Contrail charms

Change-Id: I2d259d03f63fce38348b8384e26ac23e3fce44a8
Signed-off-by: Stuart Mackie <wsmackie@juniper.net>

1 files changed, 185 insertions, 0 deletions

diff --git a/contrail-analytics/hooks/docker_utils.py b/contrail-analytics/hooks/docker_utils.py
new file mode 100644
index 0000000..92605f0
--- /dev/null
+++ b/contrail-analytics/hooks/docker_utils.py
@@ -0,0 +1,185 @@
+import functools
+from time import sleep, time
+
+from subprocess import (
+    CalledProcessError,
+    check_call,
+    check_output
+)
+from charmhelpers.core.hookenv import (
+    resource_get,
+    config,
+    log,
+    ERROR,
+)
+
+
+config = config()
+
+
+DOCKER_PACKAGES = ["docker.engine"]
+DOCKER_CLI = "/usr/bin/docker"
+
+
+def retry(f=None, timeout=10, delay=2):
+    """Retry decorator.
+
+    Provides a decorator that can be used to retry a function if it raises
+    an exception.
+
+    :param timeout: timeout in seconds (default 10)
+    :param delay: retry delay in seconds (default 2)
+
+    Examples::
+
+        # retry fetch_url function
+        @retry
+        def fetch_url():
+            # fetch url
+
+        # retry fetch_url function for 60 secs
+        @retry(timeout=60)
+        def fetch_url():
+            # fetch url
+    """
+    if not f:
+        return functools.partial(retry, timeout=timeout, delay=delay)
+
+    @functools.wraps(f)
+    def func(*args, **kwargs):
+        start = time()
+        error = None
+        while True:
+            try:
+                return f(*args, **kwargs)
+            except Exception as e:
+                error = e
+            elapsed = time() - start
+            if elapsed >= timeout:
+                raise error
+            remaining = timeout - elapsed
+            sleep(delay if delay <= remaining else remaining)
+    return func
+
+
+# NOTE: this code assumes that name of container is the part of the
+# name of docker image
+
+def add_docker_repo():
+    import platform
+    cmd = 'curl -fsSL https://apt.dockerproject.org/gpg | sudo apt-key add -'
+    check_output(cmd, shell=True)
+    dist = platform.linux_distribution()[2].strip()
+    cmd = "add-apt-repository " + \
+          "\"deb https://apt.dockerproject.org/repo/ " + \
+          "ubuntu-%s " % (dist) + \
+          "main\""
+    check_output(cmd, shell=True)
+
+
+def is_container_launched(name):
+    # NOTE: 'paused' state is not getting into account if someone paused it
+    # NOTE: assume that this cmd is the same as inspect of state:
+    # [DOCKER_CLI, "inspect", "-f", "{{.State.Running}}", name]
+    cmd = DOCKER_CLI + ' ps | grep -w ' + name
+    try:
+        check_output(cmd, shell=True)
+        return True
+    except CalledProcessError:
+        return False
+
+
+def is_container_present(name):
+    cmd = DOCKER_CLI + ' ps --all | grep -w ' + name
+    try:
+        check_output(cmd, shell=True)
+        return True
+    except CalledProcessError:
+        return False
+
+
+def dpkg_version(name, pkg):
+    try:
+        return check_output([DOCKER_CLI,
+                             "exec",
+                             name,
+                             "dpkg-query",
+                             "-f", "${Version}\\n", "-W", pkg]).rstrip()
+    except CalledProcessError:
+        return None
+
+
+def load_docker_image(name):
+    img_path = resource_get(name)
+    if not img_path:
+        return None
+    image_id = get_docker_image_id(name)
+    if image_id:
+        # remove previous image
+        check_call([DOCKER_CLI, "rmi", image_id])
+    check_call([DOCKER_CLI, "load", "-i", img_path])
+    return get_docker_image_id(name)
+
+
+def get_docker_image_id(name):
+    try:
+        output = check_output(DOCKER_CLI + ' images | grep -w ' + name,
+                              shell=True)
+    except CalledProcessError:
+        return None
+    output = output.decode('UTF-8').split('\n')
+    for line in output:
+        parts = line.split()
+        if name in parts[0]:
+            return parts[2].strip()
+    return None
+
+
+def launch_docker_image(name, additional_args=[]):
+    image_id = get_docker_image_id(name)
+    if not image_id:
+        log(name + " docker image is not available", level=ERROR)
+        return
+
+    orchestrator = config.get("cloud_orchestrator")
+    args = [DOCKER_CLI,
+            "run",
+            "--net=host",
+            "--cap-add=AUDIT_WRITE",
+            "--privileged",
+            "--restart=unless-stopped",
+            "--env='CLOUD_ORCHESTRATOR=%s'" % (orchestrator),
+            "--volume=/etc/contrailctl:/etc/contrailctl",
+            "--name=%s" % name]
+    args.extend(additional_args)
+    args.extend(["-itd", image_id])
+    log("Run container with cmd: " + ' '.join(args))
+    check_call(args)
+
+
+def docker_cp(name, src, dst):
+    check_call([DOCKER_CLI, "cp", name + ":" + src, dst])
+
+
+def docker_exec(name, cmd):
+    cli = [DOCKER_CLI, "exec", name]
+    if isinstance(cmd, list):
+        cli.extend(cmd)
+    else:
+        cli.append(cmd)
+    output = check_output(cli)
+    return output.decode('UTF-8')
+
+
+@retry(timeout=32, delay=10)
+def apply_config_in_container(name, cfg_name):
+    try:
+        cmd = (DOCKER_CLI + ' exec ' + name + ' contrailctl config sync -v'
+               + ' -c ' + cfg_name)
+        check_call(cmd, shell=True)
+        return True
+    except CalledProcessError as e:
+        if e.returncode == 137:
+            log("Container was restarted. " + str(e.output), level=ERROR)
+            return False
+        raise