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node.go
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node.go
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package e2eutil
import (
"fmt"
"os"
"path/filepath"
"time"
"github.com/hashicorp/nomad/api"
"github.com/hashicorp/nomad/testutil"
)
// AgentDisconnect is a test helper function that runs a raw_exec job
// that will disconnect a client at the network level and reconnect it
// after the specified period of time.
//
// Returns once the job is registered with the job ID of the restart
// job and any registration errors, not after the duration, so that
// callers can take actions while the client is down.
func AgentDisconnect(nodeID string, after time.Duration) (string, error) {
jobID := "disconnect-" + nodeID
vars := []string{"-var", "nodeID=" + nodeID}
if after > 0 {
vars = append(vars, "-var", fmt.Sprintf("time=%d", int(after.Seconds())))
}
jobFilePath := "../e2eutil/input/disconnect-node.nomad"
// TODO: temporary hack around having older tests running on the
// framework vs new tests not, as the framework has a different
// working directory
dir, err := os.Getwd()
if err != nil {
return "", err
}
if filepath.Base(dir) == "e2e" {
jobFilePath = "e2eutil/input/disconnect-node.nomad"
}
err = RegisterWithArgs(jobID, jobFilePath, vars...)
return jobID, err
}
// AgentRestartAfter is a test helper function that runs a raw_exec
// job that will stop a client and restart it after the specified
// period of time. The node must be running under systemd.
//
// Returns once the job is registered with the job ID of the restart
// job and any registration errors, not after the duration, so that
// callers can take actions while the client is down.
func AgentRestartAfter(nodeID string, after time.Duration) (string, error) {
jobID := "restart-" + nodeID
vars := []string{"-var", "nodeID=" + nodeID}
if after > 0 {
vars = append(vars, "-var", fmt.Sprintf("time=%d", int(after.Seconds())))
}
jobFilePath := "../e2eutil/input/restart-node.nomad"
// TODO: temporary hack around having older tests running on the
// framework vs new tests not, as the framework has a different
// working directory
dir, err := os.Getwd()
if err != nil {
return "", err
}
if filepath.Base(dir) == "e2e" {
jobFilePath = "e2eutil/input/restart-node.nomad"
}
err = RegisterWithArgs(jobID, jobFilePath, vars...)
return jobID, err
}
// AgentRestart is a test helper function that restarts a client node
// running under systemd using a raw_exec job. Returns the job ID of
// the restart job so that callers can clean it up.
func AgentRestart(client *api.Client, nodeID string) (string, error) {
jobID, err := AgentRestartAfter(nodeID, 0)
if err != nil {
return jobID, err
}
reasonErr := fmt.Errorf("timed out")
retries := 30
for retries > 0 {
time.Sleep(1 * time.Second)
retries--
allocStubs, _, err := client.Jobs().Allocations(jobID, true, nil)
if err != nil {
reasonErr = err
continue
}
if len(allocStubs) > 0 {
INNER:
for _, state := range allocStubs[0].TaskStates {
if state.State == "dead" {
node, _, err := client.Nodes().Info(nodeID, nil)
if err != nil {
reasonErr = err
break INNER
}
if node != nil && node.Status == "ready" {
return jobID, nil
}
reasonErr = fmt.Errorf("node status not ready")
}
}
}
}
return jobID, fmt.Errorf("node did not become ready: %v", reasonErr)
}
// ListWindowsClientNodes returns a list of Windows client IDs, so that tests
// can skip operating-specific tests if there are no Windows clients available.
// Returns an error only on client errors.
func ListWindowsClientNodes(client *api.Client) ([]string, error) {
return listClientNodesByOS(client, "windows")
}
// ListLinuxClientNodes returns a list of Linux client IDs, so that tests
// can skip operating-specific tests if there are no Linux clients available
// Returns an error only on client errors.
func ListLinuxClientNodes(client *api.Client) ([]string, error) {
return listClientNodesByOS(client, "linux")
}
func listClientNodesByOS(client *api.Client, osName string) ([]string, error) {
nodeIDs := []string{}
nodes, _, err := client.Nodes().List(&api.QueryOptions{})
if err != nil {
return nodeIDs, fmt.Errorf("could not query nodes: %v", err)
}
for _, stubNode := range nodes {
node, _, err := client.Nodes().Info(stubNode.ID, nil)
if err != nil {
return nodeIDs, fmt.Errorf("could not query nodes: %v", err)
}
if name, ok := node.Attributes["kernel.name"]; ok && name == osName {
nodeIDs = append(nodeIDs, stubNode.ID)
}
}
return nodeIDs, nil
}
func NodeStatusList() ([]map[string]string, error) {
out, err := Command("nomad", "node", "status", "-verbose")
if err != nil {
return nil, fmt.Errorf("'nomad node status' failed: %w", err)
}
nodes, err := ParseColumns(out)
if err != nil {
return nil, fmt.Errorf("could not parse node status output: %w", err)
}
return nodes, nil
}
func NodeStatusListFiltered(filterFn func(string) bool) ([]map[string]string, error) {
out, err := Command("nomad", "node", "status", "-verbose")
if err != nil {
return nil, fmt.Errorf("'nomad node status' failed: %w", err)
}
allNodes, err := ParseColumns(out)
if err != nil {
return nil, fmt.Errorf("could not parse node status output: %w", err)
}
nodes := []map[string]string{}
for _, node := range allNodes {
out, err := Command("nomad", "node", "status", "-verbose", node["ID"])
if err != nil {
return nil, fmt.Errorf("could not node status output: %w", err)
}
if filterFn(out) {
nodes = append(nodes, node)
}
}
return nodes, nil
}
func WaitForNodeStatus(nodeID, status string, wc *WaitConfig) error {
var got string
var err error
interval, retries := wc.OrDefault()
testutil.WaitForResultRetries(retries, func() (bool, error) {
time.Sleep(interval)
nodeStatuses, err := NodeStatusList()
if err != nil {
return false, err
}
for _, nodeStatus := range nodeStatuses {
if nodeStatus["ID"] == nodeID {
got = nodeStatus["Status"]
if got == status {
return true, nil
}
}
}
return false, nil
}, func(e error) {
err = fmt.Errorf("node status check failed: got %#v", got)
})
return err
}