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update alpine image to 3.14 for latest iptables-restore command

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with --wait option, and use wait where its available
This commit is contained in:
Murali Reddy 2021-06-28 02:53:41 +05:30 committed by Aaron U'Ren
parent 468670bebb
commit 751981c318
2 changed files with 20 additions and 4 deletions
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2
Dockerfile
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@ -1,5 +1,5 @@
ARG ARCH=
FROM ${ARCH}alpine:3.12
FROM ${ARCH}alpine:3.14
RUN apk add --no-cache \
iptables \

22
pkg/utils/iptables.go
View File

@ -4,6 +4,7 @@ import (
"bytes"
"fmt"
"os/exec"
"strings"
)
// SaveInto calls `iptables-save` for given table and stores result in a given buffer.
@ -32,15 +33,30 @@ func Restore(table string, data []byte) error {
if err != nil {
return err
}
args := []string{"iptables-restore", "-T", table}
var args []string
args = []string{"iptables-restore", "--help"}
cmd := exec.Cmd{
Path: path,
Args: args,
}
cmdOutput, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("%v (%s)", err, cmdOutput)
}
if strings.Contains(string(cmdOutput), "wait") {
args = []string{"iptables-restore", "--wait", "-T", table}
} else {
args = []string{"iptables-restore", "-T", table}
}
cmd = exec.Cmd{
Path: path,
Args: args,
Stdin: bytes.NewBuffer(data),
}
b, err := cmd.CombinedOutput()
cmdOutput, err = cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("%v (%s)", err, b)
return fmt.Errorf("%v (%s)", err, cmdOutput)
}
return nil