/
common.go
147 lines (118 loc) · 2.82 KB
/
common.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
package node
import (
"errors"
"fmt"
"golang.org/x/net/context"
"github.com/docker/swarmkit/api"
"github.com/docker/swarmkit/cmd/swarmctl/common"
"github.com/spf13/cobra"
)
var (
errNoChange = errors.New("availability was already set to the requested value")
)
func changeNodeAvailability(cmd *cobra.Command, args []string, availability api.NodeSpec_Availability) error {
if len(args) == 0 {
return errors.New("missing node ID")
}
c, err := common.Dial(cmd)
if err != nil {
return err
}
node, err := getNode(common.Context(cmd), c, args[0])
if err != nil {
return err
}
spec := &node.Spec
if spec.Availability == availability {
return errNoChange
}
spec.Availability = availability
_, err = c.UpdateNode(common.Context(cmd), &api.UpdateNodeRequest{
NodeID: node.ID,
NodeVersion: &node.Meta.Version,
Spec: spec,
})
if err != nil {
return err
}
return nil
}
func changeNodeMembership(cmd *cobra.Command, args []string, membership api.NodeSpec_Membership) error {
if len(args) == 0 {
return errors.New("missing node ID")
}
c, err := common.Dial(cmd)
if err != nil {
return err
}
node, err := getNode(common.Context(cmd), c, args[0])
if err != nil {
return err
}
spec := &node.Spec
if spec.Membership == membership {
return errNoChange
}
spec.Membership = membership
_, err = c.UpdateNode(common.Context(cmd), &api.UpdateNodeRequest{
NodeID: node.ID,
NodeVersion: &node.Meta.Version,
Spec: spec,
})
if err != nil {
return err
}
return nil
}
func changeNodeRole(cmd *cobra.Command, args []string, role api.NodeRole) error {
if len(args) == 0 {
return errors.New("missing node ID")
}
c, err := common.Dial(cmd)
if err != nil {
return err
}
node, err := getNode(common.Context(cmd), c, args[0])
if err != nil {
return err
}
spec := &node.Spec
if spec.Role == role {
return errNoChange
}
spec.Role = role
_, err = c.UpdateNode(common.Context(cmd), &api.UpdateNodeRequest{
NodeID: node.ID,
NodeVersion: &node.Meta.Version,
Spec: spec,
})
if err != nil {
return err
}
return nil
}
func getNode(ctx context.Context, c api.ControlClient, input string) (*api.Node, error) {
// GetNode to match via full ID.
rg, err := c.GetNode(ctx, &api.GetNodeRequest{NodeID: input})
if err != nil {
// If any error (including NotFound), ListServices to match via ID prefix and full name.
rl, err := c.ListNodes(ctx,
&api.ListNodesRequest{
Filters: &api.ListNodesRequest_Filters{
NamePrefixes: []string{input},
},
},
)
if err != nil {
return nil, err
}
if len(rl.Nodes) == 0 {
return nil, fmt.Errorf("node %s not found", input)
}
if l := len(rl.Nodes); l > 1 {
return nil, fmt.Errorf("node %s is ambiguous (%d matches found)", input, l)
}
return rl.Nodes[0], nil
}
return rg.Node, nil
}