//If image is running, stop and refresh with latest version from docker registry.
//Otherwise, start latest version from docker registry
//Ensure started container is healthy
func refresh(appNames string, pathToYml string, airplaneMode bool) {
fmt.Println("Fetching latest versions of applications from docker hub")
apps := splitCommas(appNames)
internalApplications := getInternalApplications(pathToYml)
registeredApps := filterAppsAndExpandDepends(apps, internalApplications, airplaneMode)
var appsInStartOrder []Application
for i := len(registeredApps) - 1; i >= 0; i-- {
appsInStartOrder = append(appsInStartOrder, registeredApps[i])
}
healthChecker := healthcheck.HealthChecker{1, 1, 30}
for _, app := range appsInStartOrder {
var start = true
latestVersion := getLatestVersion(app.ImageName, airplaneMode)
if docker.IsImageRunning(app.ImageName) {
fmt.Println(" checking")
currentVersion := docker.GetImageVersion(app.ImageName)
image := fmt.Sprintf("%s:%s", currentVersion, latestVersion)
fmt.Printf("Running Version [%s:%s], Latest Version: [%s:%s]\n", app.ImageName, currentVersion, app.ImageName, latestVersion)
if currentVersion != latestVersion {
fmt.Printf("Stopping Version [%s:%s]\n", app.ImageName, currentVersion)
docker.Stop([]docker.Container{docker.GetContainerIdFromImageName(fmt.Sprintf("%s:%s", app.ImageName, currentVersion))})
} else {
if healthcheck.IsHealthy(app.HealthCheck, healthChecker) {
fmt.Println(" - healthy")
start = false
} else {
fmt.Println(" unhealthy. Restarting")
docker.Stop([]docker.Container{docker.GetContainerIdFromImageName(image)})
}
}
} else {
fmt.Println(" starting")
}
if start {
newImage := fmt.Sprintf("%s:%s", app.ImageName, latestVersion)
docker.Start(app.Service, newImage, app.Ports)
fmt.Printf(" - Healthcheck: %s\n ", app.HealthCheck.Description())
if !healthcheck.AttemptHealthCheck(app.HealthCheck, healthChecker) {
os.Exit(1)
}
}
fmt.Println("")
}
}
//If image is running, ping healthcheck.
// If not healthy, get latest version from docker registry, stop old and start new
//Otherwise, start latest version from docker registry
//Ensure started container is healthy
func up(applications []Application, airplaneMode bool) {
healthChecker := healthcheck.HealthChecker{1, 1, 60}
for _, app := range applications {
fmt.Printf("%s", app.ImageName)
var start = true
if docker.IsImageRunning(app.ImageName) {
fmt.Println(" checking")
if healthcheck.IsHealthy(app.HealthCheck, healthChecker) {
fmt.Println(" - healthy")
start = false
} else {
fmt.Println(" unhealthy. Restarting")
latestVersion := getLatestVersion(app.ImageName, airplaneMode)
image := fmt.Sprintf("%s:%s", strings.Split(app.ImageName, ":")[0], latestVersion)
docker.Stop([]docker.Container{docker.GetContainerIdFromImageName(image)})
}
} else {
fmt.Println(" starting")
}
if start {
image := fmt.Sprintf("%s:%s", strings.Split(app.ImageName, ":")[0], getLatestVersion(app.ImageName, airplaneMode))
docker.Start(app.Service, image, app.Ports)
fmt.Printf(" - Healthcheck: %s\n ", app.HealthCheck.Description())
if !healthcheck.AttemptHealthCheck(app.HealthCheck, healthChecker) {
os.Exit(1)
}
}
fmt.Println("")
}
}
func down(appNames string, pathToYml string, airplaneMode bool) {
var allAppsToStop []docker.Container
internalApplications := getInternalApplications(pathToYml)
apps := splitCommas(appNames)
registeredApps := filterApps(apps, internalApplications, airplaneMode)
running := docker.BuildListOfRunningContainers()
depends := make(map[string][]Application)
runningVersions := make(map[string]string)
//create two (2) maps:
//1) running application's dependencies to its parent application
//2) an image to its currently running version
//this will be used to find downstream dependencies and stop the correct containers in the next step
for _, container := range running {
//map image names to locally running version
runningVersions[container.Image.Base] = container.Image.Version
regApp := getApplication(container.Image.Base, internalApplications, airplaneMode)
for _, dependency := range regApp.Dependencies {
if !strings.Contains(dependency, dockerHubOrgName(dependency)) {
dependency = fmt.Sprintf("%s/%s", dockerHubOrgName(dependency), dependency)
}
depends[dependency] = append(depends[dependency], regApp)
}
}
//applications to stop consist of itself and any downstream dependencies
for _, app := range registeredApps {
downStreamDeps := getDownstreamDepends(app.ImageName, depends, runningVersions)
allAppsToStop = append(allAppsToStop, getContainersForDownstreamDeps(downStreamDeps)...)
image := fmt.Sprintf("%s:%s", app.ImageName, runningVersions[app.ImageName])
allAppsToStop = append(allAppsToStop, docker.GetContainerIdFromImageName(image))
}
docker.Stop(allAppsToStop)
}