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48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
package docker
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import (
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"github.com/docker/docker/api/types"
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"regexp"
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)
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const (
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LabelServiceID = "uncloud.service.id"
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LabelServiceName = "uncloud.service.name"
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)
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type Container struct {
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types.Container
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}
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// runningStatusRegex matches the status string of a running container.
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// - "Up 3 minutes (healthy)" -> groups: ["Up 3 minutes (healthy)", "healthy"]
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// - "Up 5 seconds" -> groups: ["Up 5 seconds", ""]
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// - "Up 2 hours (unhealthy)" -> groups: ["Up 2 hours (unhealthy)", "unhealthy"]
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// - "Up 1 minute (health: starting)" -> groups: ["Up 1 minute (health: starting)", "health: starting"]
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// - "Restarting (0) 5 seconds ago" -> no match
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// See https://github.com/moby/moby/blob/c130ce1f5d1e38b98a97044a39557de43bc0d58f/container/state.go#L77-L90
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// for more details on how the status string for a running container is formatted.
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var runningStatusRegex = regexp.MustCompile(`^Up [^(]+(?:\(([^)]+)\))?$`)
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// Healthy determines if the container is running and healthy based on its status string.
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// A running container with no health check configured is considered healthy.
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func (c *Container) Healthy() bool {
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if c.State != "running" {
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return false
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}
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matches := runningStatusRegex.FindStringSubmatch(c.Status)
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// Not "Up" or invalid format.
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if matches == nil {
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return false
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}
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// If there's no health status (no health check configured so no parentheses), container is considered healthy.
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if matches[1] == "" {
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return true
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}
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// If the health status in parentheses is "healthy", the container is considered healthy.
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return matches[1] == types.Healthy
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}
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