/
cmd.go
178 lines (150 loc) · 5.72 KB
/
cmd.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
/*
Copyright The CloudNativePG Contributors
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 pgbasebackup implement the pgbasebackup bootstrap method
package pgbasebackup
import (
"context"
"fmt"
"os"
"github.com/spf13/cobra"
ctrl "sigs.k8s.io/controller-runtime/pkg/client"
apiv1 "github.com/cloudnative-pg/cloudnative-pg/api/v1"
"github.com/cloudnative-pg/cloudnative-pg/internal/management/istio"
"github.com/cloudnative-pg/cloudnative-pg/internal/management/linkerd"
"github.com/cloudnative-pg/cloudnative-pg/pkg/management"
"github.com/cloudnative-pg/cloudnative-pg/pkg/management/external"
"github.com/cloudnative-pg/cloudnative-pg/pkg/management/log"
"github.com/cloudnative-pg/cloudnative-pg/pkg/management/postgres"
"github.com/cloudnative-pg/cloudnative-pg/pkg/system"
)
// CloneInfo is the structure containing all the information needed
// to clone an existing server
type CloneInfo struct {
info *postgres.InitInfo
client ctrl.Client
}
// NewCmd creates the "pgbasebackup" subcommand
func NewCmd() *cobra.Command {
var clusterName string
var namespace string
var pgData string
var pgWal string
cmd := &cobra.Command{
Use: "pgbasebackup",
PreRunE: func(cmd *cobra.Command, _ []string) error {
return management.WaitKubernetesAPIServer(cmd.Context(), ctrl.ObjectKey{
Name: clusterName,
Namespace: namespace,
})
},
RunE: func(_ *cobra.Command, _ []string) error {
client, err := management.NewControllerRuntimeClient()
if err != nil {
return err
}
env := CloneInfo{
info: &postgres.InitInfo{
ClusterName: clusterName,
Namespace: namespace,
PgData: pgData,
PgWal: pgWal,
},
client: client,
}
ctx := context.Background()
if err = env.bootstrapUsingPgbasebackup(ctx); err != nil {
log.Error(err, "Unable to boostrap cluster")
}
return err
},
PostRunE: func(cmd *cobra.Command, _ []string) error {
if err := istio.TryInvokeQuitEndpoint(cmd.Context()); err != nil {
return err
}
return linkerd.TryInvokeShutdownEndpoint(cmd.Context())
},
}
cmd.Flags().StringVar(&clusterName, "cluster-name", os.Getenv("CLUSTER_NAME"), "The name of the "+
"current cluster in k8s, used to coordinate switchover and failover")
cmd.Flags().StringVar(&namespace, "namespace", os.Getenv("NAMESPACE"), "The namespace of "+
"the cluster and of the Pod in k8s")
cmd.Flags().StringVar(&pgData, "pg-data", os.Getenv("PGDATA"), "The PGDATA to be created")
cmd.Flags().StringVar(&pgWal, "pg-wal", "", "the PGWAL to be created")
return cmd
}
// bootstrapUsingPgbasebackup creates a new data dir from the configuration
func (env *CloneInfo) bootstrapUsingPgbasebackup(ctx context.Context) error {
var cluster apiv1.Cluster
err := env.client.Get(ctx, ctrl.ObjectKey{Namespace: env.info.Namespace, Name: env.info.ClusterName}, &cluster)
if err != nil {
return err
}
coredumpFilter := cluster.GetCoredumpFilter()
if err := system.SetCoredumpFilter(coredumpFilter); err != nil {
return err
}
if cluster.ShouldPgBaseBackupCreateApplicationDatabase() {
env.info.ApplicationUser = cluster.GetApplicationDatabaseOwner()
env.info.ApplicationDatabase = cluster.GetApplicationDatabaseName()
}
server, ok := cluster.ExternalCluster(cluster.Spec.Bootstrap.PgBaseBackup.Source)
if !ok {
return fmt.Errorf("missing external cluster")
}
connectionString, err := external.ConfigureConnectionToServer(
ctx, env.client, env.info.Namespace, &server)
if err != nil {
return err
}
pgVersion, err := cluster.GetPostgresqlVersion()
if err != nil {
log.Warning(
"Error while parsing PostgreSQL server version to define connection options, defaulting to PostgreSQL 11",
"imageName", cluster.GetImageName(),
"err", err)
} else if pgVersion >= 120000 {
// We explicitly disable wal_sender_timeout for join-related pg_basebackup executions.
// A short timeout could not be enough in case the instance is slow to send data,
// like when the I/O is overloaded.
connectionString += " options='-c wal_sender_timeout=0s'"
}
err = postgres.ClonePgData(connectionString, env.info.PgData, env.info.PgWal)
if err != nil {
return err
}
if cluster.IsReplica() {
// TODO: Using a replication slot on replica cluster is not supported (yet?)
_, err = postgres.UpdateReplicaConfiguration(env.info.PgData, connectionString, "")
return err
}
return env.configureInstanceAsNewPrimary(ctx, &cluster)
}
// configureInstanceAsNewPrimary sets up this instance as a new primary server, using
// the configuration created by the user and setting up the global objects as needed
func (env *CloneInfo) configureInstanceAsNewPrimary(ctx context.Context, cluster *apiv1.Cluster) error {
if err := env.info.WriteInitialPostgresqlConf(cluster); err != nil {
return err
}
if err := env.info.WriteRestoreHbaConf(); err != nil {
return err
}
// We are passing an empty environment variable since the
// cluster has just been bootstrap via pg_basebackup and at
// this moment we only use streaming replication to download
// the WALs.
//
// In the future, when we will support recovering WALs in the
// designated primary from an object store, we'll need to use
// the environment variables of the recovery object store.
return env.info.ConfigureInstanceAfterRestore(ctx, cluster, nil)
}