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1 change: 0 additions & 1 deletion Dockerfile
Original file line number Diff line number Diff line change
Expand Up @@ -113,7 +113,6 @@ RUN ["install", "-o", "icinga", "-g", "icinga", "-d", "/data"]
RUN ["bash", "-exo", "pipefail", "-c", "for d in /etc/icinga2 /var/*/icinga2; do mkdir -p $(dirname /data-init$d); mv $d /data-init$d; ln -vs /data$d $d; done"]

EXPOSE 5665
USER icinga
CMD ["icinga2", "daemon"]


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34 changes: 32 additions & 2 deletions entrypoint/main.go
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import (
"fmt"
"github.com/otiai10/copy"
"golang.org/x/crypto/ssh/terminal"
"io/fs"
"io/ioutil"
"os"
"os/exec"
Expand All @@ -17,6 +18,8 @@ import (
"time"
)

const icingaUid = 5665
const dataVolume = "/data"
const ca = "/var/lib/icinga2/certs/ca.crt"
const crtMode = 0640
const mSmtpRc = "/var/lib/icinga2/.msmtprc"
Expand All @@ -35,11 +38,38 @@ func entrypoint() error {
return nil
}

if os.Getuid() == 0 {
logf(info, "Giving %s to the icinga user as we're root", dataVolume)

_ = filepath.WalkDir(dataVolume, func(path string, _ fs.DirEntry, err error) error {
if err == nil {
err = os.Lchown(path, icingaUid, icingaUid)
}

if err != nil {
logf(warning, "Can't chown %s: %s", path, err.Error())
return filepath.SkipDir
}

return nil
})

logf(info, "Dropping privileges as we're root")

if err := syscall.Setgid(icingaUid); err != nil {
return err
}

if err := syscall.Setuid(icingaUid); err != nil {
return err
}
}

if os.Getpid() == 1 {
logf(info, "Initializing /data as we're the init process (PID 1)")
logf(info, "Initializing %s as we're the init process (PID 1)", dataVolume)

for _, dir := range []string{"etc", "var/cache", "var/lib", "var/log", "var/run", "var/spool"} {
dest := path.Join("/data", dir, "icinga2")
dest := path.Join(dataVolume, dir, "icinga2")
logf(info, "Checking %#v", dest)

if _, errSt := os.Stat(dest); errSt != nil {
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