start: failed to start Tarantool 3 with encrypted etcd

[DifferentialOrange]

Config file:

config:
  etcd:
    endpoints:
    - https://localhost:2379
    ssl:
      verify_peer: false
      ca_file: /home/moiseevgeorgy/Development/github/tarantool/cluster-federation/test/integration/ssl_cert/ca.crt
      ssl_key: /home/moiseevgeorgy/Development/github/tarantool/cluster-federation/test/integration/ssl_cert/localhost.key
      ca_path: /home/moiseevgeorgy/Development/github/tarantool/cluster-federation/test/integration/ssl_cert
      verify_host: false
      ssl_cert: /home/moiseevgeorgy/Development/github/tarantool/cluster-federation/test/integration/ssl_cert/localhost.crt
    prefix: /cluster_a/

tt start test_app

   ⨯ can't collect instance information for test_app: error loading instance "cluster_a-storage-2-2" configuration from config "/home/moiseevgeorgy/Development/github/tarantool/cluster-federation/instances.enabled/test_app/config.yaml": unable to connect to etcd: fail to create tls client config: KeyFile and CertFile must both be present[key: /home/moiseevgeorgy/Development/github/tarantool/cluster-federation/test/integration/ssl_cert/localhost.key, cert: ]

[oleg-jukovec]

tt/lib/cluster/paths.go

Lines 49 to 54 in ba846d8

	[]string{"config", "etcd", "ssl", "ca_file"},
	[]string{"config", "etcd", "ssl", "ca_path"},
	[]string{"config", "etcd", "ssl", "ssl_cert"},
	[]string{"config", "etcd", "ssl", "ssl_key"},
	[]string{"config", "etcd", "ssl", "verify_host"},
	[]string{"config", "etcd", "ssl", "verify_peer"},

We need to rename cert_file -> ssl_cert:

tt/lib/cluster/cluster.go

Lines 130 to 137 in ba846d8

	Ssl struct {
	KeyFile string `yaml:"ssl_key"`
	CertFile string `yaml:"cert_file"`
	CaPath string `yaml:"ca_path"`
	CaFile string `yaml:"ca_file"`
	VerifyPeer bool `yaml:"verify_peer"`
	VerifyHost bool `yaml:"verify_host"`
	} `yaml:"ssl"`