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86 lines
2.2 KiB
86 lines
2.2 KiB
5 years ago
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package lich
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import (
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"fmt"
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"log"
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"net"
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"strconv"
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"strings"
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"database/sql"
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// Register go-sql-driver stuff
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_ "github.com/go-sql-driver/mysql"
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)
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var healthchecks = map[string]func(*Container) error{"mysql": checkMysql, "mariadb": checkMysql}
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// Healthcheck check container health.
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func (c *Container) Healthcheck() (err error) {
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if status, health := c.State.Status, c.State.Health.Status; !c.State.Running || (health != "" && health != "healthy") {
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err = fmt.Errorf("service: %s | container: %s not running", c.GetImage(), c.GetID())
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log.Printf("docker status(%s) health(%s) error(%v)", status, health, err)
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return
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}
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if check, ok := healthchecks[c.GetImage()]; ok {
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err = check(c)
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return
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}
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for proto, ports := range c.NetworkSettings.Ports {
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if id := c.GetID(); !strings.Contains(proto, "tcp") {
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log.Printf("container: %s proto(%s) unsupported.", id, proto)
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continue
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}
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for _, pulish := range ports {
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var (
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ip = net.ParseIP(pulish.HostIP)
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port, _ = strconv.Atoi(pulish.HostPort)
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tcpAddr = &net.TCPAddr{IP: ip, Port: port}
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tcpConn *net.TCPConn
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)
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if tcpConn, err = net.DialTCP("tcp", nil, tcpAddr); err != nil {
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log.Printf("net.DialTCP(%s:%s) error(%v)", pulish.HostIP, pulish.HostPort, err)
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return
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}
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tcpConn.Close()
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}
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}
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return
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}
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func checkMysql(c *Container) (err error) {
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var ip, port, user, passwd string
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for _, env := range c.Config.Env {
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splits := strings.Split(env, "=")
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if strings.Contains(splits[0], "MYSQL_ROOT_PASSWORD") {
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user, passwd = "root", splits[1]
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continue
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}
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if strings.Contains(splits[0], "MYSQL_ALLOW_EMPTY_PASSWORD") {
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user, passwd = "root", ""
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continue
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}
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if strings.Contains(splits[0], "MYSQL_USER") {
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user = splits[1]
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continue
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}
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if strings.Contains(splits[0], "MYSQL_PASSWORD") {
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passwd = splits[1]
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continue
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}
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}
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var db *sql.DB
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if ports, ok := c.NetworkSettings.Ports["3306/tcp"]; ok {
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ip, port = ports[0].HostIP, ports[0].HostPort
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}
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var dsn = fmt.Sprintf("%s:%s@tcp(%s:%s)/", user, passwd, ip, port)
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if db, err = sql.Open("mysql", dsn); err != nil {
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log.Printf("sql.Open(mysql) dsn(%s) error(%v)", dsn, err)
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return
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}
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if err = db.Ping(); err != nil {
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log.Printf("ping(db) dsn(%s) error(%v)", dsn, err)
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}
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defer db.Close()
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return
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}
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