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Add DNS and security fields to DB

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Also moves port mappings out of the SQL DB and into a file on
disk. These could get very sizable (hundred to thousands of
ports) so moving them out to a file will keep the DB small and
fast.

Finally, add a foreign key reference from container ID to
container state ID. This ensures we never get into an
inconsistent state where we have data in one table but not the
other.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

Closes: #225
Approved by: baude
This commit is contained in:
Matthew Heon
2018-01-15 11:21:30 -05:00
committed by Atomic Bot
parent 2bfb31ddf4
commit 2e48c60bc5
4 changed files with 190 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
libpod/sql_state_internal.go
View File

@ -4,6 +4,7 @@ import (
"database/sql"
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"time"
@ -178,6 +179,8 @@ func prepareDB(db *sql.DB) (err error) {
StaticDir TEXT NOT NULL,
Mounts TEXT NOT NULL,
Privileged INTEGER NOT NULL,
NoNewPrivs INTEGER NOT NULL,
ProcessLabel TEXT NOT NULL,
MountLabel TEXT NOT NULL,
User TEXT NOT NULL,
@ -188,9 +191,13 @@ func prepareDB(db *sql.DB) (err error) {
PIDNsCtr TEXT,
UserNsCtr TEXT,
UTSNsCtr TEXT,
CgroupNsCtr TEXT,
CreateNetNS INTEGER NOT NULL,
PortMappings TEXT NOT NULL,
DNSServer TEXT NOT NULL,
DNSSearch TEXT NOT NULL,
DNSOption TEXT NOT NULL,
HostAdd TEXT NOT NULL,
Stdin INTEGER NOT NULL,
LabelsJSON TEXT NOT NULL,
@ -202,16 +209,20 @@ func prepareDB(db *sql.DB) (err error) {
CHECK (ImageVolumes IN (0, 1)),
CHECK (ReadOnly IN (0, 1)),
CHECK (SHMSize>=0),
CHECK (Privileged IN (0, 1)),
CHECK (NoNewPrivs IN (0, 1)),
CHECK (CreateNetNS IN (0, 1)),
CHECK (Stdin IN (0, 1)),
CHECK (StopSignal>=0),
FOREIGN KEY (Pod) REFERENCES pod(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (IPCNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (MountNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (NetNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (PIDNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (UserNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (UTSNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED
FOREIGN KEY (Id) REFERENCES containerState(Id) DEFERRABLE INITIALLY DEFERRED
FOREIGN KEY (Pod) REFERENCES pod(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (IPCNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (MountNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (NetNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (PIDNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (UserNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (UTSNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED,
FOREIGN KEY (CgroupNsCtr) REFERENCES containers(Id) DEFERRABLE INITIALLY DEFERRED
);
`
@ -283,6 +294,11 @@ func getSpecPath(specsDir, id string) string {
return filepath.Join(specsDir, id)
}
// Get filename for container port mappings on disk
func getPortsPath(specsDir, id string) string {
return filepath.Join(specsDir, id+"_ports")
}
// Convert a bool into SQL-readable format
func boolToSQL(b bool) int {
if b {
@ -347,19 +363,25 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
staticDir string
mounts string
privileged int
noNewPrivs int
processLabel string
mountLabel string
user string
ipcNsCtrNullStr sql.NullString
mountNsCtrNullStr sql.NullString
netNsCtrNullStr sql.NullString
pidNsCtrNullStr sql.NullString
userNsCtrNullStr sql.NullString
utsNsCtrNullStr sql.NullString
ipcNsCtrNullStr sql.NullString
mountNsCtrNullStr sql.NullString
netNsCtrNullStr sql.NullString
pidNsCtrNullStr sql.NullString
userNsCtrNullStr sql.NullString
utsNsCtrNullStr sql.NullString
cgroupNsCtrNullStr sql.NullString
createNetNS int
portMappingsJSON string
createNetNS int
dnsServerJSON string
dnsSearchJSON string
dnsOptionJSON string
hostAddJSON string
stdin int
labelsJSON string
@ -396,6 +418,8 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
&staticDir,
&mounts,
&privileged,
&noNewPrivs,
&processLabel,
&mountLabel,
&user,
@ -406,9 +430,13 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
&pidNsCtrNullStr,
&userNsCtrNullStr,
&utsNsCtrNullStr,
&cgroupNsCtrNullStr,
&createNetNS,
&portMappingsJSON,
&dnsServerJSON,
&dnsSearchJSON,
&dnsOptionJSON,
&hostAddJSON,
&stdin,
&labelsJSON,
@ -453,6 +481,8 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
ctr.config.ShmSize = shmSize
ctr.config.StaticDir = staticDir
ctr.config.Privileged = boolFromSQL(privileged)
ctr.config.NoNewPrivs = boolFromSQL(noNewPrivs)
ctr.config.ProcessLabel = processLabel
ctr.config.MountLabel = mountLabel
ctr.config.User = user
@ -463,6 +493,7 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
ctr.config.PIDNsCtr = stringFromNullString(pidNsCtrNullStr)
ctr.config.UserNsCtr = stringFromNullString(userNsCtrNullStr)
ctr.config.UTSNsCtr = stringFromNullString(utsNsCtrNullStr)
ctr.config.CgroupNsCtr = stringFromNullString(cgroupNsCtrNullStr)
ctr.config.CreateNetNS = boolFromSQL(createNetNS)
@ -490,8 +521,20 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
return nil, errors.Wrapf(err, "error parsing container %s mounts JSON", id)
}
if err := json.Unmarshal([]byte(portMappingsJSON), &ctr.config.PortMappings); err != nil {
return nil, errors.Wrapf(err, "error parsing container %s port mappings JSON", id)
if err := json.Unmarshal([]byte(dnsServerJSON), &ctr.config.DNSServer); err != nil {
return nil, errors.Wrapf(err, "error parsing container %s DNS server JSON", id)
}
if err := json.Unmarshal([]byte(dnsSearchJSON), &ctr.config.DNSSearch); err != nil {
return nil, errors.Wrapf(err, "error parsing container %s DNS search JSON", id)
}
if err := json.Unmarshal([]byte(dnsOptionJSON), &ctr.config.DNSOption); err != nil {
return nil, errors.Wrapf(err, "error parsing container %s DNS option JSON", id)
}
if err := json.Unmarshal([]byte(hostAddJSON), &ctr.config.HostAdd); err != nil {
return nil, errors.Wrapf(err, "error parsing container %s DNS server JSON", id)
}
labels := make(map[string]string)
@ -550,5 +593,25 @@ func (s *SQLState) ctrFromScannable(row scannable) (*Container, error) {
}
ctr.config.Spec = ociSpec
// Retrieve the ports from disk
// They may not exist - if they don't, this container just doesn't have ports
portPath := getPortsPath(s.specsDir, id)
_, err = os.Stat(portPath)
if err != nil {
if !os.IsNotExist(err) {
return nil, errors.Wrapf(err, "error stating container %s JSON ports", id)
}
}
if err == nil {
// The file exists, read it
fileContents, err := ioutil.ReadFile(portPath)
if err != nil {
return nil, errors.Wrapf(err, "error reading container %s JSON ports", id)
}
if err := json.Unmarshal(fileContents, &ctr.config.PortMappings); err != nil {
return nil, errors.Wrapf(err, "error parsing container %s JSON ports", id)
}
}
return ctr, nil
}