get pods -A
```

Stop microshift-aio service

```bash
systemctl stop microshift-aio
```

**NOTE** Stopping microshift-aio service _does not_ remove the podman volume `microshift-vol`.
A restart will use the same volume.

## Build Container Image
First copy microshift binary to this directory, then build the container image:
```bash
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24 changes: 24 additions & 0 deletions hack/all-in-one/microshift-aio-run
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#!/bin/bash

set -euxo pipefail

setsebool -P container_manage_cgroup true

if ! /usr/bin/podman volume exists microshift-vol
then
/usr/bin/podman volume create microshift-vol
fi

[[ -d /etc/microshift-aio ]] || mkdir /etc/microshift-aio
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@rootfs rootfs Sep 21, 2021

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what is this for?

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@sallyom sallyom Sep 21, 2021

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I wanted a file with the location of the KUBECONFIG like so:

cat <<EOF > /etc/microshift-aio/microshift-aio.conf
export KUBECONFIG=$(/usr/bin/podman volume inspect microshift-vol --format "{{.Mountpoint}}")/microshift/resources/kubeadmin/kubeconfig
EOF

I could not see a better way of getting that path from the service, but that is definitely extra and does not need to be included in the service. I figured it saves users from having to look up the path.

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@sallyom sallyom Sep 21, 2021

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I also could not figure out how to run ExecStartPost=source /etc/microshift-aio/microshift-aio.conf
I tried ExecStartPost=source, ExecStartPost=/bin/bash source etc, nothing worked but there is def something that does, I gave up and pushed the commit but will keep looking

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@sallyom sallyom Sep 21, 2021

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@husky-parul if you find something that works or if we decide it's not necessary, you can remove it, feel free to squash/amend, too

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@rootfs rootfs Sep 21, 2021

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i see, that makes sense


/usr/bin/podman run -d --rm \
--name microshift --privileged \
-v /lib/modules:/lib/modules \
-v microshift-vol:/var/lib \
--hostname microshift \
--label "io.containers.autoupdate=registry" \
-p 6443:6443 quay.io/microshift/microshift:4.7.0-0.microshift-2021-08-31-224727-aio

cat <<EOF > /etc/microshift-aio/microshift-aio.conf
export KUBECONFIG=$(/usr/bin/podman volume inspect microshift-vol --format "{{.Mountpoint}}")/microshift/resources/kubeadmin/kubeconfig
EOF
15 changes: 15 additions & 0 deletions hack/all-in-one/microshift-aio.service
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[Unit]
Description=microshift all-in-one
Wants=network-online.target
After=network-online.target
RequiresMountsFor=/run/containers/storage

[Service]
Restart=on-failure
TimeoutStopSec=70
ExecStart=/bin/bash /usr/bin/microshift-aio-run
ExecStop=/usr/bin/podman stop -t 20 microshift
Type=forking

[Install]
WantedBy=multi-user.target default.target