|
| 1 | +package common |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "errors" |
| 6 | + "fmt" |
| 7 | + "path/filepath" |
| 8 | + |
| 9 | + "github.com/samber/do" |
| 10 | + "github.com/spf13/afero" |
| 11 | + clientv3 "go.etcd.io/etcd/client/v3" |
| 12 | + |
| 13 | + "github.com/pgEdge/control-plane/server/internal/certificates" |
| 14 | + "github.com/pgEdge/control-plane/server/internal/etcd" |
| 15 | + "github.com/pgEdge/control-plane/server/internal/filesystem" |
| 16 | + "github.com/pgEdge/control-plane/server/internal/patroni" |
| 17 | + "github.com/pgEdge/control-plane/server/internal/resource" |
| 18 | +) |
| 19 | + |
| 20 | +const ( |
| 21 | + etcdCaCertName = "ca.crt" |
| 22 | + etcdClientCertName = "client.crt" |
| 23 | + etcdClientKeyName = "client.key" |
| 24 | +) |
| 25 | + |
| 26 | +var _ resource.Resource = (*EtcdCreds)(nil) |
| 27 | + |
| 28 | +const ResourceTypeEtcdCreds resource.Type = "common.etcd_creds" |
| 29 | + |
| 30 | +func EtcdCredsIdentifier(instanceID string) resource.Identifier { |
| 31 | + return resource.Identifier{ |
| 32 | + ID: instanceID, |
| 33 | + Type: ResourceTypeEtcdCreds, |
| 34 | + } |
| 35 | +} |
| 36 | + |
| 37 | +type EtcdCreds struct { |
| 38 | + InstanceID string `json:"instance_id"` |
| 39 | + DatabaseID string `json:"database_id"` |
| 40 | + HostID string `json:"host_id"` |
| 41 | + NodeName string `json:"node_name"` |
| 42 | + ParentID string `json:"parent_id"` |
| 43 | + OwnerUID int `json:"owner_uid"` |
| 44 | + OwnerGID int `json:"owner_gid"` |
| 45 | + Username string `json:"username"` |
| 46 | + Password string `json:"password"` |
| 47 | + CaCert []byte `json:"ca_cert"` |
| 48 | + ClientCert []byte `json:"client_cert"` |
| 49 | + ClientKey []byte `json:"client_key"` |
| 50 | +} |
| 51 | + |
| 52 | +func (c *EtcdCreds) ResourceVersion() string { |
| 53 | + return "1" |
| 54 | +} |
| 55 | + |
| 56 | +func (c *EtcdCreds) DiffIgnore() []string { |
| 57 | + return []string{ |
| 58 | + "/username", |
| 59 | + "/password", |
| 60 | + "/ca_cert", |
| 61 | + "/client_cert", |
| 62 | + "/client_key", |
| 63 | + } |
| 64 | +} |
| 65 | + |
| 66 | +func (c *EtcdCreds) Executor() resource.Executor { |
| 67 | + return resource.HostExecutor(c.HostID) |
| 68 | +} |
| 69 | + |
| 70 | +func (c *EtcdCreds) Identifier() resource.Identifier { |
| 71 | + return EtcdCredsIdentifier(c.InstanceID) |
| 72 | +} |
| 73 | + |
| 74 | +func (c *EtcdCreds) Dependencies() []resource.Identifier { |
| 75 | + return []resource.Identifier{ |
| 76 | + filesystem.DirResourceIdentifier(c.ParentID), |
| 77 | + } |
| 78 | +} |
| 79 | + |
| 80 | +func (c *EtcdCreds) TypeDependencies() []resource.Type { |
| 81 | + return nil |
| 82 | +} |
| 83 | + |
| 84 | +func (c *EtcdCreds) Refresh(ctx context.Context, rc *resource.Context) error { |
| 85 | + fs, err := do.Invoke[afero.Fs](rc.Injector) |
| 86 | + if err != nil { |
| 87 | + return err |
| 88 | + } |
| 89 | + |
| 90 | + parentFullPath, err := filesystem.DirResourceFullPath(rc, c.ParentID) |
| 91 | + if err != nil { |
| 92 | + return fmt.Errorf("failed to get parent full path: %w", err) |
| 93 | + } |
| 94 | + certsDir := filepath.Join(parentFullPath, "etcd") |
| 95 | + |
| 96 | + caCert, err := ReadResourceFile(fs, filepath.Join(certsDir, etcdCaCertName)) |
| 97 | + if err != nil { |
| 98 | + return fmt.Errorf("failed to read CA cert: %w", err) |
| 99 | + } |
| 100 | + clientCert, err := ReadResourceFile(fs, filepath.Join(certsDir, etcdClientCertName)) |
| 101 | + if err != nil { |
| 102 | + return fmt.Errorf("failed to read client cert: %w", err) |
| 103 | + } |
| 104 | + clientKey, err := ReadResourceFile(fs, filepath.Join(certsDir, etcdClientKeyName)) |
| 105 | + if err != nil { |
| 106 | + return fmt.Errorf("failed to read client key: %w", err) |
| 107 | + } |
| 108 | + |
| 109 | + c.CaCert = caCert |
| 110 | + c.ClientCert = clientCert |
| 111 | + c.ClientKey = clientKey |
| 112 | + |
| 113 | + return nil |
| 114 | +} |
| 115 | + |
| 116 | +func (c *EtcdCreds) Create(ctx context.Context, rc *resource.Context) error { |
| 117 | + fs, err := do.Invoke[afero.Fs](rc.Injector) |
| 118 | + if err != nil { |
| 119 | + return err |
| 120 | + } |
| 121 | + certService, err := do.Invoke[*certificates.Service](rc.Injector) |
| 122 | + if err != nil { |
| 123 | + return err |
| 124 | + } |
| 125 | + etcdClient, err := do.Invoke[*clientv3.Client](rc.Injector) |
| 126 | + if err != nil { |
| 127 | + return err |
| 128 | + } |
| 129 | + |
| 130 | + parentFullPath, err := filesystem.DirResourceFullPath(rc, c.ParentID) |
| 131 | + if err != nil { |
| 132 | + return fmt.Errorf("failed to get parent full path: %w", err) |
| 133 | + } |
| 134 | + certsDir := filepath.Join(parentFullPath, "etcd") |
| 135 | + |
| 136 | + etcdCreds, err := etcd.CreateInstanceEtcdUser(ctx, |
| 137 | + etcdClient, |
| 138 | + certService, |
| 139 | + etcd.InstanceUserOptions{ |
| 140 | + InstanceID: c.InstanceID, |
| 141 | + KeyPrefix: patroni.ClusterPrefix(c.DatabaseID, c.NodeName), |
| 142 | + Password: c.Password, |
| 143 | + }, |
| 144 | + ) |
| 145 | + if err != nil { |
| 146 | + return fmt.Errorf("failed to create etcd user: %w", err) |
| 147 | + } |
| 148 | + |
| 149 | + c.Username = etcdCreds.Username |
| 150 | + c.Password = etcdCreds.Password |
| 151 | + c.CaCert = etcdCreds.CaCert |
| 152 | + c.ClientCert = etcdCreds.ClientCert |
| 153 | + c.ClientKey = etcdCreds.ClientKey |
| 154 | + |
| 155 | + if err := fs.MkdirAll(certsDir, 0o700); err != nil { |
| 156 | + return fmt.Errorf("failed to create etcd certificates directory: %w", err) |
| 157 | + } |
| 158 | + if err := fs.Chown(certsDir, c.OwnerUID, c.OwnerGID); err != nil { |
| 159 | + return fmt.Errorf("failed to change ownership for certificates directory: %w", err) |
| 160 | + } |
| 161 | + |
| 162 | + files := map[string][]byte{ |
| 163 | + etcdCaCertName: c.CaCert, |
| 164 | + etcdClientCertName: c.ClientCert, |
| 165 | + etcdClientKeyName: c.ClientKey, |
| 166 | + } |
| 167 | + |
| 168 | + for name, content := range files { |
| 169 | + if err := afero.WriteFile(fs, filepath.Join(certsDir, name), content, 0o600); err != nil { |
| 170 | + return fmt.Errorf("failed to write %s: %w", name, err) |
| 171 | + } |
| 172 | + if err := fs.Chown(filepath.Join(certsDir, name), c.OwnerUID, c.OwnerGID); err != nil { |
| 173 | + return fmt.Errorf("failed to change ownership for %s: %w", name, err) |
| 174 | + } |
| 175 | + } |
| 176 | + |
| 177 | + return nil |
| 178 | +} |
| 179 | + |
| 180 | +func (c *EtcdCreds) Update(ctx context.Context, rc *resource.Context) error { |
| 181 | + return c.Create(ctx, rc) |
| 182 | +} |
| 183 | + |
| 184 | +func (c *EtcdCreds) Delete(ctx context.Context, rc *resource.Context) error { |
| 185 | + fs, err := do.Invoke[afero.Fs](rc.Injector) |
| 186 | + if err != nil { |
| 187 | + return err |
| 188 | + } |
| 189 | + certService, err := do.Invoke[*certificates.Service](rc.Injector) |
| 190 | + if err != nil { |
| 191 | + return err |
| 192 | + } |
| 193 | + etcdClient, err := do.Invoke[*clientv3.Client](rc.Injector) |
| 194 | + if err != nil { |
| 195 | + return err |
| 196 | + } |
| 197 | + |
| 198 | + parentFullPath, err := filesystem.DirResourceFullPath(rc, c.ParentID) |
| 199 | + if err != nil { |
| 200 | + return fmt.Errorf("failed to get parent full path: %w", err) |
| 201 | + } |
| 202 | + etcdDir := filepath.Join(parentFullPath, "etcd") |
| 203 | + |
| 204 | + if err := fs.RemoveAll(etcdDir); err != nil { |
| 205 | + return fmt.Errorf("failed to remove certificates directory: %w", err) |
| 206 | + } |
| 207 | + if err := etcd.RemoveInstanceEtcdUser(ctx, etcdClient, certService, c.InstanceID); err != nil { |
| 208 | + return fmt.Errorf("failed to delete etcd user: %w", err) |
| 209 | + } |
| 210 | + |
| 211 | + return nil |
| 212 | +} |
| 213 | + |
| 214 | +func ReadResourceFile(fs afero.Fs, path string) ([]byte, error) { |
| 215 | + contents, err := afero.ReadFile(fs, path) |
| 216 | + if errors.Is(err, afero.ErrFileNotFound) { |
| 217 | + return nil, resource.ErrNotFound |
| 218 | + } else if err != nil { |
| 219 | + return nil, err |
| 220 | + } |
| 221 | + return contents, nil |
| 222 | +} |
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