func (manifest Manifest) SetJobInstanceCount(jobName string, count int) (Manifest, error) {
job, err := findJob(manifest, jobName)
if err != nil {
return Manifest{}, err
}
job.Instances = count
if len(job.Networks) == 0 {
return Manifest{}, fmt.Errorf("%q job must have an existing network to modify", jobName)
}
network := job.Networks[0]
if count == 0 {
job.Networks[0].StaticIPs = []string{}
return manifest, nil
}
if len(network.StaticIPs) == 0 {
return Manifest{}, fmt.Errorf("%q job must have at least one static ip in its network", jobName)
}
firstIP, err := core.ParseIP(network.StaticIPs[0])
if err != nil {
return Manifest{}, err
}
lastIP := firstIP.Add(count - 1)
job.Networks[0].StaticIPs = firstIP.To(lastIP)
return manifest, nil
}
func (manifest ManifestV2) SetInstanceCount(instance string, count int) (ManifestV2, error) {
instanceGroup, err := manifest.GetInstanceGroup(instance)
if err != nil {
return ManifestV2{}, err
}
instanceGroup.Instances = count
if count == 0 {
instanceGroup.Networks[0].StaticIPs = []string{}
return manifest, nil
}
network := instanceGroup.Networks[0]
firstIP, err := core.ParseIP(network.StaticIPs[0])
if err != nil {
return ManifestV2{}, err
}
lastIP := firstIP.Add(count - 1)
instanceGroup.Networks[0].StaticIPs = firstIP.To(lastIP)
return manifest, nil
}
package core_test
import (
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/pivotal-cf-experimental/destiny/core"
)
var _ = Describe("IP", func() {
Describe("ParseIP", func() {
It("returns an IP object that represents IP from string", func() {
ip, err := core.ParseIP("10.0.16.255")
Expect(err).NotTo(HaveOccurred())
Expect(ip.String()).To(Equal("10.0.16.255"))
})
Context("failure cases", func() {
It("returns an error if it cannot parse ip", func() {
_, err := core.ParseIP("not valid")
Expect(err).To(MatchError(ContainSubstring("not a valid ip address")))
})
It("returns an error if ip parts are not digits", func() {
_, err := core.ParseIP("x.x.x.x")
Expect(err).To(MatchError(ContainSubstring("invalid syntax")))
})
It("returns an error if ip parts are out of the allowed range", func() {
_, err := core.ParseIP("999.999.999.999")
Expect(err).To(MatchError(ContainSubstring("values out of range")))
})