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274d34a25a
Add auto-update support to `podman kube play`. Auto-update policies can
be configured for:
* the entire pod via the `io.containers.autoupdate` annotation
* a specific container via the `io.containers.autoupdate/$name` annotation
To make use of rollbacks, the `io.containers.sdnotify` policy should be
set to `container` such that the workload running _inside_ the container
can send the READY message via the NOTIFY_SOCKET once ready. For
further details on auto updates and rollbacks, please refer to the
specific article [1].
Since auto updates and rollbacks bases on Podman's systemd integration,
the k8s YAML must be executed in the `podman-kube@` systemd template.
For further details on how to run k8s YAML in systemd via Podman, please
refer to the specific article [2].
An examplary k8s YAML may look as follows:
```YAML
apiVersion: v1
kind: Pod
metadata:
annotations:
io.containers.autoupdate: "local"
io.containers.autoupdate/b: "registry"
labels:
app: test
name: test_pod
spec:
containers:
- command:
- top
image: alpine
name: a
- command:
- top
image: alpine
name: b
```
[1] https://www.redhat.com/sysadmin/podman-auto-updates-rollbacks
[2] https://www.redhat.com/sysadmin/kubernetes-workloads-podman-systemd
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
49 lines
1.2 KiB
Bash
49 lines
1.2 KiB
Bash
# -*- bash -*-
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#
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# BATS helpers for systemd-related functionality
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#
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# podman initializes this if unset, but systemctl doesn't
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if [ -z "$XDG_RUNTIME_DIR" ]; then
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if is_rootless; then
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export XDG_RUNTIME_DIR=/run/user/$(id -u)
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fi
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fi
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# For tests which write systemd unit files
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UNIT_DIR="/run/systemd/system"
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_DASHUSER=
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if is_rootless; then
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UNIT_DIR="${XDG_RUNTIME_DIR}/systemd/user"
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# Why isn't systemd smart enough to figure this out on its own?
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_DASHUSER="--user"
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fi
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mkdir -p $UNIT_DIR
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systemctl() {
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command systemctl $_DASHUSER "$@"
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}
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journalctl() {
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command journalctl $_DASHUSER "$@"
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}
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systemd-run() {
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command systemd-run $_DASHUSER "$@";
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}
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install_kube_template() {
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# If running from a podman source directory, build and use the source
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# version of the play-kube-@ unit file
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unit_name="podman-kube@.service"
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unit_file="contrib/systemd/system/${unit_name}"
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if [[ -e ${unit_file}.in ]]; then
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echo "# [Building & using $unit_name from source]" >&3
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# Force regenerating unit file (existing one may have /usr/bin path)
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rm -f $unit_file
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BINDIR=$(dirname $PODMAN) make $unit_file
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cp $unit_file $UNIT_DIR/$unit_name
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fi
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}
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