I have created /usr/startup.sh script in google container which would like to execute it on startup of every pod.
I tried it doing it through command in yaml like below.
command: "sh /usr/start.sh" command: ["sh", "-c", "/usr/start.sh"]
Please let me if there is any kind of way that can execute defined script at the startup in google container/pod.
Startup scripts run on node startup, not for every pod. We don't currently have a "hook" in kubelet to run whenever a pod starts on a node. Can you maybe explain what you're trying to do?
You may want to look at the postStart lifecycle hook.
An example can be found in the kubernetes repo:
containers:
- name: nginx
image: resouer/myapp:v6
lifecycle:
postStart:
exec:
command:
- "cp"
- "/app/myapp.war /work"Here are the API docs:
// Lifecycle describes actions that the management system should take in response to container lifecycle
// events. For the PostStart and PreStop lifecycle handlers, management of the container blocks
// until the action is complete, unless the container process fails, in which case the handler is aborted.
type Lifecycle struct {
// PostStart is called immediately after a container is created. If the handler fails, the container
// is terminated and restarted.
PostStart *Handler `json:"postStart,omitempty"`
// PreStop is called immediately before a container is terminated. The reason for termination is
// passed to the handler. Regardless of the outcome of the handler, the container is eventually terminated.
PreStop *Handler `json:"preStop,omitempty"`
}