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v2postgres.go
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v2postgres.go
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package legacy
import (
"context"
"database/sql"
"fmt"
"github.com/chef/automate/components/authz-service/storage"
storage_errors "github.com/chef/automate/components/authz-service/storage"
constants "github.com/chef/automate/components/authz-service/storage/postgres/migration/legacy/constants/v2"
"github.com/lib/pq"
"github.com/pkg/errors"
)
func MigrationStatus(ctx context.Context, db *sql.DB) (isOnV1, isDirty bool, err error) {
var status string
row := db.QueryRowContext(ctx, `SELECT state FROM migration_status`)
err = row.Scan(&status)
if err != nil {
return false, false, err // shouldn't happen, migration initializes state
}
switch status {
case constants.EnumPristine:
return true, false, nil
case constants.EnumSuccessful:
return false, false, nil
case constants.EnumSuccessfulBeta1:
return false, false, nil
case constants.EnumInProgress:
return true, true, nil
case constants.EnumFailed:
return true, true, nil
}
return false, false, fmt.Errorf("unexpected migration status: %q", status)
}
func ResetIAMDb(ctx context.Context, db *sql.DB) error {
if _, err := db.ExecContext(ctx,
`TRUNCATE TABLE iam_policies, iam_members, iam_roles, iam_projects CASCADE;`); err != nil {
return errors.Wrap(err, "truncate database")
}
return nil
}
func RecordMigrationStatus(ctx context.Context, ms string, db *sql.DB) error {
_, err := db.ExecContext(ctx, `UPDATE migration_status SET state=$1`, ms)
return err
}
func createRole(ctx context.Context, db *sql.DB, role *v2Role) error {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
tx, err := db.BeginTx(ctx, nil /* use driver default */)
if err != nil {
return errors.Wrap(err, "begin create role tx")
}
row := tx.QueryRowContext(ctx, `INSERT INTO iam_roles (id, name, type, actions) VALUES ($1, $2, $3, $4)
RETURNING db_id`,
role.ID, role.Name, role.Type.String(), pq.Array(role.Actions))
var dbID string
if err := row.Scan(&dbID); err != nil {
return errors.Wrap(err, "insert role")
}
_, err = tx.ExecContext(ctx,
`INSERT INTO iam_role_projects (role_id, project_id)
SELECT $1, project_db_id(p) FROM unnest($2::TEXT[]) as p`,
dbID, pq.Array(role.Projects))
if err != nil {
return errors.Wrap(err, "insert role projects")
}
err = tx.Commit()
if err != nil {
return storage_errors.NewTxCommitError(err)
}
return nil
}
func createV2Policy(ctx context.Context, db *sql.DB, pol *v2Policy) (*v2Policy, error) {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
tx, err := db.BeginTx(ctx, nil /* use driver default */)
if err != nil {
return nil, errors.Wrap(err, "createV2Policy")
}
projects := pol.Projects
if projects == nil {
projects = []string{}
}
if err := insertCompletePolicy(ctx, pol, projects, tx); err != nil {
return nil, err
}
err = tx.Commit()
if err != nil {
return nil, storage_errors.NewTxCommitError(err)
}
// Currently, we don't change anything from what is passed in.
return pol, nil
}
func insertCompletePolicy(ctx context.Context, pol *v2Policy, projects []string, tx *sql.Tx) error {
if err := insertPolicyWithQuerier(ctx, pol, tx); err != nil {
return err
}
if err := associatePolicyWithProjects(ctx, pol.ID, projects, tx); err != nil {
return err
}
if err := insertPolicyStatementsWithQuerier(ctx, pol.ID, pol.Statements, tx); err != nil {
return err
}
return nil
}
func insertPolicyWithQuerier(ctx context.Context, inputPol *v2Policy, tx *sql.Tx) error {
_, err := tx.ExecContext(ctx,
`SELECT insert_iam_policy($1, $2, $3);`,
inputPol.ID, inputPol.Name, inputPol.Type.String(),
)
if err != nil {
if err, ok := err.(*pq.Error); ok {
switch err.Code {
case "23505": // Unique violation
return storage.ErrConflict
}
}
return errors.Wrap(storage.ErrDatabase, "insertPolicyWithQuerier")
}
err = replacePolicyMembersWithQuerier(ctx, inputPol.ID, inputPol.Members, tx)
return errors.Wrap(err, "replace policy members")
}
func replacePolicyMembersWithQuerier(ctx context.Context, policyID string, members []v2Member,
tx *sql.Tx) error {
// Cascade delete any existing members.
_, err := tx.ExecContext(ctx,
`DELETE FROM iam_policy_members WHERE policy_id=policy_db_id($1);`, policyID)
if err != nil {
return errors.Wrap(err, "replacePolicyMembersWithQuerier")
}
// Insert new members.
for _, member := range members {
err = insertOrReusePolicyMemberWithQuerier(ctx, policyID, member, tx)
if err != nil {
return errors.Wrap(err, "replacePolicyMembersWithQuerier")
}
}
return nil
}
func insertOrReusePolicyMemberWithQuerier(ctx context.Context, policyID string, member v2Member,
tx *sql.Tx) error {
// First, we insert the member but on conflict do nothing. Then, we insert the member
// into the policy. This is safe to do non-transactionally right now, since we don't support
// updating either iam_members id or name columns which is the entire table. Also, we are currently
// not deleting any of the rows, but reusing them per name string.
_, err := tx.ExecContext(ctx,
"INSERT INTO iam_members (name) VALUES ($1) ON CONFLICT DO NOTHING",
member.Name)
if err != nil {
return errors.Wrapf(err, "failed to upsert member %s", member.Name)
}
// Ignore conflicts if someone is trying to add a user that is already a member.
_, err = tx.ExecContext(ctx,
`INSERT INTO iam_policy_members (policy_id, member_id)
VALUES (policy_db_id($1), member_db_id($2)) ON CONFLICT DO NOTHING`, policyID, member.Name)
return errors.Wrapf(err, "failed to upsert member link: member=%s, policy_id=%s", member.Name, policyID)
}
func associatePolicyWithProjects(ctx context.Context,
policyID string, inProjects []string,
tx *sql.Tx) error {
// Drop any existing associations.
_, err := tx.ExecContext(ctx,
"DELETE FROM iam_policy_projects WHERE policy_id=policy_db_id($1)", policyID)
if err != nil {
return err
}
for _, project := range inProjects {
_, err := tx.ExecContext(ctx,
`INSERT INTO iam_policy_projects (policy_id, project_id) VALUES (policy_db_id($1), project_db_id($2))`,
&policyID, &project)
if err != nil {
return errors.Wrap(err, "associatePolicyWithProjects")
}
}
return nil
}
func insertPolicyStatementsWithQuerier(ctx context.Context,
policyID string, inputStatements []v2Statement,
tx *sql.Tx) error {
for _, s := range inputStatements {
_, err := tx.ExecContext(ctx,
`SELECT insert_iam_statement_into_policy($1, $2, $3, $4, $5, $6);`,
policyID, s.Effect.String(), pq.Array(s.Actions),
pq.Array(s.Resources), s.Role, pq.Array(s.Projects),
)
if err != nil {
return errors.Wrap(err, "insertPolicyStatementsWithQuerier")
}
}
return nil
}
func addPolicyMembers(ctx context.Context, db *sql.DB, id string, members []v2Member) ([]v2Member, error) {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
tx, err := db.BeginTx(ctx, nil /* use driver default */)
if err != nil {
return nil, errors.Wrap(err, "addPolicyMembers")
}
// Project filtering handled in here. We'll return a 404 right away if we can't find
// the policy via ID as filtered by projects.
_, err = queryPolicy(ctx, id, tx)
if err != nil {
return nil, errors.Wrap(err, "addPolicyMembers")
}
for _, member := range members {
err := insertOrReusePolicyMemberWithQuerier(ctx, id, member, tx)
if err != nil {
return nil, errors.Wrap(err, "addPolicyMembers")
}
}
members, err = getPolicyMembersWithQuerier(ctx, id, tx)
if err != nil {
return nil, errors.Wrap(err, "addPolicyMembers")
}
err = tx.Commit()
if err != nil {
return nil, storage_errors.NewTxCommitError(err)
}
return members, nil
}
func getPolicyMembersWithQuerier(ctx context.Context, id string, tx *sql.Tx) ([]v2Member, error) {
rows, err := tx.QueryContext(ctx,
`SELECT m.name FROM iam_policy_members AS pm
JOIN iam_members AS m ON pm.member_id=m.db_id
WHERE pm.policy_id=policy_db_id($1) ORDER BY m.name ASC`, id)
if err != nil {
return nil, err
}
defer func() {
rows.Close() // nolint: errcheck
}()
members := []v2Member{}
for rows.Next() {
var member v2Member
if err := rows.Scan(&member.Name); err != nil {
return nil, errors.Wrap(err, "getPolicyMembersWithQuerier")
}
members = append(members, member)
}
if err := rows.Err(); err != nil {
return nil, errors.Wrap(err, "error retrieving result rows")
}
return members, nil
}
func queryPolicy(ctx context.Context, id string, tx *sql.Tx) (*v2Policy, error) {
var pol v2Policy
query := "SELECT query_policy($1, $2)"
r := tx.QueryRowContext(ctx, query, id, pq.Array([]string{}))
if err := r.Scan(&pol); err != nil {
return nil, err
}
return &pol, nil
}