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1 | 1 | package dashboard |
2 | 2 |
|
3 | 3 | import ( |
4 | | - "helm.sh/helm/v3/pkg/release" |
| 4 | + "bytes" |
| 5 | + "encoding/json" |
| 6 | + "errors" |
| 7 | + "fmt" |
| 8 | + log "github.com/sirupsen/logrus" |
| 9 | + "os/exec" |
| 10 | + "regexp" |
| 11 | + "strings" |
5 | 12 | ) |
6 | 13 |
|
7 | 14 | type DataLayer struct { |
8 | 15 | } |
9 | 16 |
|
10 | | -func (l *DataLayer) CheckConnectivity() { |
11 | | - // TODO: check that we can work with context and subcommands |
| 17 | +func (l *DataLayer) runCommand(cmd ...string) (string, error) { |
| 18 | + // TODO: --kube-context=context-name to juggle clusters |
| 19 | + log.Debugf("Starting command: %s", cmd) |
| 20 | + prog := exec.Command(cmd[0], cmd[1:]...) |
| 21 | + |
| 22 | + var stdout bytes.Buffer |
| 23 | + prog.Stdout = &stdout |
| 24 | + |
| 25 | + var stderr bytes.Buffer |
| 26 | + prog.Stderr = &stderr |
| 27 | + |
| 28 | + //prog.Stdout, prog.Stderr = os.Stdout, os.Stderr |
| 29 | + if err := prog.Run(); err != nil { |
| 30 | + if eerr, ok := err.(*exec.ExitError); ok { |
| 31 | + return "", fmt.Errorf("failed to run command %s: %s", cmd, eerr) |
| 32 | + } |
| 33 | + return "", err |
| 34 | + } |
| 35 | + |
| 36 | + sout := stdout.Bytes() |
| 37 | + serr := stderr.Bytes() |
| 38 | + log.Debugf("Command STDOUT:\n%s", sout) |
| 39 | + log.Debugf("Command STDERR:\n%s", serr) |
| 40 | + return string(sout), nil |
| 41 | +} |
| 42 | + |
| 43 | +func (l *DataLayer) CheckConnectivity() error { |
| 44 | + contexts, err := l.ListContexts() |
| 45 | + if err != nil { |
| 46 | + return err |
| 47 | + } |
| 48 | + |
| 49 | + if len(contexts) < 1 { |
| 50 | + return errors.New("did not find any kubectl contexts configured") |
| 51 | + } |
| 52 | + |
| 53 | + _, err = l.runCommand("helm", "env") |
| 54 | + if err != nil { |
| 55 | + return err |
| 56 | + } |
| 57 | + |
| 58 | + return nil |
| 59 | +} |
| 60 | + |
| 61 | +type KubeContext struct { |
| 62 | + IsCurrent bool |
| 63 | + Name string |
| 64 | + Cluster string |
| 65 | + AuthInfo string |
| 66 | + Namespace string |
12 | 67 | } |
13 | 68 |
|
14 | | -func (l *DataLayer) ListInstalled() []*release.Release { |
15 | | - return nil // TODO |
| 69 | +func (l *DataLayer) ListContexts() (res []KubeContext, err error) { |
| 70 | + out, err := l.runCommand("kubectl", "config", "get-contexts") |
| 71 | + if err != nil { |
| 72 | + return nil, err |
| 73 | + } |
| 74 | + |
| 75 | + // kubectl has no JSON output for it, we'll have to do custom text parsing |
| 76 | + lines := strings.Split(out, "\n") |
| 77 | + |
| 78 | + // find field positions |
| 79 | + fields := regexp.MustCompile(`(\w+\s+)`).FindAllString(lines[0], -1) |
| 80 | + cur := len(fields[0]) |
| 81 | + name := cur + len(fields[1]) |
| 82 | + cluster := name + len(fields[2]) |
| 83 | + auth := cluster + len(fields[3]) |
| 84 | + |
| 85 | + // read items |
| 86 | + for _, line := range lines[1:] { |
| 87 | + if strings.TrimSpace(line) == "" { |
| 88 | + continue |
| 89 | + } |
| 90 | + |
| 91 | + res = append(res, KubeContext{ |
| 92 | + IsCurrent: strings.TrimSpace(line[0:cur]) == "*", |
| 93 | + Name: strings.TrimSpace(line[cur:name]), |
| 94 | + Cluster: strings.TrimSpace(line[name:cluster]), |
| 95 | + AuthInfo: strings.TrimSpace(line[cluster:auth]), |
| 96 | + Namespace: strings.TrimSpace(line[auth:]), |
| 97 | + }) |
| 98 | + } |
| 99 | + |
| 100 | + return res, nil |
| 101 | +} |
| 102 | + |
| 103 | +// unpleasant copy from Helm sources, where they have it non-public |
| 104 | +type releaseElement struct { |
| 105 | + Name string `json:"name"` |
| 106 | + Namespace string `json:"namespace"` |
| 107 | + Revision string `json:"revision"` |
| 108 | + Updated string `json:"updated"` |
| 109 | + Status string `json:"status"` |
| 110 | + Chart string `json:"chart"` |
| 111 | + AppVersion string `json:"app_version"` |
| 112 | +} |
| 113 | + |
| 114 | +func (l *DataLayer) ListInstalled() (res []releaseElement, err error) { |
| 115 | + out, err := l.runCommand("helm", "ls", "--all", "--all-namespaces", "--output", "json") |
| 116 | + if err != nil { |
| 117 | + return nil, err |
| 118 | + } |
| 119 | + |
| 120 | + err = json.Unmarshal([]byte(out), &res) |
| 121 | + if err != nil { |
| 122 | + return nil, err |
| 123 | + } |
| 124 | + return res, nil |
16 | 125 | } |
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