288 lines
7.1 KiB
Go
288 lines
7.1 KiB
Go
package command
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import (
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"fmt"
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"github.com/hashicorp/nomad/api"
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"sort"
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"strings"
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)
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type NodeStatusCommand struct {
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Meta
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}
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func (c *NodeStatusCommand) Help() string {
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helpText := `
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Usage: nomad node-status [options] <node>
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Display status information about a given node. The list of nodes
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returned includes only nodes which jobs may be scheduled to, and
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includes status and other high-level information.
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If a node ID is passed, information for that specific node will
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be displayed. If no node ID's are passed, then a short-hand
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list of all nodes will be displayed.
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General Options:
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` + generalOptionsUsage() + `
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Node Status Options:
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-short
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Display short output. Used only when a single node is being
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queried, and drops verbose output about node allocations.
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-verbose
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Display full information.
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-allocs
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Display a count of running allocations for each node.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *NodeStatusCommand) Synopsis() string {
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return "Display status information about nodes"
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}
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func (c *NodeStatusCommand) Run(args []string) int {
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var short, verbose, list_allocs bool
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flags := c.Meta.FlagSet("node-status", FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.BoolVar(&short, "short", false, "")
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flags.BoolVar(&verbose, "verbose", false, "")
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flags.BoolVar(&list_allocs, "allocs", false, "")
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if err := flags.Parse(args); err != nil {
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return 1
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}
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// Check that we got either a single node or none
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args = flags.Args()
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if len(args) > 1 {
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c.Ui.Error(c.Help())
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return 1
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}
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// Truncate the id unless full length is requested
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length := shortId
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if verbose {
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length = fullId
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}
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// Get the HTTP client
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client, err := c.Meta.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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// Use list mode if no node name was provided
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if len(args) == 0 {
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// Query the node info
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nodes, _, err := client.Nodes().List(nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node status: %s", err))
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return 1
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}
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// Return nothing if no nodes found
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if len(nodes) == 0 {
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return 0
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}
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// Format the nodes list
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out := make([]string, len(nodes)+1)
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if list_allocs {
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out[0] = "ID|DC|Name|Class|Drain|Status|Running Allocs"
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} else {
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out[0] = "ID|DC|Name|Class|Drain|Status"
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}
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for i, node := range nodes {
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if list_allocs {
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numAllocs, err := getRunningAllocs(client, node.ID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node allocations: %s", err))
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return 1
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}
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out[i+1] = fmt.Sprintf("%s|%s|%s|%s|%v|%s|%v",
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limit(node.ID, length),
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node.Datacenter,
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node.Name,
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node.NodeClass,
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node.Drain,
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node.Status,
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len(numAllocs))
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} else {
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out[i+1] = fmt.Sprintf("%s|%s|%s|%s|%v|%s",
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limit(node.ID, length),
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node.Datacenter,
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node.Name,
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node.NodeClass,
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node.Drain,
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node.Status)
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}
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}
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// Dump the output
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c.Ui.Output(formatList(out))
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return 0
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}
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// Query the specific node
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nodeID := args[0]
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if len(nodeID) == 1 {
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c.Ui.Error(fmt.Sprintf("Identifier must contain at least two characters."))
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return 1
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}
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if len(nodeID)%2 == 1 {
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// Identifiers must be of even length, so we strip off the last byte
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// to provide a consistent user experience.
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nodeID = nodeID[:len(nodeID)-1]
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}
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// Exact lookup failed, try with prefix based search
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nodes, _, err := client.Nodes().PrefixList(nodeID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node info: %s", err))
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return 1
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}
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// Return error if no nodes are found
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if len(nodes) == 0 {
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c.Ui.Error(fmt.Sprintf("No node(s) with prefix %q found", nodeID))
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return 1
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}
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if len(nodes) > 1 {
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// Format the nodes list that matches the prefix so that the user
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// can create a more specific request
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out := make([]string, len(nodes)+1)
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out[0] = "ID|DC|Name|Class|Drain|Status"
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for i, node := range nodes {
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out[i+1] = fmt.Sprintf("%s|%s|%s|%s|%v|%s",
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limit(node.ID, length),
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node.Datacenter,
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node.Name,
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node.NodeClass,
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node.Drain,
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node.Status)
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}
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// Dump the output
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c.Ui.Output(fmt.Sprintf("Prefix matched multiple nodes\n\n%s", formatList(out)))
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return 0
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}
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// Prefix lookup matched a single node
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node, _, err := client.Nodes().Info(nodes[0].ID, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node info: %s", err))
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return 1
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}
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m := node.Attributes
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keys := make([]string, len(m))
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for k := range m {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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var attributes []string
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for _, k := range keys {
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if k != "" {
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attributes = append(attributes, fmt.Sprintf("%s:%s", k, m[k]))
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}
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}
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// Format the output
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basic := []string{
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fmt.Sprintf("ID|%s", limit(node.ID, length)),
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fmt.Sprintf("Name|%s", node.Name),
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fmt.Sprintf("Class|%s", node.NodeClass),
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fmt.Sprintf("DC|%s", node.Datacenter),
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fmt.Sprintf("Drain|%v", node.Drain),
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fmt.Sprintf("Status|%s", node.Status),
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fmt.Sprintf("Attributes|%s", strings.Join(attributes, ", ")),
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}
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// Dump the output
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c.Ui.Output(formatKV(basic))
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if !short {
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allocs, err := getAllocs(client, node, length)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node allocations: %s", err))
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return 1
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}
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c.Ui.Output("\n==> Allocations")
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c.Ui.Output(formatList(allocs))
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resources, err := getResources(client, node)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node resources: %s", err))
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return 1
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}
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c.Ui.Output("\n==> Resource Utilization")
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c.Ui.Output(formatList(resources))
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}
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return 0
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}
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// getRunningAllocs returns a slice of allocation id's running on the node
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func getRunningAllocs(client *api.Client, nodeID string) ([]*api.Allocation, error) {
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var allocs []*api.Allocation
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// Query the node allocations
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nodeAllocs, _, err := client.Nodes().Allocations(nodeID, nil)
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// Filter list to only running allocations
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for _, alloc := range nodeAllocs {
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if alloc.ClientStatus == "running" {
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allocs = append(allocs, alloc)
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}
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}
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return allocs, err
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}
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// getAllocs returns information about every running allocation on the node
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func getAllocs(client *api.Client, node *api.Node, length int) ([]string, error) {
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var allocs []string
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// Query the node allocations
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nodeAllocs, _, err := client.Nodes().Allocations(node.ID, nil)
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// Format the allocations
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allocs = make([]string, len(nodeAllocs)+1)
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allocs[0] = "ID|Eval ID|Job ID|Task Group|Desired Status|Client Status"
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for i, alloc := range nodeAllocs {
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allocs[i+1] = fmt.Sprintf("%s|%s|%s|%s|%s|%s",
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limit(alloc.ID, length),
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limit(alloc.EvalID, length),
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alloc.JobID,
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alloc.TaskGroup,
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alloc.DesiredStatus,
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alloc.ClientStatus)
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}
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return allocs, err
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}
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func getResources(client *api.Client, node *api.Node) ([]string, error) {
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var resources []string
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var cpu, mem, disk, iops int
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// Get list of running allocations on the node
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runningAllocs, err := getRunningAllocs(client, node.ID)
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// Get Resources
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for _, alloc := range runningAllocs {
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cpu += alloc.Resources.CPU
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mem += alloc.Resources.MemoryMB
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disk += alloc.Resources.DiskMB
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iops += alloc.Resources.IOPS
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}
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resources = make([]string, 2)
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resources[0] = "CPU|Memory MB|Disk MB|IOPS"
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resources[1] = fmt.Sprintf("%v|%v|%v|%v",
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cpu,
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mem,
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disk,
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iops)
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return resources, err
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}
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