-
Notifications
You must be signed in to change notification settings - Fork 569
/
check.go
239 lines (200 loc) · 6.02 KB
/
check.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
Copyright 2020 The Flux authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"context"
"encoding/json"
"os"
"os/exec"
"time"
"github.com/Masterminds/semver/v3"
"github.com/spf13/cobra"
v1 "k8s.io/api/apps/v1"
apimachineryversion "k8s.io/apimachinery/pkg/version"
"k8s.io/client-go/kubernetes"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/fluxcd/pkg/version"
"github.com/fluxcd/flux2/internal/utils"
"github.com/fluxcd/flux2/pkg/manifestgen/install"
"github.com/fluxcd/flux2/pkg/status"
)
var checkCmd = &cobra.Command{
Use: "check",
Short: "Check requirements and installation",
Long: `The check command will perform a series of checks to validate that
the local environment is configured correctly and if the installed components are healthy.`,
Example: ` # Run pre-installation checks
flux check --pre
# Run installation checks
flux check`,
RunE: runCheckCmd,
}
type checkFlags struct {
pre bool
components []string
extraComponents []string
}
type kubectlVersion struct {
ClientVersion *apimachineryversion.Info `json:"clientVersion"`
}
var checkArgs checkFlags
func init() {
checkCmd.Flags().BoolVarP(&checkArgs.pre, "pre", "", false,
"only run pre-installation checks")
checkCmd.Flags().StringSliceVar(&checkArgs.components, "components", rootArgs.defaults.Components,
"list of components, accepts comma-separated values")
checkCmd.Flags().StringSliceVar(&checkArgs.extraComponents, "components-extra", nil,
"list of components in addition to those supplied or defaulted, accepts comma-separated values")
rootCmd.AddCommand(checkCmd)
}
func runCheckCmd(cmd *cobra.Command, args []string) error {
ctx, cancel := context.WithTimeout(context.Background(), rootArgs.timeout)
defer cancel()
logger.Actionf("checking prerequisites")
checkFailed := false
fluxCheck()
if !kubectlCheck(ctx, ">=1.18.0-0") {
checkFailed = true
}
if !kubernetesCheck(">=1.16.0-0") {
checkFailed = true
}
if checkArgs.pre {
if checkFailed {
os.Exit(1)
}
logger.Successf("prerequisites checks passed")
return nil
}
logger.Actionf("checking controllers")
if !componentsCheck() {
checkFailed = true
}
if checkFailed {
os.Exit(1)
}
logger.Successf("all checks passed")
return nil
}
func fluxCheck() {
curSv, err := version.ParseVersion(VERSION)
if err != nil {
return
}
// Exclude development builds.
if curSv.Prerelease() != "" {
return
}
latest, err := install.GetLatestVersion()
if err != nil {
return
}
latestSv, err := version.ParseVersion(latest)
if err != nil {
return
}
if latestSv.GreaterThan(curSv) {
logger.Failuref("flux %s <%s (new version is available, please upgrade)", curSv, latestSv)
}
}
func kubectlCheck(ctx context.Context, constraint string) bool {
_, err := exec.LookPath("kubectl")
if err != nil {
logger.Failuref("kubectl not found")
return false
}
kubectlArgs := []string{"version", "--client", "--output", "json"}
output, err := utils.ExecKubectlCommand(ctx, utils.ModeCapture, rootArgs.kubeconfig, rootArgs.kubecontext, kubectlArgs...)
if err != nil {
logger.Failuref("kubectl version can't be determined")
return false
}
kv := &kubectlVersion{}
if err = json.Unmarshal([]byte(output), kv); err != nil {
logger.Failuref("kubectl version output can't be unmarshalled")
return false
}
v, err := version.ParseVersion(kv.ClientVersion.GitVersion)
if err != nil {
logger.Failuref("kubectl version can't be parsed")
return false
}
c, _ := semver.NewConstraint(constraint)
if !c.Check(v) {
logger.Failuref("kubectl version %s < %s", v.Original(), constraint)
return false
}
logger.Successf("kubectl %s %s", v.String(), constraint)
return true
}
func kubernetesCheck(constraint string) bool {
cfg, err := utils.KubeConfig(rootArgs.kubeconfig, rootArgs.kubecontext)
if err != nil {
logger.Failuref("Kubernetes client initialization failed: %s", err.Error())
return false
}
clientSet, err := kubernetes.NewForConfig(cfg)
if err != nil {
logger.Failuref("Kubernetes client initialization failed: %s", err.Error())
return false
}
kv, err := clientSet.Discovery().ServerVersion()
if err != nil {
logger.Failuref("Kubernetes API call failed: %s", err.Error())
return false
}
v, err := version.ParseVersion(kv.String())
if err != nil {
logger.Failuref("Kubernetes version can't be determined")
return false
}
c, _ := semver.NewConstraint(constraint)
if !c.Check(v) {
logger.Failuref("Kubernetes version %s < %s", v.Original(), constraint)
return false
}
logger.Successf("Kubernetes %s %s", v.String(), constraint)
return true
}
func componentsCheck() bool {
ctx, cancel := context.WithTimeout(context.Background(), rootArgs.timeout)
defer cancel()
kubeConfig, err := utils.KubeConfig(rootArgs.kubeconfig, rootArgs.kubecontext)
if err != nil {
return false
}
statusChecker, err := status.NewStatusChecker(kubeConfig, time.Second, rootArgs.timeout, logger)
if err != nil {
return false
}
kubeClient, err := utils.KubeClient(rootArgs.kubeconfig, rootArgs.kubecontext)
if err != nil {
return false
}
ok := true
selector := client.MatchingLabels{"app.kubernetes.io/instance": rootArgs.namespace}
var list v1.DeploymentList
if err := kubeClient.List(ctx, &list, client.InNamespace(rootArgs.namespace), selector); err == nil {
for _, d := range list.Items {
if ref, err := buildComponentObjectRefs(d.Name); err == nil {
if err := statusChecker.Assess(ref...); err != nil {
ok = false
}
}
for _, c := range d.Spec.Template.Spec.Containers {
logger.Actionf(c.Image)
}
}
}
return ok
}