def api_relation_changed():
"""
On the relation to the api server, this function determines the appropriate
architecture and the configured version to copy the kubernetes binary files
from the kubernetes-master charm and installs it locally on this machine.
"""
hookenv.log('Starting api-relation-changed')
charm_dir = Path(hookenv.charm_dir())
# Get the package architecture, rather than the from the kernel (uname -m).
arch = subprocess.check_output(['dpkg', '--print-architecture']).strip()
kubernetes_bin_dir = Path('/opt/kubernetes/bin')
# Get the version of kubernetes to install.
version = subprocess.check_output(['relation-get', 'version']).strip()
print('Relation version: ', version)
if not version:
print('No version present in the relation.')
exit(0)
version_file = charm_dir / '.version'
if version_file.exists():
previous_version = version_file.text()
print('Previous version: ', previous_version)
if version == previous_version:
exit(0)
# Can not download binaries while the service is running, so stop it.
# TODO: Figure out a better way to handle upgraded kubernetes binaries.
for service in ('kubelet', 'proxy'):
if host.service_running(service):
host.service_stop(service)
command = ['relation-get', 'private-address']
# Get the kubernetes-master address.
server = subprocess.check_output(command).strip()
print('Kubernetes master private address: ', server)
installer = KubernetesInstaller(arch, version, server, kubernetes_bin_dir)
installer.download()
installer.install()
# Write the most recently installed version number to the file.
version_file.write_text(version)
relation_changed()
def config_changed():
"""
On the execution of the juju event 'config-changed' this function
determines the appropriate architecture and the configured version to
create kubernetes binary files.
"""
hookenv.log('Starting config-changed')
charm_dir = path(hookenv.charm_dir())
config = hookenv.config()
# Get the version of kubernetes to install.
version = config['version']
# Get the package architecture, rather than the from the kernel (uname -m).
arch = subprocess.check_output(['dpkg', '--print-architecture']).strip()
kubernetes_dir = path('/opt/kubernetes')
if not kubernetes_dir.exists():
print('The source directory {0} does not exist'.format(kubernetes_dir))
print('Was the kubernetes code cloned during install?')
exit(1)
if version in ['source', 'head', 'master']:
branch = 'master'
else:
# Create a branch to a tag.
branch = 'tags/{0}'.format(version)
# Construct the path to the binaries using the arch.
output_path = kubernetes_dir / '_output/local/bin/linux' / arch
installer = KubernetesInstaller(arch, version, output_path)
# Change to the kubernetes directory (git repository).
with kubernetes_dir:
# Create a command to get the current branch.
git_branch = 'git branch | grep "\*" | cut -d" " -f2'
current_branch = subprocess.check_output(git_branch, shell=True).strip()
print('Current branch: ', current_branch)
# Create the path to a file to indicate if the build was broken.
broken_build = charm_dir / '.broken_build'
# write out the .broken_build file while this block is executing.
with check_sentinel(broken_build) as last_build_failed:
print('Last build failed: ', last_build_failed)
# Rebuild if the current version is different or last build failed.
if current_branch != version or last_build_failed:
installer.build(branch)
if not output_path.exists():
broken_build.touch()
else:
print('Notifying minions of verison ' + version)
# Notify the minions of a version change.
for r in hookenv.relation_ids('minions-api'):
hookenv.relation_set(r, version=version)
print('Done notifing minions of version ' + version)
# Create the symoblic links to the right directories.
installer.install()
relation_changed()
hookenv.log('The config-changed hook completed successfully.')
def api_relation_changed():
"""
On the relation to the api server, this function determines the appropriate
architecture and the configured version to copy the kubernetes binary files
from the kubernetes-master charm and installs it locally on this machine.
"""
hookenv.log('Starting api-relation-changed')
charm_dir = path(hookenv.charm_dir())
# Get the package architecture, rather than the from the kernel (uname -m).
arch = subprocess.check_output(['dpkg', '--print-architecture']).strip()
kubernetes_bin_dir = path('/opt/kubernetes/bin')
# Get the version of kubernetes to install.
version = subprocess.check_output(['relation-get', 'version']).strip()
print('Relation version: ', version)
if not version:
print('No version present in the relation.')
exit(0)
version_file = charm_dir / '.version'
if version_file.exists():
previous_version = version_file.text()
print('Previous version: ', previous_version)
if version == previous_version:
exit(0)
# Can not download binaries while the service is running, so stop it.
# TODO: Figure out a better way to handle upgraded kubernetes binaries.
for service in ('kubelet', 'proxy'):
if host.service_running(service):
host.service_stop(service)
command = ['relation-get', 'private-address']
# Get the kubernetes-master address.
server = subprocess.check_output(command).strip()
print('Kubernetes master private address: ', server)
installer = KubernetesInstaller(arch, version, server, kubernetes_bin_dir)
installer.download()
installer.install()
# Write the most recently installed version number to the file.
version_file.write_text(version)
relation_changed()
def config_changed():
"""
On the execution of the juju event 'config-changed' this function
determines the appropriate architecture and the configured version to
create kubernetes binary files.
"""
hookenv.log('Starting config-changed')
charm_dir = Path(hookenv.charm_dir())
config = hookenv.config()
# Get the version of kubernetes to install.
version = config['version']
username = config['username']
password = config['password']
certificate = config['apiserver-cert']
key = config['apiserver-key']
if version == 'master':
# The 'master' branch of kuberentes is used when master is configured.
branch = 'master'
elif version == 'local':
# Check for kubernetes binaries in the local files/output directory.
branch = None
else:
# Create a branch to a tag to get the release version.
branch = 'tags/{0}'.format(version)
cert_file = '/srv/kubernetes/apiserver.crt'
key_file = '/srv/kubernetes/apiserver.key'
# When the cert or key changes we need to restart the apiserver.
if config.changed('apiserver-cert') or config.changed('apiserver-key'):
hookenv.log('Certificate or key has changed.')
if not certificate or not key:
generate_cert(key=key_file, cert=cert_file)
else:
hookenv.log('Writing new certificate and key to server.')
with open(key_file, 'w') as file:
file.write(key)
with open(cert_file, 'w') as file:
file.write(certificate)
# Restart apiserver as the certificate or key has changed.
if host.service_running('apiserver'):
host.service_restart('apiserver')
# Reload nginx because it proxies https to apiserver.
if host.service_running('nginx'):
host.service_reload('nginx')
if config.changed('username') or config.changed('password'):
hookenv.log('Username or password changed, creating authentication.')
basic_auth(username, username, password)
if host.service_running('apiserver'):
host.service_restart('apiserver')
# Get package architecture, rather than arch from the kernel (uname -m).
arch = subprocess.check_output(['dpkg', '--print-architecture']).strip()
if not branch:
output_path = charm_dir / 'files/output'
kube_installer = KubernetesInstaller(arch, version, output_path)
else:
# Build the kuberentes binaries from source on the units.
kubernetes_dir = Path('/opt/kubernetes')
# Construct the path to the binaries using the arch.
output_path = kubernetes_dir / '_output/local/bin/linux' / arch
kube_installer = KubernetesInstaller(arch, version, output_path)
if not kubernetes_dir.exists():
message = 'The kubernetes source directory {0} does not exist. ' \
'Was the kubernetes repository cloned during the install?'
print(message.format(kubernetes_dir))
exit(1)
# Change to the kubernetes directory (git repository).
with kubernetes_dir:
# Create a command to get the current branch.
git_branch = 'git branch | grep "\*" | cut -d" " -f2'
current_branch = subprocess.check_output(git_branch, shell=True)
current_branch = current_branch.strip()
print('Current branch: ', current_branch)
# Create the path to a file to indicate if the build was broken.
broken_build = charm_dir / '.broken_build'
# write out the .broken_build file while this block is executing.
with check_sentinel(broken_build) as last_build_failed:
print('Last build failed: ', last_build_failed)
# Rebuild if current version is different or last build failed.
if current_branch != version or last_build_failed:
kube_installer.build(branch)
if not output_path.isdir():
broken_build.touch()
# Create the symoblic links to the right directories.
kube_installer.install()
relation_changed()
hookenv.log('The config-changed hook completed successfully.')
def makeone(self, *args, **kw):
""" Create the KubernetesInstaller object and return it. """
from kubernetes_installer import KubernetesInstaller
return KubernetesInstaller(*args, **kw)
def config_changed():
"""
On the execution of the juju event 'config-changed' this function
determines the appropriate architecture and the configured version to
create kubernetes binary files.
"""
hookenv.log("Starting config-changed")
charm_dir = path(hookenv.charm_dir())
config = hookenv.config()
# Get the version of kubernetes to install.
version = config["version"]
if version == "master":
# The 'master' branch of kuberentes is used when master is configured.
branch = "master"
elif version == "local":
# Check for kubernetes binaries in the local files/output directory.
branch = None
else:
# Create a branch to a tag to get the release version.
branch = "tags/{0}".format(version)
# Get the package architecture, rather than arch from the kernel (uname -m).
arch = subprocess.check_output(["dpkg", "--print-architecture"]).strip()
if not branch:
output_path = charm_dir / "files/output"
installer = KubernetesInstaller(arch, version, output_path)
else:
# Build the kuberentes binaries from source on the units.
kubernetes_dir = path("/opt/kubernetes")
# Construct the path to the binaries using the arch.
output_path = kubernetes_dir / "_output/local/bin/linux" / arch
installer = KubernetesInstaller(arch, version, output_path)
if not kubernetes_dir.exists():
print ("The source directory {0} does not exist".format(kubernetes_dir))
print ("Was the kubernetes code cloned during install?")
exit(1)
# Change to the kubernetes directory (git repository).
with kubernetes_dir:
# Create a command to get the current branch.
git_branch = 'git branch | grep "\*" | cut -d" " -f2'
current_branch = subprocess.check_output(git_branch, shell=True).strip()
print ("Current branch: ", current_branch)
# Create the path to a file to indicate if the build was broken.
broken_build = charm_dir / ".broken_build"
# write out the .broken_build file while this block is executing.
with check_sentinel(broken_build) as last_build_failed:
print ("Last build failed: ", last_build_failed)
# Rebuild if current version is different or last build failed.
if current_branch != version or last_build_failed:
installer.build(branch)
if not output_path.isdir():
broken_build.touch()
# Create the symoblic links to the right directories.
installer.install()
relation_changed()
hookenv.log("The config-changed hook completed successfully.")
def config_changed():
"""
On the execution of the juju event 'config-changed' this function
determines the appropriate architecture and the configured version to
create kubernetes binary files.
"""
hookenv.log('Starting config-changed')
charm_dir = Path(hookenv.charm_dir())
config = hookenv.config()
# Get the version of kubernetes to install.
version = config['version']
username = config['username']
password = config['password']
certificate = config['apiserver-cert']
key = config['apiserver-key']
if version == 'master':
# The 'master' branch of kuberentes is used when master is configured.
branch = 'master'
elif version == 'local':
# Check for kubernetes binaries in the local files/output directory.
branch = None
else:
# Create a branch to a tag to get the release version.
branch = 'tags/{0}'.format(version)
cert_file = '/srv/kubernetes/apiserver.crt'
key_file = '/srv/kubernetes/apiserver.key'
# When the cert or key changes we need to restart the apiserver.
if config.changed('apiserver-cert') or config.changed('apiserver-key'):
hookenv.log('Certificate or key has changed.')
if not certificate or not key:
generate_cert(key=key_file, cert=cert_file)
else:
hookenv.log('Writing new certificate and key to server.')
with open(key_file, 'w') as file:
file.write(key)
with open(cert_file, 'w') as file:
file.write(certificate)
# Restart apiserver as the certificate or key has changed.
if host.service_running('apiserver'):
host.service_restart('apiserver')
# Reload nginx because it proxies https to apiserver.
if host.service_running('nginx'):
host.service_reload('nginx')
if config.changed('username') or config.changed('password'):
hookenv.log('Username or password changed, creating authentication.')
basic_auth(username, username, password)
if host.service_running('apiserver'):
host.service_restart('apiserver')
# Get package architecture, rather than arch from the kernel (uname -m).
arch = subprocess.check_output(['dpkg', '--print-architecture']).strip()
if not branch:
output_path = charm_dir / 'files/output'
kube_installer = KubernetesInstaller(arch, version, output_path)
else:
# Build the kuberentes binaries from source on the units.
kubernetes_dir = Path('/opt/kubernetes')
# Construct the path to the binaries using the arch.
output_path = kubernetes_dir / '_output/local/bin/linux' / arch
kube_installer = KubernetesInstaller(arch, version, output_path)
if not kubernetes_dir.exists():
message = 'The kubernetes source directory {0} does not exist. ' \
'Was the kubernetes repository cloned during the install?'
print(message.format(kubernetes_dir))
exit(1)
# Change to the kubernetes directory (git repository).
with kubernetes_dir:
# Create a command to get the current branch.
git_branch = 'git branch | grep "\*" | cut -d" " -f2'
current_branch = subprocess.check_output(git_branch, shell=True)
current_branch = current_branch.strip()
print('Current branch: ', current_branch)
# Create the path to a file to indicate if the build was broken.
broken_build = charm_dir / '.broken_build'
# write out the .broken_build file while this block is executing.
with check_sentinel(broken_build) as last_build_failed:
print('Last build failed: ', last_build_failed)
# Rebuild if current version is different or last build failed.
if current_branch != version or last_build_failed:
kube_installer.build(branch)
if not output_path.isdir():
broken_build.touch()
# Create the symoblic links to the right directories.
kube_installer.install()
relation_changed()
hookenv.log('The config-changed hook completed successfully.')