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f9e594fbad
When using parallel before, multiple PostgreSQL containers would
unintentionally interfere with the other's data. This ensures
both containers have separated data, and don't create a volume.
🌮 @bryphe-coder for the idea!
79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
package postgres
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import (
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"database/sql"
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"fmt"
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"io/ioutil"
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"os"
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"time"
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"github.com/ory/dockertest/v3"
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"github.com/ory/dockertest/v3/docker"
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"golang.org/x/xerrors"
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)
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// Open creates a new PostgreSQL server using a Docker container.
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func Open() (string, func(), error) {
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pool, err := dockertest.NewPool("")
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if err != nil {
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return "", nil, xerrors.Errorf("create pool: %w", err)
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}
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tempDir, err := ioutil.TempDir(os.TempDir(), "postgres")
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if err != nil {
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return "", nil, xerrors.Errorf("create tempdir: %w", err)
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}
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resource, err := pool.RunWithOptions(&dockertest.RunOptions{
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Repository: "postgres",
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Tag: "11",
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Env: []string{
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"POSTGRES_PASSWORD=postgres",
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"POSTGRES_USER=postgres",
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"POSTGRES_DB=postgres",
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// The location for temporary database files!
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"PGDATA=/tmp",
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"listen_addresses = '*'",
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},
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Mounts: []string{
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// The postgres image has a VOLUME parameter in it's image.
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// If we don't mount at this point, Docker will allocate a
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// volume for this directory.
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//
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// This isn't used anyways, since we override PGDATA.
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fmt.Sprintf("%s:/var/lib/postgresql/data", tempDir),
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},
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}, func(config *docker.HostConfig) {
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// set AutoRemove to true so that stopped container goes away by itself
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config.AutoRemove = true
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config.RestartPolicy = docker.RestartPolicy{Name: "no"}
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})
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if err != nil {
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return "", nil, xerrors.Errorf("could not start resource: %w", err)
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}
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hostAndPort := resource.GetHostPort("5432/tcp")
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dbURL := fmt.Sprintf("postgres://postgres:postgres@%s/postgres?sslmode=disable", hostAndPort)
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// Docker should hard-kill the container after 120 seconds.
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err = resource.Expire(120)
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if err != nil {
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return "", nil, xerrors.Errorf("could not expire resource: %w", err)
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}
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pool.MaxWait = 120 * time.Second
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err = pool.Retry(func() error {
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db, err := sql.Open("postgres", dbURL)
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if err != nil {
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return err
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}
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err = db.Ping()
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_ = db.Close()
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return err
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})
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if err != nil {
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return "", nil, err
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}
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return dbURL, func() {
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_ = pool.Purge(resource)
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_ = os.RemoveAll(tempDir)
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}, nil
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}
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