mirror of
https://github.com/criyle/go-sandbox.git
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container: load default environment variable from /.env
This commit is contained in:
parent
f308637481
commit
84888375c4
@ -1,8 +1,12 @@
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package container
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/criyle/go-sandbox/pkg/unixsocket"
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)
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@ -23,6 +27,11 @@ func (c *containerServer) handleConf(conf *confCmd) error {
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if c.ContainerGID == 0 {
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c.ContainerGID = containerGID
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}
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env, err := readDotEnv()
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if err != nil {
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return err
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}
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c.defaultEnv = env
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}
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return c.sendReply(reply{}, unixsocket.Msg{})
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}
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@ -68,3 +77,28 @@ func (c *containerServer) handleReset() error {
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}
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return c.sendReply(reply{}, unixsocket.Msg{})
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}
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// readDotEnv attempts to read /.env file and save as default environment variables
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func readDotEnv() ([]string, error) {
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f, err := os.Open("/.env")
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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return nil, nil
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}
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}
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defer f.Close()
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var ret []string
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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line := strings.TrimSpace(scanner.Text())
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if len(line) == 0 || strings.HasPrefix(line, "#") {
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continue
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}
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if !strings.Contains(line, "=") {
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return nil, fmt.Errorf("dotenv: invalid line %s", line)
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}
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ret = append(ret, line)
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}
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return ret, nil
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}
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@ -36,8 +36,12 @@ func (c *containerServer) handleExecve(cmd *execCmd, msg unixsocket.Msg) error {
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files = files[1:]
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}
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var env []string
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env = append(env, c.defaultEnv...)
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env = append(env, cmd.Env...)
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if len(cmd.Argv) > 0 {
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exePath, err := lookPath(cmd.Argv[0], cmd.Env)
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exePath, err := lookPath(cmd.Argv[0], env)
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if err != nil {
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return c.sendErrorReply("handle: %s: %v", cmd.Argv[0], err)
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}
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@ -80,7 +84,7 @@ func (c *containerServer) handleExecve(cmd *execCmd, msg unixsocket.Msg) error {
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r := forkexec.Runner{
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Args: cmd.Argv,
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Env: cmd.Env,
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Env: env,
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ExecFile: execFile,
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RLimits: cmd.RLimits,
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Files: files,
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@ -17,6 +17,7 @@ import (
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type containerServer struct {
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socket *socket
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containerConfig
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defaultEnv []string
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done chan struct{}
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err error
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@ -54,7 +54,8 @@ func lookPath(name string, env []string) (string, error) {
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func findPath(env []string) ([]string, error) {
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// find PATH=
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const pathPrefix = "PATH="
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for _, s := range env {
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for i := len(env) - 1; i >= 0; i-- {
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s := env[i]
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if strings.HasPrefix(s, pathPrefix) {
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return filepath.SplitList(s[len(pathPrefix):]), nil
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}
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4
go.mod
4
go.mod
@ -4,8 +4,8 @@ go 1.18
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require (
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github.com/elastic/go-seccomp-bpf v1.2.0
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golang.org/x/net v0.0.0-20220812174116-3211cb980234
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golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab
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golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c
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golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64
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)
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require github.com/pkg/errors v0.9.1 // indirect
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8
go.sum
8
go.sum
@ -13,12 +13,12 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
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github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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golang.org/x/net v0.0.0-20220812174116-3211cb980234 h1:RDqmgfe7SvlMWoqC3xwQ2blLO3fcWcxMa3eBLRdRW7E=
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golang.org/x/net v0.0.0-20220812174116-3211cb980234/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
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golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c h1:JVAXQ10yGGVbSyoer5VILysz6YKjdNT2bsvlayjqhes=
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golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
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golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20190405154228-4b34438f7a67/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab h1:2QkjZIsXupsJbJIdSjjUOgWK3aEtzyuh2mPt3l/CkeU=
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golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64 h1:UiNENfZ8gDvpiWw7IpOMQ27spWmThO1RwwdQVbJahJM=
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golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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