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package container // import "github.com/docker/docker/integration/container"
import (
"context"
"fmt"
"testing"
"time"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/client"
"github.com/docker/docker/integration/internal/container"
"gotest.tools/v3/assert"
"gotest.tools/v3/poll"
"gotest.tools/v3/skip"
)
// TestHealthCheckWorkdir verifies that health-checks inherit the containers'
// working-dir.
func TestHealthCheckWorkdir(t *testing.T) {
skip.If(t, testEnv.OSType == "windows", "FIXME")
defer setupTest(t)()
ctx := context.Background()
client := testEnv.APIClient()
cID := container.Run(ctx, t, client, container.WithTty(true), container.WithWorkingDir("/foo"), func(c *container.TestContainerConfig) {
c.Config.Healthcheck = &containertypes.HealthConfig{
Test: []string{"CMD-SHELL", "if [ \"$PWD\" = \"/foo\" ]; then exit 0; else exit 1; fi;"},
Interval: 50 * time.Millisecond,
Retries: 3,
}
})
poll.WaitOn(t, pollForHealthStatus(ctx, client, cID, types.Healthy), poll.WithDelay(100*time.Millisecond))
}
// GitHub #37263
// Do not stop healthchecks just because we sent a signal to the container
func TestHealthKillContainer(t *testing.T) {
skip.If(t, testEnv.OSType == "windows", "Windows only supports SIGKILL and SIGTERM? See https://github.com/moby/moby/issues/39574")
defer setupTest(t)()
ctx := context.Background()
client := testEnv.APIClient()
id := container.Run(ctx, t, client, func(c *container.TestContainerConfig) {
cmd := `
# Set the initial HEALTH value so the healthcheck passes
HEALTH="1"
echo $HEALTH > /health
# Any time doHealth is run we flip the value
# This lets us use kill signals to determine when healtchecks have run.
doHealth() {
case "$HEALTH" in
"0")
HEALTH="1"
;;
"1")
HEALTH="0"
;;
esac
echo $HEALTH > /health
}
trap 'doHealth' USR1
while true; do sleep 1; done
`
c.Config.Cmd = []string{"/bin/sh", "-c", cmd}
c.Config.Healthcheck = &containertypes.HealthConfig{
Test: []string{"CMD-SHELL", `[ "$(cat /health)" = "1" ]`},
Interval: time.Second,
Retries: 5,
}
})
ctxPoll, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
poll.WaitOn(t, pollForHealthStatus(ctxPoll, client, id, "healthy"), poll.WithDelay(100*time.Millisecond))
err := client.ContainerKill(ctx, id, "SIGUSR1")
assert.NilError(t, err)
ctxPoll, cancel = context.WithTimeout(ctx, 30*time.Second)
defer cancel()
poll.WaitOn(t, pollForHealthStatus(ctxPoll, client, id, "unhealthy"), poll.WithDelay(100*time.Millisecond))
err = client.ContainerKill(ctx, id, "SIGUSR1")
assert.NilError(t, err)
ctxPoll, cancel = context.WithTimeout(ctx, 30*time.Second)
defer cancel()
poll.WaitOn(t, pollForHealthStatus(ctxPoll, client, id, "healthy"), poll.WithDelay(100*time.Millisecond))
}
// TestHealthCheckProcessKilled verifies that health-checks exec get killed on time-out.
func TestHealthCheckProcessKilled(t *testing.T) {
defer setupTest(t)()
ctx := context.Background()
apiClient := testEnv.APIClient()
cID := container.Run(ctx, t, apiClient, func(c *container.TestContainerConfig) {
c.Config.Healthcheck = &containertypes.HealthConfig{
Test: []string{"CMD", "sh", "-c", `echo "logs logs logs"; sleep 60`},
Interval: 100 * time.Millisecond,
Timeout: 50 * time.Millisecond,
Retries: 1,
}
})
poll.WaitOn(t, pollForHealthCheckLog(ctx, apiClient, cID, "Health check exceeded timeout (50ms): logs logs logs\n"))
}
func pollForHealthCheckLog(ctx context.Context, client client.APIClient, containerID string, expected string) func(log poll.LogT) poll.Result {
return func(log poll.LogT) poll.Result {
inspect, err := client.ContainerInspect(ctx, containerID)
if err != nil {
return poll.Error(err)
}
healthChecksTotal := len(inspect.State.Health.Log)
if healthChecksTotal > 0 {
output := inspect.State.Health.Log[healthChecksTotal-1].Output
if output == expected {
return poll.Success()
}
return poll.Error(fmt.Errorf("expected %q, got %q", expected, output))
}
return poll.Continue("waiting for container healthcheck logs")
}
}
func pollForHealthStatus(ctx context.Context, client client.APIClient, containerID string, healthStatus string) func(log poll.LogT) poll.Result {
return func(log poll.LogT) poll.Result {
inspect, err := client.ContainerInspect(ctx, containerID)
switch {
case err != nil:
return poll.Error(err)
case inspect.State.Health.Status == healthStatus:
return poll.Success()
default:
return poll.Continue("waiting for container to become %s", healthStatus)
}
}
}
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