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feat: add support for FUSE (GoogleCloudPlatform#135)
* feat: add support for FUSE This is a port of GoogleCloudPlatform/cloud-sql-proxy#1381 and GoogleCloudPlatform/cloud-sql-proxy#1400. Fixes GoogleCloudPlatform#132
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| // Copyright 2022 Google LLC | ||
| // | ||
| // 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 cmd | ||
|
|
||
| import ( | ||
| "os" | ||
| "path/filepath" | ||
| "testing" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| func TestNewCommandArgumentsOnLinux(t *testing.T) { | ||
| defaultTmp := filepath.Join(os.TempDir(), "csql-tmp") | ||
| tcs := []struct { | ||
| desc string | ||
| args []string | ||
| wantDir string | ||
| wantTempDir string | ||
| }{ | ||
| { | ||
| desc: "using the fuse flag", | ||
| args: []string{"--fuse", "/cloudsql"}, | ||
| wantDir: "/cloudsql", | ||
| wantTempDir: defaultTmp, | ||
| }, | ||
| { | ||
| desc: "using the fuse temporary directory flag", | ||
| args: []string{"--fuse", "/cloudsql", "--fuse-tmp-dir", "/mycooldir"}, | ||
| wantDir: "/cloudsql", | ||
| wantTempDir: "/mycooldir", | ||
| }, | ||
| } | ||
|
|
||
| for _, tc := range tcs { | ||
| t.Run(tc.desc, func(t *testing.T) { | ||
| c := NewCommand() | ||
| // Keep the test output quiet | ||
| c.SilenceUsage = true | ||
| c.SilenceErrors = true | ||
| // Disable execute behavior | ||
| c.RunE = func(*cobra.Command, []string) error { | ||
| return nil | ||
| } | ||
| c.SetArgs(tc.args) | ||
|
|
||
| err := c.Execute() | ||
| if err != nil { | ||
| t.Fatalf("want error = nil, got = %v", err) | ||
| } | ||
|
|
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| if got, want := c.conf.FUSEDir, tc.wantDir; got != want { | ||
| t.Fatalf("FUSEDir: want = %v, got = %v", want, got) | ||
| } | ||
|
|
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| if got, want := c.conf.FUSETempDir, tc.wantTempDir; got != want { | ||
| t.Fatalf("FUSEDir: want = %v, got = %v", want, got) | ||
| } | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| // Copyright 2022 Google LLC | ||
| // | ||
| // 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 cmd | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| func TestWindowsDoesNotSupportFUSE(t *testing.T) { | ||
| c := NewCommand() | ||
| // Keep the test output quiet | ||
| c.SilenceUsage = true | ||
| c.SilenceErrors = true | ||
| // Disable execute behavior | ||
| c.RunE = func(*cobra.Command, []string) error { return nil } | ||
| c.SetArgs([]string{"--fuse"}) | ||
|
|
||
| err := c.Execute() | ||
| if err == nil { | ||
| t.Fatal("want error != nil, got = nil") | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Copyright 2022 Google LLC | ||
| // | ||
| // 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 | ||
| // | ||
| // https://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. | ||
|
|
||
| //go:build !windows | ||
| // +build !windows | ||
|
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| package proxy | ||
|
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| import ( | ||
| "context" | ||
| "syscall" | ||
|
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| "github.com/hanwen/go-fuse/v2/fs" | ||
| "github.com/hanwen/go-fuse/v2/fuse" | ||
| "github.com/hanwen/go-fuse/v2/fuse/nodefs" | ||
| ) | ||
|
|
||
| // symlink implements a symbolic link, returning the underlying path when | ||
| // Readlink is called. | ||
| type symlink struct { | ||
| fs.Inode | ||
| path string | ||
| } | ||
|
|
||
| // Readlink implements fs.NodeReadlinker and returns the symlink's path. | ||
| func (s *symlink) Readlink(ctx context.Context) ([]byte, syscall.Errno) { | ||
| return []byte(s.path), fs.OK | ||
| } | ||
|
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| // readme represents a static read-only text file. | ||
| type readme struct { | ||
| fs.Inode | ||
| } | ||
|
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| const readmeText = ` | ||
| When applications attempt to open files in this directory, a remote connection | ||
| to the AlloyDB instance of the same name will be established. | ||
| For example, when you run one of the following commands, the proxy will initiate | ||
| a connection to the corresponding Cloud SQL instance, given you have the correct | ||
| IAM permissions. | ||
| psql "host=/somedir/project.region.cluster.instance dbname=mydb user=myuser" | ||
| The proxy will create a directory with the instance short name, and create a | ||
| socket inside that directory with the special Postgres name: .s.PGSQL.5432. | ||
| Listing the contents of this directory will show all instances with active | ||
| connections. | ||
| ` | ||
|
|
||
| // Getattr implements fs.NodeGetattrer and indicates that this file is a regular | ||
| // file. | ||
| func (*readme) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) syscall.Errno { | ||
| *out = fuse.AttrOut{Attr: fuse.Attr{ | ||
| Mode: 0444 | syscall.S_IFREG, | ||
| Size: uint64(len(readmeText)), | ||
| }} | ||
| return fs.OK | ||
| } | ||
|
|
||
| // Read implements fs.NodeReader and supports incremental reads. | ||
| func (*readme) Read(ctx context.Context, f fs.FileHandle, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) { | ||
| end := int(off) + len(dest) | ||
| if end > len(readmeText) { | ||
| end = len(readmeText) | ||
| } | ||
| return fuse.ReadResultData([]byte(readmeText[off:end])), fs.OK | ||
| } | ||
|
|
||
| // Open implements fs.NodeOpener and supports opening the README as a read-only | ||
| // file. | ||
| func (*readme) Open(ctx context.Context, mode uint32) (fs.FileHandle, uint32, syscall.Errno) { | ||
| df := nodefs.NewDataFile([]byte(readmeText)) | ||
| rf := nodefs.NewReadOnlyFile(df) | ||
| return rf, 0, fs.OK | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // Copyright 2022 Google LLC | ||
| // | ||
| // 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 proxy | ||
|
|
||
| import ( | ||
| "errors" | ||
| "os" | ||
| ) | ||
|
|
||
| const ( | ||
| macfusePath = "/Library/Filesystems/macfuse.fs/Contents/Resources/mount_macfuse" | ||
| osxfusePath = "/Library/Filesystems/osxfuse.fs/Contents/Resources/mount_osxfuse" | ||
| ) | ||
|
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| // SupportsFUSE checks if macfuse or osxfuse are installed on the host by | ||
| // looking for both in their known installation location. | ||
| func SupportsFUSE() error { | ||
| // This code follows the same strategy as hanwen/go-fuse. | ||
| // See https://github.com/hanwen/go-fuse/blob/0f728ba15b38579efefc3dc47821882ca18ffea7/fuse/mount_darwin.go#L121-L124. | ||
|
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| // check for macfuse first (newer version of osxfuse) | ||
| if _, err := os.Stat(macfusePath); err != nil { | ||
| // if that fails, check for osxfuse next | ||
| if _, err := os.Stat(osxfusePath); err != nil { | ||
| return errors.New("failed to find osxfuse or macfuse: verify FUSE installation and try again (see https://osxfuse.github.io).") | ||
| } | ||
| } | ||
| return nil | ||
| } |
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