/
mmkubernetes.c
2086 lines (1938 loc) · 76.2 KB
/
mmkubernetes.c
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/* mmkubernetes.c
* This is a message modification module. It uses metadata obtained
* from the message to query Kubernetes and obtain additional metadata
* relating to the container instance.
*
* Inspired by:
* https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter
*
* NOTE: read comments in module-template.h for details on the calling interface!
*
* Copyright 2016 Red Hat Inc.
*
* This file is part of rsyslog.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* -or-
* see COPYING.ASL20 in the source distribution
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* needed for asprintf */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include "config.h"
#include "rsyslog.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <sys/stat.h>
#include <libestr.h>
#include <liblognorm.h>
#include <json.h>
#include <curl/curl.h>
#include <curl/easy.h>
#include <pthread.h>
#include "conf.h"
#include "syslogd-types.h"
#include "module-template.h"
#include "errmsg.h"
#include "statsobj.h"
#include "regexp.h"
#include "hashtable.h"
#include "hashtable_itr.h"
#include "srUtils.h"
#include "unicode-helper.h"
#include "datetime.h"
/* static data */
MODULE_TYPE_OUTPUT /* this is technically an output plugin */
MODULE_TYPE_KEEP /* releasing the module would cause a leak through libcurl */
MODULE_CNFNAME("mmkubernetes")
DEF_OMOD_STATIC_DATA
DEFobjCurrIf(regexp)
DEFobjCurrIf(statsobj)
DEFobjCurrIf(datetime)
#define HAVE_LOADSAMPLESFROMSTRING 1
#if defined(NO_LOADSAMPLESFROMSTRING)
#undef HAVE_LOADSAMPLESFROMSTRING
#endif
/* original from fluentd plugin:
* 'var\.log\.containers\.(?<pod_name>[a-z0-9]([-a-z0-9]*[a-z0-9])?\
* (\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*)_(?<namespace>[^_]+)_\
* (?<container_name>.+)-(?<docker_id>[a-z0-9]{64})\.log$'
* this is for _tag_ match, not actual filename match - in_tail turns filename
* into a fluentd tag
*/
#define DFLT_FILENAME_LNRULES "rule=:/var/log/containers/%pod_name:char-to:_%_"\
"%namespace_name:char-to:_%_%container_name_and_id:char-to:.%.log"
#define DFLT_FILENAME_RULEBASE "/etc/rsyslog.d/k8s_filename.rulebase"
/* original from fluentd plugin:
* '^(?<name_prefix>[^_]+)_(?<container_name>[^\._]+)\
* (\.(?<container_hash>[^_]+))?_(?<pod_name>[^_]+)_\
* (?<namespace>[^_]+)_[^_]+_[^_]+$'
*/
#define DFLT_CONTAINER_LNRULES "rule=:%k8s_prefix:char-to:_%_%container_name:char-to:.%."\
"%container_hash:char-to:_%_"\
"%pod_name:char-to:_%_%namespace_name:char-to:_%_%not_used_1:char-to:_%_%not_used_2:rest%\n"\
"rule=:%k8s_prefix:char-to:_%_%container_name:char-to:_%_"\
"%pod_name:char-to:_%_%namespace_name:char-to:_%_%not_used_1:char-to:_%_%not_used_2:rest%"
#define DFLT_CONTAINER_RULEBASE "/etc/rsyslog.d/k8s_container_name.rulebase"
#define DFLT_SRCMD_PATH "$!metadata!filename"
#define DFLT_DSTMD_PATH "$!"
#define DFLT_DE_DOT 1 /* true */
#define DFLT_DE_DOT_SEPARATOR "_"
#define DFLT_CONTAINER_NAME "$!CONTAINER_NAME" /* name of variable holding CONTAINER_NAME value */
#define DFLT_CONTAINER_ID_FULL "$!CONTAINER_ID_FULL" /* name of variable holding CONTAINER_ID_FULL value */
#define DFLT_KUBERNETES_URL "https://kubernetes.default.svc.cluster.local:443"
#define DFLT_BUSY_RETRY_INTERVAL 5 /* retry every 5 seconds */
#define DFLT_SSL_PARTIAL_CHAIN 0 /* disallow X509_V_FLAG_PARTIAL_CHAIN by default */
#define DFLT_CACHE_ENTRY_TTL 3600 /* delete entries from the cache older than 3600 seconds */
#define DFLT_CACHE_EXPIRE_INTERVAL -1 /* delete all expired entries from the cache every N seconds
-1 disables cache expiration/ttl checking
0 means - run cache expiration for every record */
/* only support setting the partial chain flag on openssl platforms that have the define */
#if defined(ENABLE_OPENSSL) && defined(X509_V_FLAG_PARTIAL_CHAIN)
#define SUPPORT_SSL_PARTIAL_CHAIN 1
#endif
struct cache_entry_s {
time_t ttl; /* when this entry should expire */
void *data; /* the user data */
};
static struct cache_s {
const uchar *kbUrl;
struct hashtable *mdHt;
struct hashtable *nsHt;
pthread_mutex_t *cacheMtx;
time_t lastBusyTime; /* when we got the last busy response from kubernetes */
time_t expirationTime; /* if cache expiration checking is enable, time to check for expiration */
} **caches;
typedef struct {
int nmemb;
uchar **patterns;
regex_t *regexps;
} annotation_match_t;
/* module configuration data */
struct modConfData_s {
rsconf_t *pConf; /* our overall config object */
uchar *kubernetesUrl; /* scheme, host, port, and optional path prefix for Kubernetes API lookups */
uchar *srcMetadataPath; /* where to get data for kubernetes queries */
uchar *dstMetadataPath; /* where to put metadata obtained from kubernetes */
uchar *caCertFile; /* File holding the CA cert (+optional chain) of CA that issued the Kubernetes server cert */
uchar *myCertFile; /* File holding cert corresponding to private key used for client cert auth */
uchar *myPrivKeyFile; /* File holding private key corresponding to cert used for client cert auth */
sbool allowUnsignedCerts; /* For testing/debugging - do not check for CA certs (CURLOPT_SSL_VERIFYPEER FALSE) */
sbool skipVerifyHost; /* For testing/debugging - skip cert hostname verify (CURLOPT_SSL_VERIFYHOST FALSE) */
uchar *token; /* The token value to use to authenticate to Kubernetes - takes precedence over tokenFile */
uchar *tokenFile; /* The file whose contents is the token value to use to authenticate to Kubernetes */
sbool de_dot; /* If true (default), convert '.' characters in labels & annotations to de_dot_separator */
uchar *de_dot_separator; /* separator character (default '_') to use for de_dotting */
size_t de_dot_separator_len; /* length of separator character */
annotation_match_t annotation_match; /* annotation keys must match these to be included in record */
char *fnRules; /* lognorm rules for container log filename match */
uchar *fnRulebase; /* lognorm rulebase filename for container log filename match */
char *contRules; /* lognorm rules for CONTAINER_NAME value match */
uchar *contRulebase; /* lognorm rulebase filename for CONTAINER_NAME value match */
int busyRetryInterval; /* how to handle 429 response - 0 means error, non-zero means retry every N seconds */
sbool sslPartialChain; /* if true, allow using intermediate certs without root certs */
int cacheEntryTTL; /* delete entries from the cache if they are older than this many seconds */
int cacheExpireInterval; /* delete all expired entries from the cache every this many seconds */
};
/* action (instance) configuration data */
typedef struct _instanceData {
uchar *kubernetesUrl; /* scheme, host, port, and optional path prefix for Kubernetes API lookups */
msgPropDescr_t *srcMetadataDescr; /* where to get data for kubernetes queries */
uchar *dstMetadataPath; /* where to put metadata obtained from kubernetes */
uchar *caCertFile; /* File holding the CA cert (+optional chain) of CA that issued the Kubernetes server cert */
uchar *myCertFile; /* File holding cert corresponding to private key used for client cert auth */
uchar *myPrivKeyFile; /* File holding private key corresponding to cert used for client cert auth */
sbool allowUnsignedCerts; /* For testing/debugging - do not check for CA certs (CURLOPT_SSL_VERIFYPEER FALSE) */
sbool skipVerifyHost; /* For testing/debugging - skip cert hostname verify (CURLOPT_SSL_VERIFYHOST FALSE) */
uchar *token; /* The token value to use to authenticate to Kubernetes - takes precedence over tokenFile */
uchar *tokenFile; /* The file whose contents is the token value to use to authenticate to Kubernetes */
sbool de_dot; /* If true (default), convert '.' characters in labels & annotations to de_dot_separator */
uchar *de_dot_separator; /* separator character (default '_') to use for de_dotting */
size_t de_dot_separator_len; /* length of separator character */
annotation_match_t annotation_match; /* annotation keys must match these to be included in record */
char *fnRules; /* lognorm rules for container log filename match */
uchar *fnRulebase; /* lognorm rulebase filename for container log filename match */
ln_ctx fnCtxln; /**< context to be used for liblognorm */
char *contRules; /* lognorm rules for CONTAINER_NAME value match */
uchar *contRulebase; /* lognorm rulebase filename for CONTAINER_NAME value match */
ln_ctx contCtxln; /**< context to be used for liblognorm */
msgPropDescr_t *contNameDescr; /* CONTAINER_NAME field */
msgPropDescr_t *contIdFullDescr; /* CONTAINER_ID_FULL field */
struct cache_s *cache;
int busyRetryInterval; /* how to handle 429 response - 0 means error, non-zero means retry every N seconds */
sbool sslPartialChain; /* if true, allow using intermediate certs without root certs */
int cacheEntryTTL; /* delete entries from the cache if they are older than this many seconds */
int cacheExpireInterval; /* delete all expired entries from the cache every this many seconds */
} instanceData;
typedef struct wrkrInstanceData {
instanceData *pData;
CURL *curlCtx;
struct curl_slist *curlHdr;
char *curlRply;
size_t curlRplyLen;
statsobj_t *stats; /* stats for this instance */
STATSCOUNTER_DEF(k8sRecordSeen, mutK8sRecordSeen);
STATSCOUNTER_DEF(namespaceMetadataSuccess, mutNamespaceMetadataSuccess);
STATSCOUNTER_DEF(namespaceMetadataNotFound, mutNamespaceMetadataNotFound);
STATSCOUNTER_DEF(namespaceMetadataBusy, mutNamespaceMetadataBusy);
STATSCOUNTER_DEF(namespaceMetadataError, mutNamespaceMetadataError);
STATSCOUNTER_DEF(podMetadataSuccess, mutPodMetadataSuccess);
STATSCOUNTER_DEF(podMetadataNotFound, mutPodMetadataNotFound);
STATSCOUNTER_DEF(podMetadataBusy, mutPodMetadataBusy);
STATSCOUNTER_DEF(podMetadataError, mutPodMetadataError);
STATSCOUNTER_DEF(podCacheNumEntries, mutPodCacheNumEntries);
STATSCOUNTER_DEF(namespaceCacheNumEntries, mutNamespaceCacheNumEntries);
STATSCOUNTER_DEF(podCacheHits, mutPodCacheHits);
STATSCOUNTER_DEF(namespaceCacheHits, mutNamespaceCacheHits);
/* cache misses should correspond to metadata success, busy, etc. k8s api calls */
STATSCOUNTER_DEF(podCacheMisses, mutPodCacheMisses);
STATSCOUNTER_DEF(namespaceCacheMisses, mutNamespaceCacheMisses);
} wrkrInstanceData_t;
/* module parameters (v6 config format) */
static struct cnfparamdescr modpdescr[] = {
{ "kubernetesurl", eCmdHdlrString, 0 },
{ "srcmetadatapath", eCmdHdlrString, 0 },
{ "dstmetadatapath", eCmdHdlrString, 0 },
{ "tls.cacert", eCmdHdlrString, 0 },
{ "tls.mycert", eCmdHdlrString, 0 },
{ "tls.myprivkey", eCmdHdlrString, 0 },
{ "allowunsignedcerts", eCmdHdlrBinary, 0 },
{ "skipverifyhost", eCmdHdlrBinary, 0 },
{ "token", eCmdHdlrString, 0 },
{ "tokenfile", eCmdHdlrString, 0 },
{ "annotation_match", eCmdHdlrArray, 0 },
{ "de_dot", eCmdHdlrBinary, 0 },
{ "de_dot_separator", eCmdHdlrString, 0 },
{ "filenamerulebase", eCmdHdlrString, 0 },
{ "containerrulebase", eCmdHdlrString, 0 },
{ "busyretryinterval", eCmdHdlrInt, 0 },
{ "sslpartialchain", eCmdHdlrBinary, 0 },
{ "cacheentryttl", eCmdHdlrInt, 0 },
{ "cacheexpireinterval", eCmdHdlrInt, 0 }
#if HAVE_LOADSAMPLESFROMSTRING == 1
,
{ "filenamerules", eCmdHdlrArray, 0 },
{ "containerrules", eCmdHdlrArray, 0 }
#endif
};
static struct cnfparamblk modpblk = {
CNFPARAMBLK_VERSION,
sizeof(modpdescr)/sizeof(struct cnfparamdescr),
modpdescr
};
/* action (instance) parameters (v6 config format) */
static struct cnfparamdescr actpdescr[] = {
{ "kubernetesurl", eCmdHdlrString, 0 },
{ "srcmetadatapath", eCmdHdlrString, 0 },
{ "dstmetadatapath", eCmdHdlrString, 0 },
{ "tls.cacert", eCmdHdlrString, 0 },
{ "tls.mycert", eCmdHdlrString, 0 },
{ "tls.myprivkey", eCmdHdlrString, 0 },
{ "allowunsignedcerts", eCmdHdlrBinary, 0 },
{ "skipverifyhost", eCmdHdlrBinary, 0 },
{ "token", eCmdHdlrString, 0 },
{ "tokenfile", eCmdHdlrString, 0 },
{ "annotation_match", eCmdHdlrArray, 0 },
{ "de_dot", eCmdHdlrBinary, 0 },
{ "de_dot_separator", eCmdHdlrString, 0 },
{ "filenamerulebase", eCmdHdlrString, 0 },
{ "containerrulebase", eCmdHdlrString, 0 },
{ "busyretryinterval", eCmdHdlrInt, 0 },
{ "sslpartialchain", eCmdHdlrBinary, 0 },
{ "cacheentryttl", eCmdHdlrInt, 0 },
{ "cacheexpireinterval", eCmdHdlrInt, 0 }
#if HAVE_LOADSAMPLESFROMSTRING == 1
,
{ "filenamerules", eCmdHdlrArray, 0 },
{ "containerrules", eCmdHdlrArray, 0 }
#endif
};
static struct cnfparamblk actpblk =
{ CNFPARAMBLK_VERSION,
sizeof(actpdescr)/sizeof(struct cnfparamdescr),
actpdescr
};
static modConfData_t *loadModConf = NULL; /* modConf ptr to use for the current load process */
static modConfData_t *runModConf = NULL; /* modConf ptr to use for the current exec process */
static void free_annotationmatch(annotation_match_t *match) {
if (match) {
for(int ii = 0 ; ii < match->nmemb; ++ii) {
if (match->patterns)
free(match->patterns[ii]);
if (match->regexps)
regexp.regfree(&match->regexps[ii]);
}
free(match->patterns);
match->patterns = NULL;
free(match->regexps);
match->regexps = NULL;
match->nmemb = 0;
}
}
static int init_annotationmatch(annotation_match_t *match, struct cnfarray *ar) {
DEFiRet;
match->nmemb = ar->nmemb;
CHKmalloc(match->patterns = calloc(sizeof(uchar*), match->nmemb));
CHKmalloc(match->regexps = calloc(sizeof(regex_t), match->nmemb));
for(int jj = 0; jj < ar->nmemb; ++jj) {
int rexret = 0;
match->patterns[jj] = (uchar*)es_str2cstr(ar->arr[jj], NULL);
rexret = regexp.regcomp(&match->regexps[jj],
(char *)match->patterns[jj], REG_EXTENDED|REG_NOSUB);
if (0 != rexret) {
char errMsg[512];
regexp.regerror(rexret, &match->regexps[jj], errMsg, sizeof(errMsg));
iRet = RS_RET_CONFIG_ERROR;
LogError(0, iRet,
"error: could not compile annotation_match string [%s]"
" into an extended regexp - %d: %s\n",
match->patterns[jj], rexret, errMsg);
break;
}
}
finalize_it:
if (iRet)
free_annotationmatch(match);
RETiRet;
}
static int copy_annotationmatch(annotation_match_t *src, annotation_match_t *dest) {
DEFiRet;
dest->nmemb = src->nmemb;
CHKmalloc(dest->patterns = malloc(sizeof(uchar*) * dest->nmemb));
CHKmalloc(dest->regexps = calloc(sizeof(regex_t), dest->nmemb));
for(int jj = 0 ; jj < src->nmemb ; ++jj) {
CHKmalloc(dest->patterns[jj] = (uchar*)strdup((char *)src->patterns[jj]));
/* assumes was already successfully compiled */
regexp.regcomp(&dest->regexps[jj], (char *)dest->patterns[jj], REG_EXTENDED|REG_NOSUB);
}
finalize_it:
if (iRet)
free_annotationmatch(dest);
RETiRet;
}
/* takes a hash of annotations and returns another json object hash containing only the
* keys that match - this logic is taken directly from fluent-plugin-kubernetes_metadata_filter
* except that we do not add the key multiple times to the object to be returned
*/
static struct json_object *match_annotations(annotation_match_t *match,
struct json_object *annotations) {
struct json_object *ret = NULL;
for (int jj = 0; jj < match->nmemb; ++jj) {
struct json_object_iterator it = json_object_iter_begin(annotations);
struct json_object_iterator itEnd = json_object_iter_end(annotations);
for (;!json_object_iter_equal(&it, &itEnd); json_object_iter_next(&it)) {
const char *const key = json_object_iter_peek_name(&it);
if (!ret || !fjson_object_object_get_ex(ret, key, NULL)) {
if (!regexp.regexec(&match->regexps[jj], key, 0, NULL, 0)) {
if (!ret) {
ret = json_object_new_object();
}
json_object_object_add(ret, key,
json_object_get(json_object_iter_peek_value(&it)));
}
}
}
}
return ret;
}
/* This will take a hash of labels or annotations and will de_dot the keys.
* It will return a brand new hash. AFAICT, there is no safe way to
* iterate over the hash while modifying it in place.
*/
static struct json_object *de_dot_json_object(struct json_object *jobj,
const char *delim, size_t delim_len) {
struct json_object *ret = NULL;
struct json_object_iterator it = json_object_iter_begin(jobj);
struct json_object_iterator itEnd = json_object_iter_end(jobj);
es_str_t *new_es_key = NULL;
DEFiRet;
ret = json_object_new_object();
while (!json_object_iter_equal(&it, &itEnd)) {
const char *const key = json_object_iter_peek_name(&it);
const char *cc = strstr(key, ".");
if (NULL == cc) {
json_object_object_add(ret, key,
json_object_get(json_object_iter_peek_value(&it)));
} else {
char *new_key = NULL;
const char *prevcc = key;
new_es_key = es_newStrFromCStr(key, (es_size_t)(cc-prevcc));
while (cc) {
if (es_addBuf(&new_es_key, (char *)delim, (es_size_t)delim_len))
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
cc += 1; /* one past . */
prevcc = cc; /* beginning of next substring */
if ((cc = strstr(prevcc, ".")) || (cc = strchr(prevcc, '\0'))) {
if (es_addBuf(&new_es_key, (char *)prevcc, (es_size_t)(cc-prevcc)))
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
if (!*cc)
cc = NULL; /* EOS - done */
}
}
new_key = es_str2cstr(new_es_key, NULL);
es_deleteStr(new_es_key);
new_es_key = NULL;
json_object_object_add(ret, new_key,
json_object_get(json_object_iter_peek_value(&it)));
free(new_key);
}
json_object_iter_next(&it);
}
finalize_it:
if (iRet != RS_RET_OK) {
json_object_put(ret);
ret = NULL;
}
if (new_es_key)
es_deleteStr(new_es_key);
return ret;
}
/* given a "metadata" object field, do
* - make sure "annotations" field has only the matching keys
* - de_dot the "labels" and "annotations" fields keys
* This modifies the jMetadata object in place
*/
static void parse_labels_annotations(struct json_object *jMetadata,
annotation_match_t *match, sbool de_dot,
const char *delim, size_t delim_len) {
struct json_object *jo = NULL;
if (fjson_object_object_get_ex(jMetadata, "annotations", &jo)) {
if ((jo = match_annotations(match, jo)))
json_object_object_add(jMetadata, "annotations", jo);
else
json_object_object_del(jMetadata, "annotations");
}
/* dedot labels and annotations */
if (de_dot) {
struct json_object *jo2 = NULL;
if (fjson_object_object_get_ex(jMetadata, "annotations", &jo)) {
if ((jo2 = de_dot_json_object(jo, delim, delim_len))) {
json_object_object_add(jMetadata, "annotations", jo2);
}
}
if (fjson_object_object_get_ex(jMetadata, "labels", &jo)) {
if ((jo2 = de_dot_json_object(jo, delim, delim_len))) {
json_object_object_add(jMetadata, "labels", jo2);
}
}
}
}
#if HAVE_LOADSAMPLESFROMSTRING == 1
static int array_to_rules(struct cnfarray *ar, char **rules) {
DEFiRet;
es_str_t *tmpstr = NULL;
es_size_t size = 0;
if (rules == NULL)
FINALIZE;
*rules = NULL;
if (!ar->nmemb)
FINALIZE;
for (int jj = 0; jj < ar->nmemb; jj++)
size += es_strlen(ar->arr[jj]);
if (!size)
FINALIZE;
CHKmalloc(tmpstr = es_newStr(size));
CHKiRet((es_addStr(&tmpstr, ar->arr[0])));
CHKiRet((es_addBufConstcstr(&tmpstr, "\n")));
for(int jj=1; jj < ar->nmemb; ++jj) {
CHKiRet((es_addStr(&tmpstr, ar->arr[jj])));
CHKiRet((es_addBufConstcstr(&tmpstr, "\n")));
}
CHKiRet((es_addBufConstcstr(&tmpstr, "\0")));
CHKmalloc(*rules = es_str2cstr(tmpstr, NULL));
finalize_it:
if (tmpstr) {
es_deleteStr(tmpstr);
}
if (iRet != RS_RET_OK) {
free(*rules);
*rules = NULL;
}
RETiRet;
}
#endif
/* callback for liblognorm error messages */
static void
errCallBack(void __attribute__((unused)) *cookie, const char *msg,
size_t __attribute__((unused)) lenMsg)
{
LogError(0, RS_RET_ERR_LIBLOGNORM, "liblognorm error: %s", msg);
}
static rsRetVal
set_lnctx(ln_ctx *ctxln, char *instRules, uchar *instRulebase, char *modRules, uchar *modRulebase)
{
DEFiRet;
if (ctxln == NULL)
FINALIZE;
CHKmalloc(*ctxln = ln_initCtx());
ln_setErrMsgCB(*ctxln, errCallBack, NULL);
if(instRules) {
#if HAVE_LOADSAMPLESFROMSTRING == 1
if(ln_loadSamplesFromString(*ctxln, instRules) !=0) {
LogError(0, RS_RET_NO_RULEBASE, "error: normalization rules '%s' "
"could not be loaded", instRules);
ABORT_FINALIZE(RS_RET_ERR_LIBLOGNORM_SAMPDB_LOAD);
}
#else
(void)instRules;
#endif
} else if(instRulebase) {
if(ln_loadSamples(*ctxln, (char*) instRulebase) != 0) {
LogError(0, RS_RET_NO_RULEBASE, "error: normalization rulebase '%s' "
"could not be loaded", instRulebase);
ABORT_FINALIZE(RS_RET_ERR_LIBLOGNORM_SAMPDB_LOAD);
}
} else if(modRules) {
#if HAVE_LOADSAMPLESFROMSTRING == 1
if(ln_loadSamplesFromString(*ctxln, modRules) !=0) {
LogError(0, RS_RET_NO_RULEBASE, "error: normalization rules '%s' "
"could not be loaded", modRules);
ABORT_FINALIZE(RS_RET_ERR_LIBLOGNORM_SAMPDB_LOAD);
}
#else
(void)modRules;
#endif
} else if(modRulebase) {
if(ln_loadSamples(*ctxln, (char*) modRulebase) != 0) {
LogError(0, RS_RET_NO_RULEBASE, "error: normalization rulebase '%s' "
"could not be loaded", modRulebase);
ABORT_FINALIZE(RS_RET_ERR_LIBLOGNORM_SAMPDB_LOAD);
}
}
finalize_it:
if (iRet != RS_RET_OK){
ln_exitCtx(*ctxln);
*ctxln = NULL;
}
RETiRet;
}
BEGINbeginCnfLoad
CODESTARTbeginCnfLoad
loadModConf = pModConf;
pModConf->pConf = pConf;
ENDbeginCnfLoad
BEGINsetModCnf
struct cnfparamvals *pvals = NULL;
int i;
FILE *fp = NULL;
int ret;
char errStr[1024];
CODESTARTsetModCnf
pvals = nvlstGetParams(lst, &modpblk, NULL);
if(pvals == NULL) {
LogError(0, RS_RET_MISSING_CNFPARAMS, "mmkubernetes: "
"error processing module config parameters [module(...)]");
ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS);
}
if(Debug) {
dbgprintf("module (global) param blk for mmkubernetes:\n");
cnfparamsPrint(&modpblk, pvals);
}
loadModConf->de_dot = DFLT_DE_DOT;
loadModConf->busyRetryInterval = DFLT_BUSY_RETRY_INTERVAL;
loadModConf->sslPartialChain = DFLT_SSL_PARTIAL_CHAIN;
loadModConf->cacheEntryTTL = DFLT_CACHE_ENTRY_TTL;
loadModConf->cacheExpireInterval = DFLT_CACHE_EXPIRE_INTERVAL;
for(i = 0 ; i < modpblk.nParams ; ++i) {
if(!pvals[i].bUsed) {
continue;
} else if(!strcmp(modpblk.descr[i].name, "kubernetesurl")) {
free(loadModConf->kubernetesUrl);
loadModConf->kubernetesUrl = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
} else if(!strcmp(modpblk.descr[i].name, "srcmetadatapath")) {
free(loadModConf->srcMetadataPath);
loadModConf->srcMetadataPath = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
/* todo: sanitize the path */
} else if(!strcmp(modpblk.descr[i].name, "dstmetadatapath")) {
free(loadModConf->dstMetadataPath);
loadModConf->dstMetadataPath = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
/* todo: sanitize the path */
} else if(!strcmp(modpblk.descr[i].name, "tls.cacert")) {
free(loadModConf->caCertFile);
loadModConf->caCertFile = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
fp = fopen((const char*)loadModConf->caCertFile, "r");
if(fp == NULL) {
rs_strerror_r(errno, errStr, sizeof(errStr));
iRet = RS_RET_NO_FILE_ACCESS;
LogError(0, iRet,
"error: 'tls.cacert' file %s couldn't be accessed: %s\n",
loadModConf->caCertFile, errStr);
ABORT_FINALIZE(iRet);
} else {
fclose(fp);
fp = NULL;
}
} else if(!strcmp(modpblk.descr[i].name, "tls.mycert")) {
free(loadModConf->myCertFile);
loadModConf->myCertFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
fp = fopen((const char*)loadModConf->myCertFile, "r");
if(fp == NULL) {
rs_strerror_r(errno, errStr, sizeof(errStr));
iRet = RS_RET_NO_FILE_ACCESS;
LogError(0, iRet,
"error: 'tls.mycert' file %s couldn't be accessed: %s\n",
loadModConf->myCertFile, errStr);
} else {
fclose(fp);
fp = NULL;
}
} else if(!strcmp(modpblk.descr[i].name, "tls.myprivkey")) {
loadModConf->myPrivKeyFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
fp = fopen((const char*)loadModConf->myPrivKeyFile, "r");
if(fp == NULL) {
rs_strerror_r(errno, errStr, sizeof(errStr));
iRet = RS_RET_NO_FILE_ACCESS;
LogError(0, iRet,
"error: 'tls.myprivkey' file %s couldn't be accessed: %s\n",
loadModConf->myPrivKeyFile, errStr);
} else {
fclose(fp);
fp = NULL;
}
} else if(!strcmp(modpblk.descr[i].name, "allowunsignedcerts")) {
loadModConf->allowUnsignedCerts = pvals[i].val.d.n;
} else if(!strcmp(modpblk.descr[i].name, "skipverifyhost")) {
loadModConf->skipVerifyHost = pvals[i].val.d.n;
} else if(!strcmp(modpblk.descr[i].name, "token")) {
free(loadModConf->token);
loadModConf->token = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
} else if(!strcmp(modpblk.descr[i].name, "tokenfile")) {
free(loadModConf->tokenFile);
loadModConf->tokenFile = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
fp = fopen((const char*)loadModConf->tokenFile, "r");
if(fp == NULL) {
rs_strerror_r(errno, errStr, sizeof(errStr));
iRet = RS_RET_NO_FILE_ACCESS;
LogError(0, iRet,
"error: token file %s couldn't be accessed: %s\n",
loadModConf->tokenFile, errStr);
ABORT_FINALIZE(iRet);
} else {
fclose(fp);
fp = NULL;
}
} else if(!strcmp(modpblk.descr[i].name, "annotation_match")) {
free_annotationmatch(&loadModConf->annotation_match);
if ((ret = init_annotationmatch(&loadModConf->annotation_match, pvals[i].val.d.ar)))
ABORT_FINALIZE(ret);
} else if(!strcmp(modpblk.descr[i].name, "de_dot")) {
loadModConf->de_dot = pvals[i].val.d.n;
} else if(!strcmp(modpblk.descr[i].name, "de_dot_separator")) {
free(loadModConf->de_dot_separator);
loadModConf->de_dot_separator = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
#if HAVE_LOADSAMPLESFROMSTRING == 1
} else if(!strcmp(modpblk.descr[i].name, "filenamerules")) {
free(loadModConf->fnRules);
CHKiRet((array_to_rules(pvals[i].val.d.ar, &loadModConf->fnRules)));
#endif
} else if(!strcmp(modpblk.descr[i].name, "filenamerulebase")) {
free(loadModConf->fnRulebase);
loadModConf->fnRulebase = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
fp = fopen((const char*)loadModConf->fnRulebase, "r");
if(fp == NULL) {
rs_strerror_r(errno, errStr, sizeof(errStr));
iRet = RS_RET_NO_FILE_ACCESS;
LogError(0, iRet,
"error: filenamerulebase file %s couldn't be accessed: %s\n",
loadModConf->fnRulebase, errStr);
ABORT_FINALIZE(iRet);
} else {
fclose(fp);
fp = NULL;
}
#if HAVE_LOADSAMPLESFROMSTRING == 1
} else if(!strcmp(modpblk.descr[i].name, "containerrules")) {
free(loadModConf->contRules);
CHKiRet((array_to_rules(pvals[i].val.d.ar, &loadModConf->contRules)));
#endif
} else if(!strcmp(modpblk.descr[i].name, "containerrulebase")) {
free(loadModConf->contRulebase);
loadModConf->contRulebase = (uchar *) es_str2cstr(pvals[i].val.d.estr, NULL);
fp = fopen((const char*)loadModConf->contRulebase, "r");
if(fp == NULL) {
rs_strerror_r(errno, errStr, sizeof(errStr));
iRet = RS_RET_NO_FILE_ACCESS;
LogError(0, iRet,
"error: containerrulebase file %s couldn't be accessed: %s\n",
loadModConf->contRulebase, errStr);
ABORT_FINALIZE(iRet);
} else {
fclose(fp);
fp = NULL;
}
} else if(!strcmp(modpblk.descr[i].name, "busyretryinterval")) {
loadModConf->busyRetryInterval = pvals[i].val.d.n;
} else if(!strcmp(modpblk.descr[i].name, "sslpartialchain")) {
#if defined(SUPPORT_SSL_PARTIAL_CHAIN)
loadModConf->sslPartialChain = pvals[i].val.d.n;
#else
LogMsg(0, RS_RET_VALUE_NOT_IN_THIS_MODE, LOG_INFO,
"sslpartialchain is only supported for OpenSSL\n");
#endif
} else if(!strcmp(modpblk.descr[i].name, "cacheentryttl")) {
loadModConf->cacheEntryTTL = pvals[i].val.d.n;
} else if(!strcmp(modpblk.descr[i].name, "cacheexpireinterval")) {
loadModConf->cacheExpireInterval = pvals[i].val.d.n;
} else {
dbgprintf("mmkubernetes: program error, non-handled "
"param '%s' in module() block\n", modpblk.descr[i].name);
/* todo: error message? */
}
}
#if HAVE_LOADSAMPLESFROMSTRING == 1
if (loadModConf->fnRules && loadModConf->fnRulebase) {
LogError(0, RS_RET_CONFIG_ERROR,
"mmkubernetes: only 1 of filenamerules or filenamerulebase may be used");
ABORT_FINALIZE(RS_RET_CONFIG_ERROR);
}
if (loadModConf->contRules && loadModConf->contRulebase) {
LogError(0, RS_RET_CONFIG_ERROR,
"mmkubernetes: only 1 of containerrules or containerrulebase may be used");
ABORT_FINALIZE(RS_RET_CONFIG_ERROR);
}
#endif
if ((loadModConf->cacheExpireInterval > -1)) {
if ((loadModConf->cacheEntryTTL < 0)) {
LogError(0, RS_RET_CONFIG_ERROR,
"mmkubernetes: cacheentryttl value [%d] is invalid - "
"value must be 0 or greater",
loadModConf->cacheEntryTTL);
ABORT_FINALIZE(RS_RET_CONFIG_ERROR);
}
}
/* set defaults */
if(loadModConf->srcMetadataPath == NULL)
loadModConf->srcMetadataPath = (uchar *) strdup(DFLT_SRCMD_PATH);
if(loadModConf->dstMetadataPath == NULL)
loadModConf->dstMetadataPath = (uchar *) strdup(DFLT_DSTMD_PATH);
if(loadModConf->de_dot_separator == NULL)
loadModConf->de_dot_separator = (uchar *) strdup(DFLT_DE_DOT_SEPARATOR);
if(loadModConf->de_dot_separator)
loadModConf->de_dot_separator_len = strlen((const char *)loadModConf->de_dot_separator);
#if HAVE_LOADSAMPLESFROMSTRING == 1
if (loadModConf->fnRules == NULL && loadModConf->fnRulebase == NULL)
loadModConf->fnRules = strdup(DFLT_FILENAME_LNRULES);
if (loadModConf->contRules == NULL && loadModConf->contRulebase == NULL)
loadModConf->contRules = strdup(DFLT_CONTAINER_LNRULES);
#else
if (loadModConf->fnRulebase == NULL)
loadModConf->fnRulebase = (uchar *)strdup(DFLT_FILENAME_RULEBASE);
if (loadModConf->contRulebase == NULL)
loadModConf->contRulebase = (uchar *)strdup(DFLT_CONTAINER_RULEBASE);
#endif
caches = calloc(1, sizeof(struct cache_s *));
finalize_it:
if (fp)
fclose(fp);
if(pvals != NULL)
cnfparamvalsDestruct(pvals, &modpblk);
ENDsetModCnf
BEGINcreateInstance
CODESTARTcreateInstance
ENDcreateInstance
BEGINfreeInstance
CODESTARTfreeInstance
free(pData->kubernetesUrl);
msgPropDescrDestruct(pData->srcMetadataDescr);
free(pData->srcMetadataDescr);
free(pData->dstMetadataPath);
free(pData->caCertFile);
free(pData->myCertFile);
free(pData->myPrivKeyFile);
free(pData->token);
free(pData->tokenFile);
free(pData->fnRules);
free(pData->fnRulebase);
ln_exitCtx(pData->fnCtxln);
free(pData->contRules);
free(pData->contRulebase);
ln_exitCtx(pData->contCtxln);
free_annotationmatch(&pData->annotation_match);
free(pData->de_dot_separator);
msgPropDescrDestruct(pData->contNameDescr);
free(pData->contNameDescr);
msgPropDescrDestruct(pData->contIdFullDescr);
free(pData->contIdFullDescr);
ENDfreeInstance
static size_t curlCB(char *data, size_t size, size_t nmemb, void *usrptr)
{
DEFiRet;
wrkrInstanceData_t *pWrkrData = (wrkrInstanceData_t *) usrptr;
char * buf;
size_t newlen;
newlen = pWrkrData->curlRplyLen + size * nmemb;
CHKmalloc(buf = realloc(pWrkrData->curlRply, newlen));
memcpy(buf + pWrkrData->curlRplyLen, data, size * nmemb);
pWrkrData->curlRply = buf;
pWrkrData->curlRplyLen = newlen;
finalize_it:
if (iRet != RS_RET_OK) {
return 0;
}
return size * nmemb;
}
#if defined(SUPPORT_SSL_PARTIAL_CHAIN)
static CURLcode set_ssl_partial_chain(CURL *curl, void *ssl_ctx, void *userptr)
{
(void)userptr; /* currently unused */
CURLcode rv = CURLE_ABORTED_BY_CALLBACK;
X509_STORE *store = NULL;
store = SSL_CTX_get_cert_store((SSL_CTX *)ssl_ctx);
if(!store)
goto finalize_it;
if(!X509_STORE_set_flags(store, X509_V_FLAG_PARTIAL_CHAIN))
goto finalize_it;
rv = CURLE_OK;
finalize_it:
return rv;
}
#endif
BEGINcreateWrkrInstance
CODESTARTcreateWrkrInstance
CURL *ctx;
struct curl_slist *hdr = NULL;
char *tokenHdr = NULL;
FILE *fp = NULL;
char *token = NULL;
char *statsName = NULL;
CHKiRet(statsobj.Construct(&(pWrkrData->stats)));
if ((-1 == asprintf(&statsName, "mmkubernetes(%s)", pWrkrData->pData->kubernetesUrl)) ||
(!statsName)) {
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
CHKiRet(statsobj.SetName(pWrkrData->stats, (uchar *)statsName));
free(statsName);
statsName = NULL;
CHKiRet(statsobj.SetOrigin(pWrkrData->stats, UCHAR_CONSTANT("mmkubernetes")));
STATSCOUNTER_INIT(pWrkrData->k8sRecordSeen, pWrkrData->mutK8sRecordSeen);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("recordseen"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->k8sRecordSeen)));
STATSCOUNTER_INIT(pWrkrData->namespaceMetadataSuccess, pWrkrData->mutNamespaceMetadataSuccess);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacemetadatasuccess"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceMetadataSuccess)));
STATSCOUNTER_INIT(pWrkrData->namespaceMetadataNotFound, pWrkrData->mutNamespaceMetadataNotFound);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacemetadatanotfound"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceMetadataNotFound)));
STATSCOUNTER_INIT(pWrkrData->namespaceMetadataBusy, pWrkrData->mutNamespaceMetadataBusy);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacemetadatabusy"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceMetadataBusy)));
STATSCOUNTER_INIT(pWrkrData->namespaceMetadataError, pWrkrData->mutNamespaceMetadataError);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacemetadataerror"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceMetadataError)));
STATSCOUNTER_INIT(pWrkrData->podMetadataSuccess, pWrkrData->mutPodMetadataSuccess);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podmetadatasuccess"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podMetadataSuccess)));
STATSCOUNTER_INIT(pWrkrData->podMetadataNotFound, pWrkrData->mutPodMetadataNotFound);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podmetadatanotfound"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podMetadataNotFound)));
STATSCOUNTER_INIT(pWrkrData->podMetadataBusy, pWrkrData->mutPodMetadataBusy);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podmetadatabusy"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podMetadataBusy)));
STATSCOUNTER_INIT(pWrkrData->podMetadataError, pWrkrData->mutPodMetadataError);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podmetadataerror"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podMetadataError)));
STATSCOUNTER_INIT(pWrkrData->namespaceCacheNumEntries, pWrkrData->mutNamespaceCacheNumEntries);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacecachenumentries"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceCacheNumEntries)));
STATSCOUNTER_INIT(pWrkrData->podCacheNumEntries, pWrkrData->mutPodCacheNumEntries);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podcachenumentries"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podCacheNumEntries)));
STATSCOUNTER_INIT(pWrkrData->namespaceCacheHits, pWrkrData->mutNamespaceCacheHits);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacecachehits"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceCacheHits)));
STATSCOUNTER_INIT(pWrkrData->podCacheHits, pWrkrData->mutPodCacheHits);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podcachehits"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podCacheHits)));
STATSCOUNTER_INIT(pWrkrData->namespaceCacheMisses, pWrkrData->mutNamespaceCacheMisses);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("namespacecachemisses"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->namespaceCacheMisses)));
STATSCOUNTER_INIT(pWrkrData->podCacheMisses, pWrkrData->mutPodCacheMisses);
CHKiRet(statsobj.AddCounter(pWrkrData->stats, UCHAR_CONSTANT("podcachemisses"),
ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(pWrkrData->podCacheMisses)));
CHKiRet(statsobj.ConstructFinalize(pWrkrData->stats));
hdr = curl_slist_append(hdr, "Content-Type: text/json; charset=utf-8");
if (pWrkrData->pData->token) {
if ((-1 == asprintf(&tokenHdr, "Authorization: Bearer %s", pWrkrData->pData->token)) ||
(!tokenHdr)) {
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
} else if (pWrkrData->pData->tokenFile) {
struct stat statbuf;
fp = fopen((const char*)pWrkrData->pData->tokenFile, "r");
if (fp && !fstat(fileno(fp), &statbuf)) {
size_t bytesread;
CHKmalloc(token = malloc((statbuf.st_size+1)*sizeof(char)));
if (0 < (bytesread = fread(token, sizeof(char), statbuf.st_size, fp))) {
token[bytesread] = '\0';
if ((-1 == asprintf(&tokenHdr, "Authorization: Bearer %s", token)) ||
(!tokenHdr)) {
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
}
free(token);
token = NULL;
}
if (fp) {
fclose(fp);
fp = NULL;
}
}
if (tokenHdr) {
hdr = curl_slist_append(hdr, tokenHdr);
free(tokenHdr);
}
pWrkrData->curlHdr = hdr;
ctx = curl_easy_init();
curl_easy_setopt(ctx, CURLOPT_HTTPHEADER, hdr);
curl_easy_setopt(ctx, CURLOPT_WRITEFUNCTION, curlCB);
curl_easy_setopt(ctx, CURLOPT_WRITEDATA, pWrkrData);
if(pWrkrData->pData->caCertFile)
curl_easy_setopt(ctx, CURLOPT_CAINFO, pWrkrData->pData->caCertFile);
if(pWrkrData->pData->myCertFile)
curl_easy_setopt(ctx, CURLOPT_SSLCERT, pWrkrData->pData->myCertFile);
if(pWrkrData->pData->myPrivKeyFile)
curl_easy_setopt(ctx, CURLOPT_SSLKEY, pWrkrData->pData->myPrivKeyFile);
if(pWrkrData->pData->allowUnsignedCerts)
curl_easy_setopt(ctx, CURLOPT_SSL_VERIFYPEER, 0);
if(pWrkrData->pData->skipVerifyHost)
curl_easy_setopt(ctx, CURLOPT_SSL_VERIFYHOST, 0);
#if defined(SUPPORT_SSL_PARTIAL_CHAIN)
if(pWrkrData->pData->sslPartialChain) {
curl_easy_setopt(ctx, CURLOPT_SSL_CTX_FUNCTION, set_ssl_partial_chain);
curl_easy_setopt(ctx, CURLOPT_SSL_CTX_DATA, NULL);
}
#endif
pWrkrData->curlCtx = ctx;
finalize_it:
free(token);
free(statsName);
if ((iRet != RS_RET_OK) && pWrkrData->stats) {
statsobj.Destruct(&(pWrkrData->stats));
}
if (fp) {
fclose(fp);
}
ENDcreateWrkrInstance
BEGINfreeWrkrInstance
CODESTARTfreeWrkrInstance
curl_easy_cleanup(pWrkrData->curlCtx);
curl_slist_free_all(pWrkrData->curlHdr);
statsobj.Destruct(&(pWrkrData->stats));
ENDfreeWrkrInstance
/* next function is work-around to avoid type-unsafe casts. It looks
* like not really needed in practice, but gcc 8 complains and doing
* it 100% correct for sure does not hurt ;-) -- rgerhards, 2018-07-19
*/
static void
hashtable_json_object_put(void *jso)
{
json_object_put((struct fjson_object *)jso);
}