def container_remove(container_id):
"""
Remove a container (on this host) from Calico networking.
The container may be left in a state without any working networking.
If there is a network adaptor in the host namespace used by the container
then it is removed.
:param container_id: The namespace path or the ID of the container.
"""
# The netns manipulations must be done as root.
enforce_root()
# Resolve the name to ID.
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
workload_id = get_workload_id(container_id)
orchestrator_id = DOCKER_ORCHESTRATOR_ID
# Find the endpoint ID. We need this to find any ACL rules
try:
endpoint = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
print "Container %s doesn't contain any endpoints" % container_id
sys.exit(1)
# Remove any IP address assignments that this endpoint has
for net in endpoint.ipv4_nets | endpoint.ipv6_nets:
assert(net.size == 1)
ip = net.ip
pools = client.get_ip_pools(ip.version)
for pool in pools:
if ip in pool:
# Ignore failure to unassign address, since we're not
# enforcing assignments strictly in datastore.py.
client.unassign_address(pool, ip)
try:
# Remove the interface if it exists
netns.remove_veth(endpoint.name)
except CalledProcessError:
print "Could not remove Calico interface %s" % endpoint.name
sys.exit(1)
# Remove the container from the datastore.
client.remove_workload(hostname, orchestrator_id, workload_id)
print "Removed Calico interface from %s" % container_id
def container_remove(container_id):
"""
Remove a container (on this host) from Calico networking.
The container may be left in a state without any working networking.
If there is a network adaptor in the host namespace used by the container
then it is removed.
:param container_id: The namespace path or the ID of the container.
"""
# The netns manipulations must be done as root.
enforce_root()
# Resolve the name to ID.
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
endpoints = client.get_endpoints(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=escape_etcd(container_id))
else:
# We know we're using "docker" as the orchestrator. If we have a direct
# hit on the container id then we can proceed. Otherwise, ask docker to
# try converting the name/id fragment into a full ID.
orchestrator_id = DOCKER_ORCHESTRATOR_ID
endpoints = client.get_endpoints(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=container_id)
if not endpoints:
container_id = get_workload_id(container_id)
endpoints = client.get_endpoints(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=container_id)
for endpoint in endpoints:
# Remove any IP address assignments that this endpoint has
client.release_ips(set(map(IPAddress,
endpoint.ipv4_nets | endpoint.ipv6_nets)))
try:
# Remove the interface if it exists
netns.remove_veth(endpoint.name)
except CalledProcessError:
print "Could not remove Calico interface %s" % endpoint.name
# Always try to remove the workload, even if we didn't find any
# endpoints.
try:
client.remove_workload(hostname, orchestrator_id, container_id)
print "Removed Calico from %s" % container_id
except KeyError:
print "Failed find Calico data for %s" % container_id
def container_remove(container_id):
"""
Remove a container (on this host) from Calico networking.
The container may be left in a state without any working networking.
If there is a network adaptor in the host namespace used by the container
then it is removed.
:param container_id: The namespace path or the ID of the container.
"""
# The netns manipulations must be done as root.
enforce_root()
# Resolve the name to ID.
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
endpoints = client.get_endpoints(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=escape_etcd(container_id))
else:
# We know we're using "docker" as the orchestrator. If we have a direct
# hit on the container id then we can proceed. Otherwise, ask docker to
# try converting the name/id fragment into a full ID.
orchestrator_id = DOCKER_ORCHESTRATOR_ID
endpoints = client.get_endpoints(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=container_id)
if not endpoints:
container_id = get_workload_id(container_id)
endpoints = client.get_endpoints(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=container_id)
for endpoint in endpoints:
# Remove any IP address assignments that this endpoint has
client.release_ips(
set(map(IPAddress, endpoint.ipv4_nets | endpoint.ipv6_nets)))
try:
# Remove the interface if it exists
netns.remove_veth(endpoint.name)
except CalledProcessError:
print "Could not remove Calico interface %s" % endpoint.name
# Always try to remove the workload, even if we didn't find any
# endpoints.
try:
client.remove_workload(hostname, orchestrator_id, container_id)
print "Removed Calico from %s" % container_id
except KeyError:
print "Failed find Calico data for %s" % container_id
def container_remove(container_id):
"""
Remove a container (on this host) from Calico networking.
The container may be left in a state without any working networking.
If there is a network adaptor in the host namespace used by the container
then it is removed.
:param container_id: The namespace path or the ID of the container.
"""
# The netns manipulations must be done as root.
enforce_root()
# Resolve the name to ID.
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
workload_id = get_workload_id(container_id)
orchestrator_id = DOCKER_ORCHESTRATOR_ID
# Find the endpoint ID. We need this to find any ACL rules
try:
endpoint = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
print "Container %s doesn't contain any endpoints" % container_id
sys.exit(1)
# Remove any IP address assignments that this endpoint has
for net in endpoint.ipv4_nets | endpoint.ipv6_nets:
assert (net.size == 1)
ip = net.ip
pools = client.get_ip_pools(ip.version)
for pool in pools:
if ip in pool:
# Ignore failure to unassign address, since we're not
# enforcing assignments strictly in datastore.py.
client.unassign_address(pool, ip)
try:
# Remove the interface if it exists
netns.remove_veth(endpoint.name)
except CalledProcessError:
print "Could not remove Calico interface %s" % endpoint.name
sys.exit(1)
# Remove the container from the datastore.
client.remove_workload(hostname, orchestrator_id, workload_id)
print "Removed Calico interface from %s" % container_id
def get_workload_id(container_id):
"""
Get the a workload ID from either a namespace path or a partial Docker
ID or Docker name.
:param container_id: The namespace or Docker ID/Name.
:return: The workload ID as a string.
"""
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
return workload_id
def get_workload_id(container_id):
"""
Get the a workload ID from either a namespace path or a partial Docker
ID or Docker name.
:param container_id: The namespace or Docker ID/Name.
:return: The workload ID as a string.
"""
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
return workload_id
def lookup_workload(container_id):
"""
Lookup the workload_id and choose the correct orchestrator ID.
:param container_id: The container ID
:return: and tuple of orchestrator and workload_id
"""
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
return orchestrator_id, workload_id
def lookup_workload(container_id):
"""
Lookup the workload_id and choose the correct orchestrator ID.
:param container_id: The container ID
:return: and tuple of orchestrator and workload_id
"""
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
return orchestrator_id, workload_id
def container_ip_remove(container_id, ip, interface):
"""
Add an IP address to an existing Calico networked container.
:param container_id: The namespace path or container_id of the container.
:param ip: The IP to add
:param interface: The name of the interface in the container.
:return: None
"""
address = IPAddress(ip)
# The netns manipulations must be done as root.
enforce_root()
pool = get_pool_or_exit(address)
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
namespace = netns.Namespace(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
namespace = netns.PidNamespace(info["State"]["Pid"])
orchestrator_id = DOCKER_ORCHESTRATOR_ID
# Check the container is actually running.
if not info["State"]["Running"]:
print "%s is not currently running." % container_id
sys.exit(1)
# Check that the container is already networked
try:
endpoint = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
if address.version == 4:
nets = endpoint.ipv4_nets
else:
nets = endpoint.ipv6_nets
if not IPNetwork(address) in nets:
print "IP address is not assigned to container. Aborting."
sys.exit(1)
except KeyError:
print "Container is unknown to Calico."
sys.exit(1)
try:
nets.remove(IPNetwork(address))
client.update_endpoint(endpoint)
except (KeyError, ValueError):
print "Error updating datastore. Aborting."
sys.exit(1)
try:
netns.remove_ip_from_ns_veth(namespace, address, interface)
except CalledProcessError:
print "Error updating networking in container. Aborting."
sys.exit(1)
client.unassign_address(pool, address)
print "IP %s removed from %s" % (ip, container_id)
def container_ip_remove(container_id, ip, interface):
"""
Add an IP address to an existing Calico networked container.
:param container_id: The namespace path or container_id of the container.
:param ip: The IP to add
:param interface: The name of the interface in the container.
:return: None
"""
address = IPAddress(ip)
# The netns manipulations must be done as root.
enforce_root()
pool = get_pool_or_exit(address)
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
namespace = netns.Namespace(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
namespace = netns.PidNamespace(info["State"]["Pid"])
orchestrator_id = DOCKER_ORCHESTRATOR_ID
# Check the container is actually running.
if not info["State"]["Running"]:
print "%s is not currently running." % container_id
sys.exit(1)
# Check that the container is already networked
try:
endpoint = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
if address.version == 4:
nets = endpoint.ipv4_nets
else:
nets = endpoint.ipv6_nets
if not IPNetwork(address) in nets:
print "IP address is not assigned to container. Aborting."
sys.exit(1)
except KeyError:
print "Container is unknown to Calico."
sys.exit(1)
try:
nets.remove(IPNetwork(address))
client.update_endpoint(endpoint)
except (KeyError, ValueError):
print "Error updating datastore. Aborting."
sys.exit(1)
try:
netns.remove_ip_from_ns_veth(namespace, address, interface)
except CalledProcessError:
print "Error updating networking in container. Aborting."
sys.exit(1)
client.release_ips({address})
print "IP %s removed from %s" % (ip, container_id)
def container_ip_add(container_id, ip, interface):
"""
Add an IP address to an existing Calico networked container.
:param container_id: The namespace path or container_id of the container.
:param ip: The IP to add
:param interface: The name of the interface in the container.
:return: None
"""
# The netns manipulations must be done as root.
enforce_root()
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
namespace = netns.Namespace(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
namespace = netns.PidNamespace(info["State"]["Pid"])
orchestrator_id = DOCKER_ORCHESTRATOR_ID
# Check the container is actually running.
if not info["State"]["Running"]:
print "%s is not currently running." % container_id
sys.exit(1)
# Check that the container is already networked
try:
endpoint = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
print "Failed to add IP address to container.\n"
print_container_not_in_calico_msg(container_id)
sys.exit(1)
# From here, this method starts having side effects. If something
# fails then at least try to leave the system in a clean state.
address, pool = get_ip_and_pool(ip)
try:
if address.version == 4:
endpoint.ipv4_nets.add(IPNetwork(address))
else:
endpoint.ipv6_nets.add(IPNetwork(address))
client.update_endpoint(endpoint)
except (KeyError, ValueError):
client.release_ips({address})
print "Error updating datastore. Aborting."
sys.exit(1)
if not netns.ns_veth_exists(namespace, interface):
print "Interface provided does not exist in container. Aborting."
sys.exit(1)
try:
netns.add_ip_to_ns_veth(namespace, address, interface)
except CalledProcessError:
print "Error updating networking in container. Aborting."
if address.version == 4:
endpoint.ipv4_nets.remove(IPNetwork(address))
else:
endpoint.ipv6_nets.remove(IPNetwork(address))
client.update_endpoint(endpoint)
client.release_ips({address})
sys.exit(1)
print "IP %s added to %s" % (str(address), container_id)
def container_add(container_id, ip, interface):
"""
Add a container (on this host) to Calico networking with the given IP.
:param container_id: The namespace path or the docker name/ID of the container.
:param ip: An IPAddress object with the desired IP to assign.
:param interface: The name of the interface in the container.
"""
# The netns manipulations must be done as root.
enforce_root()
# TODO: This section is redundant in container_add_ip and elsewhere
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
namespace = netns.Namespace(container_id)
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
namespace = netns.PidNamespace(info["State"]["Pid"])
# Check the container is actually running.
if not info["State"]["Running"]:
print_paragraph("%s is not currently running." % container_id)
sys.exit(1)
# We can't set up Calico if the container shares the host namespace.
if info["HostConfig"]["NetworkMode"] == "host":
print_paragraph("Can't add %s to Calico because it is "
"running NetworkMode = host." % container_id)
sys.exit(1)
# Check if the container already exists
try:
_ = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
# Calico doesn't know about this container. Continue.
pass
else:
# Calico already set up networking for this container. Since we got
# called with an IP address, we shouldn't just silently exit, since
# that would confuse the user: the container would not be reachable on
# that IP address.
print_paragraph("%s has already been configured with Calico "
"Networking." % container_id)
sys.exit(1)
ep = Endpoint(hostname=hostname,
orchestrator_id=DOCKER_ORCHESTRATOR_ID,
workload_id=workload_id,
endpoint_id=uuid.uuid1().hex,
state="active",
mac=None)
ip, _ = get_ip_and_pool(ip)
network = IPNetwork(ip)
if network.version == 4:
ep.ipv4_nets.add(network)
else:
ep.ipv6_nets.add(network)
# Create the veth, move into the container namespace, add the IP and
# set up the default routes.
netns.increment_metrics(namespace)
netns.create_veth(ep.name, ep.temp_interface_name)
netns.move_veth_into_ns(namespace, ep.temp_interface_name, interface)
netns.add_ip_to_ns_veth(namespace, ip, interface)
netns.add_ns_default_route(namespace, ep.name, interface)
# Grab the MAC assigned to the veth in the namespace.
ep.mac = netns.get_ns_veth_mac(namespace, interface)
# Register the endpoint with Felix.
client.set_endpoint(ep)
# Let the caller know what endpoint was created.
print_paragraph("IP %s added to %s" % (str(ip), container_id))
return ep
def container_add(container_id, ip, interface):
"""
Add a container (on this host) to Calico networking with the given IP.
:param container_id: The namespace path or the docker name/ID of the container.
:param ip: An IPAddress object with the desired IP to assign.
:param interface: The name of the interface in the container.
"""
# The netns manipulations must be done as root.
enforce_root()
# TODO: This section is redundant in container_add_ip and elsewhere
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
namespace = netns.Namespace(container_id)
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
namespace = netns.PidNamespace(info["State"]["Pid"])
# Check the container is actually running.
if not info["State"]["Running"]:
print_paragraph("%s is not currently running." % container_id)
sys.exit(1)
# We can't set up Calico if the container shares the host namespace.
if info["HostConfig"]["NetworkMode"] == "host":
print_paragraph("Can't add %s to Calico because it is "
"running NetworkMode = host." % container_id)
sys.exit(1)
# Check if the container already exists
try:
_ = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
# Calico doesn't know about this container. Continue.
pass
else:
# Calico already set up networking for this container. Since we got
# called with an IP address, we shouldn't just silently exit, since
# that would confuse the user: the container would not be reachable on
# that IP address.
print_paragraph("%s has already been configured with Calico "
"Networking." % container_id)
sys.exit(1)
ip, pool = get_ip_and_pool(ip)
try:
# The next hop IPs for this host are stored in etcd.
next_hops = client.get_default_next_hops(hostname)
next_hops[ip.version]
except KeyError:
print_paragraph("This node is not configured for IPv%d. "
"Is calico-node running?" % ip.version)
unallocated_ips = client.release_ips({ip})
if unallocated_ips:
print_paragraph("Error during cleanup. %s was already"
"unallocated." % ip)
sys.exit(1)
# Get the next hop for the IP address.
next_hop = next_hops[ip.version]
network = IPNetwork(IPAddress(ip))
ep = Endpoint(hostname=hostname,
orchestrator_id=DOCKER_ORCHESTRATOR_ID,
workload_id=workload_id,
endpoint_id=uuid.uuid1().hex,
state="active",
mac=None)
if network.version == 4:
ep.ipv4_nets.add(network)
ep.ipv4_gateway = next_hop
else:
ep.ipv6_nets.add(network)
ep.ipv6_gateway = next_hop
# Create the veth, move into the container namespace, add the IP and
# set up the default routes.
netns.increment_metrics(namespace)
netns.create_veth(ep.name, ep.temp_interface_name)
netns.move_veth_into_ns(namespace, ep.temp_interface_name, interface)
netns.add_ip_to_ns_veth(namespace, ip, interface)
netns.add_ns_default_route(namespace, next_hop, interface)
# Grab the MAC assigned to the veth in the namespace.
ep.mac = netns.get_ns_veth_mac(namespace, interface)
# Register the endpoint with Felix.
client.set_endpoint(ep)
# Let the caller know what endpoint was created.
print_paragraph("IP %s added to %s" % (str(ip), container_id))
return ep
def container(arguments):
"""
Main dispatcher for container commands. Calls the corresponding helper
function.
:param arguments: A dictionary of arguments already processed through
this file's docstring with docopt
:return: None
"""
validate_arguments(arguments)
try:
workload_id = None
if "<CONTAINER>" in arguments:
container_id = arguments.get("<CONTAINER>")
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
if arguments.get("ip"):
if arguments.get("add"):
container_ip_add(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
elif arguments.get("remove"):
container_ip_remove(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
else:
if arguments.get("add"):
container_add(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
if arguments.get("remove"):
container_remove(arguments.get("<CONTAINER>"))
elif arguments.get("endpoint"):
endpoint.endpoint_show(hostname,
orchestrator_id,
workload_id,
None,
True)
elif arguments.get("profile"):
if arguments.get("append"):
endpoint.endpoint_profile_append(hostname,
orchestrator_id,
workload_id,
None,
arguments['<PROFILES>'])
elif arguments.get("remove"):
endpoint.endpoint_profile_remove(hostname,
orchestrator_id,
workload_id,
None,
arguments['<PROFILES>'])
elif arguments.get("set"):
endpoint.endpoint_profile_set(hostname,
orchestrator_id,
workload_id,
None,
arguments['<PROFILES>'])
else:
if arguments.get("add"):
container_add(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
if arguments.get("remove"):
container_remove(arguments.get("<CONTAINER>"))
except ConnectionError as e:
# We hit a "Permission denied error (13) if the docker daemon
# does not have sudo permissions
if permission_denied_error(e):
print_paragraph("Unable to run command. Re-run the "
"command as root, or configure the docker "
"group to run with sudo privileges (see docker "
"installation guide for details).")
else:
print_paragraph("Unable to run docker commands. Is the docker "
"daemon running?")
sys.exit(1)
def container(arguments):
"""
Main dispatcher for container commands. Calls the corresponding helper
function.
:param arguments: A dictionary of arguments already processed through
this file's docstring with docopt
:return: None
"""
validate_arguments(arguments)
try:
workload_id = None
if "<CONTAINER>" in arguments:
container_id = arguments.get("<CONTAINER>")
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
if arguments.get("ip"):
if arguments.get("add"):
container_ip_add(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
elif arguments.get("remove"):
container_ip_remove(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
else:
if arguments.get("add"):
container_add(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
if arguments.get("remove"):
container_remove(arguments.get("<CONTAINER>"))
elif arguments.get("endpoint"):
endpoint.endpoint_show(hostname, orchestrator_id, workload_id,
None, True)
elif arguments.get("profile"):
if arguments.get("append"):
endpoint.endpoint_profile_append(hostname, orchestrator_id,
workload_id, None,
arguments['<PROFILES>'])
elif arguments.get("remove"):
endpoint.endpoint_profile_remove(hostname, orchestrator_id,
workload_id, None,
arguments['<PROFILES>'])
elif arguments.get("set"):
endpoint.endpoint_profile_set(hostname, orchestrator_id,
workload_id, None,
arguments['<PROFILES>'])
else:
if arguments.get("add"):
container_add(arguments.get("<CONTAINER>"),
arguments.get("<IP>"),
arguments.get("--interface"))
if arguments.get("remove"):
container_remove(arguments.get("<CONTAINER>"))
except ConnectionError as e:
# We hit a "Permission denied error (13) if the docker daemon
# does not have sudo permissions
if permission_denied_error(e):
print_paragraph("Unable to run command. Re-run the "
"command as root, or configure the docker "
"group to run with sudo privileges (see docker "
"installation guide for details).")
else:
print_paragraph("Unable to run docker commands. Is the docker "
"daemon running?")
sys.exit(1)
def container_ip_add(container_id, ip, interface):
"""
Add an IP address to an existing Calico networked container.
:param container_id: The namespace path or container_id of the container.
:param ip: The IP to add
:param interface: The name of the interface in the container.
:return: None
"""
address = IPAddress(ip)
# The netns manipulations must be done as root.
enforce_root()
pool = get_pool_or_exit(address)
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
namespace = netns.Namespace(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
namespace = netns.PidNamespace(info["State"]["Pid"])
orchestrator_id = DOCKER_ORCHESTRATOR_ID
# Check the container is actually running.
if not info["State"]["Running"]:
print "%s is not currently running." % container_id
sys.exit(1)
# Check that the container is already networked
try:
endpoint = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
print "Failed to add IP address to container.\n"
print_container_not_in_calico_msg(container_id)
sys.exit(1)
# From here, this method starts having side effects. If something
# fails then at least try to leave the system in a clean state.
if not client.assign_address(pool, address):
print "IP address is already assigned in pool %s " % pool
sys.exit(1)
try:
if address.version == 4:
endpoint.ipv4_nets.add(IPNetwork(address))
else:
endpoint.ipv6_nets.add(IPNetwork(address))
client.update_endpoint(endpoint)
except (KeyError, ValueError):
client.unassign_address(pool, ip)
print "Error updating datastore. Aborting."
sys.exit(1)
try:
netns.add_ip_to_ns_veth(namespace, address, interface)
except CalledProcessError:
print "Error updating networking in container. Aborting."
if address.version == 4:
endpoint.ipv4_nets.remove(IPNetwork(address))
else:
endpoint.ipv6_nets.remove(IPNetwork(address))
client.update_endpoint(endpoint)
client.unassign_address(pool, ip)
sys.exit(1)
print "IP %s added to %s" % (ip, container_id)
def container_add(container_id, ip, interface):
"""
Add a container (on this host) to Calico networking with the given IP.
:param container_id: The namespace path or the docker name/ID of the container.
:param ip: An IPAddress object with the desired IP to assign.
:param interface: The name of the interface in the container.
"""
# The netns manipulations must be done as root.
enforce_root()
if container_id.startswith("/") and os.path.exists(container_id):
# The ID is a path. Don't do any docker lookups
workload_id = escape_etcd(container_id)
orchestrator_id = NAMESPACE_ORCHESTRATOR_ID
namespace = netns.Namespace(container_id)
else:
info = get_container_info_or_exit(container_id)
workload_id = info["Id"]
orchestrator_id = DOCKER_ORCHESTRATOR_ID
namespace = netns.PidNamespace(info["State"]["Pid"])
# Check the container is actually running.
if not info["State"]["Running"]:
print "%s is not currently running." % container_id
sys.exit(1)
# We can't set up Calico if the container shares the host namespace.
if info["HostConfig"]["NetworkMode"] == "host":
print "Can't add %s to Calico because it is " \
"running NetworkMode = host." % container_id
sys.exit(1)
# Check if the container already exists
try:
_ = client.get_endpoint(hostname=hostname,
orchestrator_id=orchestrator_id,
workload_id=workload_id)
except KeyError:
# Calico doesn't know about this container. Continue.
pass
else:
# Calico already set up networking for this container. Since we got
# called with an IP address, we shouldn't just silently exit, since
# that would confuse the user: the container would not be reachable on
# that IP address.
print "%s has already been configured with Calico Networking." % \
container_id
sys.exit(1)
# Check the IP is in the allocation pool. If it isn't, BIRD won't export
# it.
ip = IPAddress(ip)
pool = get_pool_or_exit(ip)
# The next hop IPs for this host are stored in etcd.
next_hops = client.get_default_next_hops(hostname)
try:
next_hops[ip.version]
except KeyError:
print "This node is not configured for IPv%d." % ip.version
sys.exit(1)
# Assign the IP
if not client.assign_address(pool, ip):
print "IP address is already assigned in pool %s " % pool
sys.exit(1)
# Get the next hop for the IP address.
next_hop = next_hops[ip.version]
network = IPNetwork(IPAddress(ip))
ep = Endpoint(hostname=hostname,
orchestrator_id=DOCKER_ORCHESTRATOR_ID,
workload_id=workload_id,
endpoint_id=uuid.uuid1().hex,
state="active",
mac=None)
if network.version == 4:
ep.ipv4_nets.add(network)
ep.ipv4_gateway = next_hop
else:
ep.ipv6_nets.add(network)
ep.ipv6_gateway = next_hop
# Create the veth, move into the container namespace, add the IP and
# set up the default routes.
netns.create_veth(ep.name, ep.temp_interface_name)
netns.move_veth_into_ns(namespace, ep.temp_interface_name, interface)
netns.add_ip_to_ns_veth(namespace, ip, interface)
netns.add_ns_default_route(namespace, next_hop, interface)
# Grab the MAC assigned to the veth in the namespace.
ep.mac = netns.get_ns_veth_mac(namespace, interface)
# Register the endpoint with Felix.
client.set_endpoint(ep)
# Let the caller know what endpoint was created.
return ep