forked from juju/juju
/
output_summary.go
192 lines (165 loc) · 5.08 KB
/
output_summary.go
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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package status
import (
"bytes"
"fmt"
"io"
"net"
"strings"
"github.com/juju/ansiterm"
"github.com/juju/ansiterm/tabwriter"
"github.com/juju/errors"
"github.com/juju/utils"
"github.com/juju/utils/set"
"github.com/juju/juju/cmd/output"
"github.com/juju/juju/status"
)
// FormatSummary writes a summary of the current environment
// including the following information:
// - Headers:
// - All subnets the environment occupies.
// - All ports the environment utilizes.
// - Sections:
// - Machines: Displays total #, and then the # in each state.
// - Units: Displays total #, and then # in each state.
// - Applications: Displays total #, their names, and how many of each
// are exposed.
func FormatSummary(writer io.Writer, value interface{}) error {
fs, valueConverted := value.(formattedStatus)
if !valueConverted {
return errors.Errorf("expected value of type %T, got %T", fs, value)
}
f := newSummaryFormatter(writer)
stateToMachine := f.aggregateMachineStates(fs.Machines)
svcExposure := f.aggregateServiceAndUnitStates(fs.Applications)
p := f.delimitValuesWithTabs
// Print everything out
p("Running on subnets:", strings.Join(f.netStrings, ", "))
p(" Utilizing ports:", f.portsInColumnsOf(3))
f.tw.Flush()
// Right align summary information
f.tw.Init(writer, 0, 1, 2, ' ', tabwriter.AlignRight)
p("# Machines:", fmt.Sprintf("(%d)", len(fs.Machines)))
f.printStateToCount(stateToMachine)
p(" ")
p("# Units:", fmt.Sprintf("(%d)", f.numUnits))
f.printStateToCount(f.stateToUnit)
p(" ")
p("# Applications:", fmt.Sprintf("(%d)", len(fs.Applications)))
for _, svcName := range utils.SortStringsNaturally(stringKeysFromMap(svcExposure)) {
s := svcExposure[svcName]
p(svcName, fmt.Sprintf("%d/%d\texposed", s[true], s[true]+s[false]))
}
f.tw.Flush()
return nil
}
func newSummaryFormatter(writer io.Writer) *summaryFormatter {
f := &summaryFormatter{
ipAddrs: make([]net.IPNet, 0),
netStrings: make([]string, 0),
openPorts: set.NewStrings(),
stateToUnit: make(map[status.Status]int),
}
f.tw = output.TabWriter(writer)
return f
}
type summaryFormatter struct {
ipAddrs []net.IPNet
netStrings []string
numUnits int
openPorts set.Strings
// status -> count
stateToUnit map[status.Status]int
tw *ansiterm.TabWriter
}
func (f *summaryFormatter) delimitValuesWithTabs(values ...string) {
for _, v := range values {
fmt.Fprintf(f.tw, "%s\t", v)
}
fmt.Fprintln(f.tw)
}
func (f *summaryFormatter) portsInColumnsOf(col int) string {
var b bytes.Buffer
for i, p := range f.openPorts.SortedValues() {
if i != 0 && i%col == 0 {
fmt.Fprintf(&b, "\n\t")
}
fmt.Fprintf(&b, "%s, ", p)
}
// Elide the last delimiter
portList := b.String()
if len(portList) >= 2 {
return portList[:b.Len()-2]
}
return portList
}
func (f *summaryFormatter) trackUnit(name string, status unitStatus, indentLevel int) {
f.resolveAndTrackIp(status.PublicAddress)
for _, p := range status.OpenedPorts {
if p != "" {
f.openPorts.Add(p)
}
}
f.numUnits++
f.stateToUnit[status.WorkloadStatusInfo.Current]++
}
func (f *summaryFormatter) printStateToCount(m map[status.Status]int) {
for _, stateToCount := range utils.SortStringsNaturally(stringKeysFromMap(m)) {
numInStatus := m[status.Status(stateToCount)]
f.delimitValuesWithTabs(stateToCount+":", fmt.Sprintf(" %d ", numInStatus))
}
}
func (f *summaryFormatter) trackIp(ip net.IP) {
for _, net := range f.ipAddrs {
if net.Contains(ip) {
return
}
}
ipNet := net.IPNet{IP: ip, Mask: ip.DefaultMask()}
f.ipAddrs = append(f.ipAddrs, ipNet)
f.netStrings = append(f.netStrings, ipNet.String())
}
func (f *summaryFormatter) resolveAndTrackIp(publicDns string) {
// TODO(katco-): We may be able to utilize upcoming work which will expose these addresses outright.
ip, err := net.ResolveIPAddr("ip4", publicDns)
if err != nil {
logger.Warningf(
"unable to resolve %s to an IP address. Status may be incorrect: %v",
publicDns,
err,
)
return
}
f.trackIp(ip.IP)
}
func (f *summaryFormatter) aggregateMachineStates(machines map[string]machineStatus) map[status.Status]int {
stateToMachine := make(map[status.Status]int)
for _, name := range utils.SortStringsNaturally(stringKeysFromMap(machines)) {
m := machines[name]
f.resolveAndTrackIp(m.DNSName)
if agentState := m.JujuStatus.Current; agentState == "" {
agentState = status.Pending
} else {
stateToMachine[agentState]++
}
}
return stateToMachine
}
func (f *summaryFormatter) aggregateServiceAndUnitStates(services map[string]applicationStatus) map[string]map[bool]int {
svcExposure := make(map[string]map[bool]int)
for _, name := range utils.SortStringsNaturally(stringKeysFromMap(services)) {
s := services[name]
// Grab unit states
for _, un := range utils.SortStringsNaturally(stringKeysFromMap(s.Units)) {
u := s.Units[un]
f.trackUnit(un, u, 0)
recurseUnits(u, 1, f.trackUnit)
}
if _, ok := svcExposure[name]; !ok {
svcExposure[name] = make(map[bool]int)
}
svcExposure[name][s.Exposed]++
}
return svcExposure
}