open-nomad/jobspec2/parse_test.go
Tim Gross daf1c8a0f6 hcl2: avoid panic on unset variable
Variables that are unset return the correct diagnostic but throw a panic when
we later parse the job body. Return early if there are any variable parsing
errors instead of continuing in a potentially invalid state.
2021-02-18 10:48:56 -05:00

847 lines
16 KiB
Go

package jobspec2
import (
"io/ioutil"
"os"
"strings"
"testing"
"github.com/hashicorp/nomad/api"
"github.com/hashicorp/nomad/jobspec"
"github.com/stretchr/testify/require"
)
func TestEquivalentToHCL1(t *testing.T) {
hclSpecDir := "../jobspec/test-fixtures/"
fis, err := ioutil.ReadDir(hclSpecDir)
require.NoError(t, err)
for _, fi := range fis {
name := fi.Name()
t.Run(name, func(t *testing.T) {
f, err := os.Open(hclSpecDir + name)
require.NoError(t, err)
defer f.Close()
job1, err := jobspec.Parse(f)
if err != nil {
t.Skip("file is not parsable in v1")
}
f.Seek(0, 0)
job2, err := Parse(name, f)
require.NoError(t, err)
require.Equal(t, job1, job2)
})
}
}
func TestEquivalentToHCL1_ComplexConfig(t *testing.T) {
name := "./test-fixtures/config-compatibility.hcl"
f, err := os.Open(name)
require.NoError(t, err)
defer f.Close()
job1, err := jobspec.Parse(f)
require.NoError(t, err)
f.Seek(0, 0)
job2, err := Parse(name, f)
require.NoError(t, err)
require.Equal(t, job1, job2)
}
func TestParse_VarsAndFunctions(t *testing.T) {
hcl := `
variables {
region_var = "default"
}
job "example" {
datacenters = [for s in ["dc1", "dc2"] : upper(s)]
region = var.region_var
}
`
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: []string{"region_var=aug"},
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"DC1", "DC2"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "aug", *out.Region)
}
func TestParse_VariablesDefaultsAndSet(t *testing.T) {
hcl := `
variables {
region_var = "default_region"
}
variable "dc_var" {
default = "default_dc"
}
job "example" {
datacenters = [var.dc_var]
region = var.region_var
}
`
t.Run("defaults", func(t *testing.T) {
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"default_dc"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "default_region", *out.Region)
})
t.Run("set via -var args", func(t *testing.T) {
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: []string{"dc_var=set_dc", "region_var=set_region"},
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"set_dc"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "set_region", *out.Region)
})
t.Run("set via envvars", func(t *testing.T) {
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
Envs: []string{
"NOMAD_VAR_dc_var=set_dc",
"NOMAD_VAR_region_var=set_region",
},
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"set_dc"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "set_region", *out.Region)
})
t.Run("set via var-files", func(t *testing.T) {
varFile, err := ioutil.TempFile("", "")
require.NoError(t, err)
defer os.Remove(varFile.Name())
content := `dc_var = "set_dc"
region_var = "set_region"`
_, err = varFile.WriteString(content)
require.NoError(t, err)
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
VarFiles: []string{varFile.Name()},
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"set_dc"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "set_region", *out.Region)
})
}
// TestParse_UnknownVariables asserts that unknown variables are left intact for further processing
func TestParse_UnknownVariables(t *testing.T) {
hcl := `
variables {
region_var = "default"
}
job "example" {
datacenters = [for s in ["dc1", "dc2"] : upper(s)]
region = var.region_var
meta {
known_var = "${var.region_var}"
unknown_var = "${UNKNOWN}"
}
}
`
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: []string{"region_var=aug"},
AllowFS: true,
})
require.NoError(t, err)
meta := map[string]string{
"known_var": "aug",
"unknown_var": "${UNKNOWN}",
}
require.Equal(t, meta, out.Meta)
}
// TestParse_UnsetVariables asserts that variables that have neither types nor
// values return early instead of panicking.
func TestParse_UnsetVariables(t *testing.T) {
hcl := `
variable "region_var" {}
job "example" {
datacenters = [for s in ["dc1", "dc2"] : upper(s)]
region = var.region_var
}
`
_, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: []string{},
AllowFS: true,
})
require.Error(t, err)
require.Contains(t, err.Error(), "Unset variable")
}
func TestParse_Locals(t *testing.T) {
hcl := `
variables {
region_var = "default_region"
}
locals {
# literal local
dc = "local_dc"
# local that depends on a variable
region = "${var.region_var}.example"
}
job "example" {
datacenters = [local.dc]
region = local.region
}
`
t.Run("defaults", func(t *testing.T) {
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"local_dc"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "default_region.example", *out.Region)
})
t.Run("set via -var argments", func(t *testing.T) {
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: []string{"region_var=set_region"},
AllowFS: true,
})
require.NoError(t, err)
require.Equal(t, []string{"local_dc"}, out.Datacenters)
require.NotNil(t, out.Region)
require.Equal(t, "set_region.example", *out.Region)
})
}
func TestParse_FileOperators(t *testing.T) {
hcl := `
job "example" {
region = file("parse_test.go")
}
`
t.Run("enabled", func(t *testing.T) {
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: nil,
AllowFS: true,
})
require.NoError(t, err)
expected, err := ioutil.ReadFile("parse_test.go")
require.NoError(t, err)
require.NotNil(t, out.Region)
require.Equal(t, string(expected), *out.Region)
})
t.Run("disabled", func(t *testing.T) {
_, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: nil,
AllowFS: false,
})
require.Error(t, err)
require.Contains(t, err.Error(), "filesystem function disabled")
})
}
func TestParseDynamic(t *testing.T) {
hcl := `
job "example" {
dynamic "group" {
for_each = [
{ name = "groupA", idx = 1 },
{ name = "groupB", idx = 2 },
{ name = "groupC", idx = 3 },
]
labels = [group.value.name]
content {
count = group.value.idx
service {
port = group.value.name
}
task "simple" {
driver = "raw_exec"
config {
command = group.value.name
}
meta {
VERSION = group.value.idx
}
env {
ID = format("id:%s", group.value.idx)
}
resources {
cpu = group.value.idx
}
}
}
}
}
`
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
ArgVars: nil,
AllowFS: false,
})
require.NoError(t, err)
require.Len(t, out.TaskGroups, 3)
require.Equal(t, "groupA", *out.TaskGroups[0].Name)
require.Equal(t, "groupB", *out.TaskGroups[1].Name)
require.Equal(t, "groupC", *out.TaskGroups[2].Name)
require.Equal(t, 1, *out.TaskGroups[0].Tasks[0].Resources.CPU)
require.Equal(t, "groupA", out.TaskGroups[0].Services[0].PortLabel)
// interpolation inside maps
require.Equal(t, "groupA", out.TaskGroups[0].Tasks[0].Config["command"])
require.Equal(t, "1", out.TaskGroups[0].Tasks[0].Meta["VERSION"])
require.Equal(t, "id:1", out.TaskGroups[0].Tasks[0].Env["ID"])
require.Equal(t, "id:2", out.TaskGroups[1].Tasks[0].Env["ID"])
require.Equal(t, "3", out.TaskGroups[2].Tasks[0].Meta["VERSION"])
}
func TestParse_InvalidScalingSyntax(t *testing.T) {
cases := []struct {
name string
expectedErr string
hcl string
}{
{
"valid",
"",
`
job "example" {
group "g1" {
scaling {
max = 40
type = "horizontal"
}
task "t1" {
scaling "cpu" {
max = 20
}
scaling "mem" {
max = 15
}
}
}
}
`,
},
{
"group missing max",
`argument "max" is required`,
`
job "example" {
group "g1" {
scaling {
#max = 40
type = "horizontal"
}
task "t1" {
scaling "cpu" {
max = 20
}
scaling "mem" {
max = 15
}
}
}
}
`,
},
{
"group invalid type",
`task group scaling policy had invalid type`,
`
job "example" {
group "g1" {
scaling {
max = 40
type = "invalid_type"
}
task "t1" {
scaling "cpu" {
max = 20
}
scaling "mem" {
max = 15
}
}
}
}
`,
},
{
"task invalid label",
`scaling policy name must be "cpu" or "mem"`,
`
job "example" {
group "g1" {
scaling {
max = 40
type = "horizontal"
}
task "t1" {
scaling "not_cpu" {
max = 20
}
scaling "mem" {
max = 15
}
}
}
}
`,
},
{
"task duplicate blocks",
`Duplicate scaling "cpu" block`,
`
job "example" {
group "g1" {
scaling {
max = 40
type = "horizontal"
}
task "t1" {
scaling "cpu" {
max = 20
}
scaling "cpu" {
max = 15
}
}
}
}
`,
},
{
"task invalid type",
`Invalid scaling policy type`,
`
job "example" {
group "g1" {
scaling {
max = 40
type = "horizontal"
}
task "t1" {
scaling "cpu" {
max = 20
type = "invalid"
}
scaling "mem" {
max = 15
}
}
}
}
`,
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
_, err := ParseWithConfig(&ParseConfig{
Path: c.name + ".hcl",
Body: []byte(c.hcl),
AllowFS: false,
})
if c.expectedErr == "" {
require.NoError(t, err)
} else {
require.Error(t, err)
require.Contains(t, err.Error(), c.expectedErr)
}
})
}
}
func TestParseJob_JobWithFunctionsAndLookups(t *testing.T) {
hcl := `
variable "env" {
description = "target environment for the job"
}
locals {
environments = {
prod = { count = 20, dcs = ["prod-dc1", "prod-dc2"] },
staging = { count = 3, dcs = ["dc1"] },
}
env = lookup(local.environments, var.env, { count = 0, dcs = [] })
}
job "job-webserver" {
datacenters = local.env.dcs
group "group-webserver" {
count = local.env.count
task "server" {
driver = "docker"
config {
image = "hashicorp/http-echo"
args = ["-text", "Hello from ${var.env}"]
}
}
}
}
`
cases := []struct {
env string
expectedJob *api.Job
}{
{
"prod",
&api.Job{
ID: stringToPtr("job-webserver"),
Name: stringToPtr("job-webserver"),
Datacenters: []string{"prod-dc1", "prod-dc2"},
TaskGroups: []*api.TaskGroup{
{
Name: stringToPtr("group-webserver"),
Count: intToPtr(20),
Tasks: []*api.Task{
{
Name: "server",
Driver: "docker",
Config: map[string]interface{}{
"image": "hashicorp/http-echo",
"args": []interface{}{"-text", "Hello from prod"},
},
},
},
},
},
},
},
{
"staging",
&api.Job{
ID: stringToPtr("job-webserver"),
Name: stringToPtr("job-webserver"),
Datacenters: []string{"dc1"},
TaskGroups: []*api.TaskGroup{
{
Name: stringToPtr("group-webserver"),
Count: intToPtr(3),
Tasks: []*api.Task{
{
Name: "server",
Driver: "docker",
Config: map[string]interface{}{
"image": "hashicorp/http-echo",
"args": []interface{}{"-text", "Hello from staging"},
},
},
},
},
},
},
},
{
"unknown",
&api.Job{
ID: stringToPtr("job-webserver"),
Name: stringToPtr("job-webserver"),
Datacenters: []string{},
TaskGroups: []*api.TaskGroup{
{
Name: stringToPtr("group-webserver"),
Count: intToPtr(0),
Tasks: []*api.Task{
{
Name: "server",
Driver: "docker",
Config: map[string]interface{}{
"image": "hashicorp/http-echo",
"args": []interface{}{"-text", "Hello from unknown"},
},
},
},
},
},
},
},
}
for _, c := range cases {
t.Run(c.env, func(t *testing.T) {
found, err := ParseWithConfig(&ParseConfig{
Path: "example.hcl",
Body: []byte(hcl),
AllowFS: false,
ArgVars: []string{"env=" + c.env},
})
require.NoError(t, err)
require.Equal(t, c.expectedJob, found)
})
}
}
func TestParse_TaskEnvs(t *testing.T) {
cases := []struct {
name string
envSnippet string
expected map[string]string
}{
{
"none",
``,
nil,
},
{
"block",
`
env {
key = "value"
} `,
map[string]string{"key": "value"},
},
{
"attribute",
`
env = {
"key.dot" = "val1"
key_unquoted_without_dot = "val2"
} `,
map[string]string{"key.dot": "val1", "key_unquoted_without_dot": "val2"},
},
{
"attribute_colons",
`env = {
"key.dot" : "val1"
key_unquoted_without_dot : "val2"
} `,
map[string]string{"key.dot": "val1", "key_unquoted_without_dot": "val2"},
},
{
"attribute_empty",
`env = {}`,
map[string]string{},
},
{
"attribute_expression",
`env = {for k in ["a", "b"]: k => "val-${k}" }`,
map[string]string{"a": "val-a", "b": "val-b"},
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
hcl := `
job "example" {
group "group" {
task "task" {
driver = "docker"
config {}
` + c.envSnippet + `
}
}
}`
out, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
})
require.NoError(t, err)
require.Equal(t, c.expected, out.TaskGroups[0].Tasks[0].Env)
})
}
}
func TestParse_TaskEnvs_Multiple(t *testing.T) {
hcl := `
job "example" {
group "group" {
task "task" {
driver = "docker"
config {}
env = {"a": "b"}
env {
c = "d"
}
}
}
}`
_, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
})
require.Error(t, err)
require.Contains(t, err.Error(), "Duplicate env block")
}
func Test_TaskEnvs_Invalid(t *testing.T) {
cases := []struct {
name string
envSnippet string
expectedErr string
}{
{
"attr: invalid expression",
`env = { key = local.undefined_local }`,
`does not have an attribute named "undefined_local"`,
},
{
"block: invalid block expression",
`env {
for k in ["a", "b"]: k => k
}`,
"Invalid block definition",
},
{
"attr: not make sense",
`env = [ "a" ]`,
"Unsuitable value: map of string required",
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
hcl := `
job "example" {
group "group" {
task "task" {
driver = "docker"
config {}
` + c.envSnippet + `
}
}
}`
_, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
})
require.Error(t, err)
require.Contains(t, err.Error(), c.expectedErr)
})
}
}
func TestParse_Meta_Alternatives(t *testing.T) {
hcl := ` job "example" {
group "group" {
task "task" {
driver = "config"
config {}
meta {
source = "task"
}
}
meta {
source = "group"
}
}
meta {
source = "job"
}
}
`
asBlock, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hcl),
})
require.NoError(t, err)
hclAsAttr := strings.ReplaceAll(hcl, "meta {", "meta = {")
require.Equal(t, 3, strings.Count(hclAsAttr, "meta = {"))
asAttr, err := ParseWithConfig(&ParseConfig{
Path: "input.hcl",
Body: []byte(hclAsAttr),
})
require.NoError(t, err)
require.Equal(t, asBlock, asAttr)
require.Equal(t, map[string]string{"source": "job"}, asBlock.Meta)
require.Equal(t, map[string]string{"source": "group"}, asBlock.TaskGroups[0].Meta)
require.Equal(t, map[string]string{"source": "task"}, asBlock.TaskGroups[0].Tasks[0].Meta)
}